A subclass of cartilaginous fish comprising the SHARKS; rays; skates (SKATES (FISH);), and sawfish. Elasmobranchs are typically predaceous, relying more on smell (the olfactory capsules are relatively large) than sight (the eyes are relatively small) for obtaining their food.
The common name for all members of the Rajidae family. Skates and rays are members of the same order (Rajiformes). Skates have weak electric organs.

Intercellular bridges between granulosa cells and the oocyte in the elasmobranch Raya asterias. (1/59)

In the present ultrastructural study intercellular bridges, connecting somatic granulosa cells to oocyte, have been detected for the first time and their modifications have been followed during Raja oogenesis. Intercellular bridges make their first appearance in small previtellogenic follicles as connecting devices between small cells and the oocyte. Later on, when the follicular epithelium becomes polymorphic and multilayered, for the presence of small, large, and pyriform-like cells, intercellular bridges link the oocyte and the different granulosa cells. Intercellular bridges contain ribosomes, whorl of membranes, mitochondria and vacuoles. Such cytoplasmic components are present also in the cell apex of large and pyriform-like cells thus suggesting, in agreement with other species (Motta et al. J. Exp. Zool., 1996;276:223-241) they may flow toward the oocyte. In this regard the presence of intercellular bridges during the oogenesis of cartilagineous fish may represent a crucial event of the active cooperation between granulosa cells and the oocyte.  (+info)

Retropositional parasitism of SINEs on LINEs: identification of SINEs and LINEs in elasmobranchs. (2/59)

Some previously unidentified short interspersed repetitive elements (SINEs) and long interspersed repetitive element (LINEs) were isolated from various higher elasmobranchs (sharks, skates, and rays) and characterized. These SINEs, members of the HE1 SINE family, were tRNA-derived and were widespread in higher elasmobranches. The 3'-tail region of this SINE family was strongly conserved among elasmobranchs. The LINEs, members of the HER1 LINE family, encoded an amino acid sequence similar to that encoded by the chicken CR1 LINE family, and they contained a strongly conserved 3'-tail region in the 3' untranslated region. This tail region of the HER1 LINE family was almost identical to that of the HE1 SINE family. Thus, the HE1 SINE family and the HER1 LINE family provide a clear example of a pair of SINEs and LINEs that share the same tail region. Conservation of the secondary structures of the tail regions, as well as of the nucleotide sequences, between the HE1 SINE family and HER1 LINE family during evolution suggests that SINEs utilize the enzymatic machinery for retroposition of LINEs through the recognition of higher-order structures of the conserved 3'-tail region. A discussion is presented of the parasitism of SINEs on LINEs during the evolution of these retroposons.  (+info)

The synaptic vesicle protein SV2 is complexed with an alpha5-containing laminin on the nerve terminal surface. (3/59)

Interactions between growing axons and synaptic basal lamina components direct the formation of neuromuscular junctions during nerve regeneration. Isoforms of laminin containing alpha5 or beta2 chains are potential basal lamina ligands for these interactions. The nerve terminal receptors are unknown. Here we show that SV2, a synaptic vesicle transmembrane proteoglycan, is complexed with a 900-kDa laminin on synaptosomes from the electric organ synapse that is similar to the neuromuscular junctions. Although two laminins are present on synaptosomes, only the 900-kDa laminin is associated with SV2. Other nerve terminal components are absent from this complex. The 900-kDa laminin contains an alpha5, a beta1, and a novel gamma chain. To test whether SV2 directly binds the 900-kDa laminin, we looked for interaction between purified SV2 and laminin-1, a laminin isoform with a similar structure. We find SV2 binds with high affinity to purified laminin-1. Our results suggest that a synaptic vesicle component may act as a laminin receptor on the presynaptic plasma membrane; they also suggest a mechanism for activity-dependent adhesion at the synapse.  (+info)

Low mass-specific brain Na+/K+-ATPase activity in elasmobranch compared to teleost fishes: implications for the large brain size of elasmobranchs. (4/59)

Elasmobranch fishes have long been noted for having unusually large brains for ectotherms, and therefore may be exceptions to the rule that vertebrates in general devote less than 8% of their resting metabolic rate to the central nervous system. The brain mass of sharks, skates and rays is often several times larger than that of teleost fishes of the same size. Still, the underlying reasons for this have remained unclear. Ion pumping by the Na+/K+-ATPase is the single most energy consuming process in the brain. In this study, Na+/K+-ATPase activity was measured in the brain of four species of elasmobranchs and 11 species of teleosts. While the average brain mass of the elasmobranchs examined was approximately three times that of the teleosts, the mean specific Na+/K+-ATPase activity was only about one-third of that of the teleosts. Thus, the total brain Na+/K+-ATPase activity was similar in elasmobranchs and teleosts. This suggests that the large brain size of elasmobranchs is at least partly related to a low mass-specific rate of brain energy use.  (+info)

The pit organs of elasmobranchs: a review. (5/59)

Elasmobranchs have hundreds of tiny sensory organs, called pit organs, scattered over the skin surface. The pit organs were noted in many early studies of the lateral line, but their exact nature has long remained a mystery. Although pit organs were known to be innervated by the lateral line nerves, and light micrographs suggested that they were free neuromasts, speculation that they may be external taste buds or chemoreceptors has persisted until recently. Electron micrographs have now revealed that the pit organs are indeed free neuromasts. Their functional and behavioural role(s), however, are yet to be investigated.  (+info)

Detection and processing of electromagnetic and near-field acoustic signals in elasmobranch fishes. (6/59)

The acoustic near field of quietly moving underwater objects and the bio-electric field of aquatic animals exhibit great similarity, as both are predominantly governed by Laplace's equation. The acoustic and electrical sensory modalities thus may, in directing fishes to their prey, employ analogous processing algorithms, suggesting a common evolutionary design, founded on the salient physical features shared by the respective stimulus fields. Sharks and rays are capable of orientating to the earth's magnetic field and, hence, have a magnetic sense. The electromagnetic theory of orientation offers strong arguments for the animals using the electric fields induced by ocean currents and by their own motions in the earth's magnetic field. In the animal's frame of reference, in which the sense organs are at rest, the classical concept of motional electricity must be interpreted in relativistic terms. In the ampullae of Lorenzini, weak electric fields cause the ciliated apical receptor-cell membranes to produce graded, negative receptor currents opposite in direction to the fields applied. The observed currents form part of a positive-feedback mechanism, supporting the generation of receptor potentials much larger than the input signal. Acting across the basal cell membranes, the receptor potentials control the process of synaptic transmission.  (+info)

Contractile properties of the elasmobranch rectal gland. (7/59)

The importance of the rectal gland in elasmobranch osmoregulation is well established. The rate of secretion by the gland is under the control of a variety of secretagogues and inhibitors. Early morphological work suggested that a band of smooth muscle cells surrounds the periphery of the shark rectal gland between the secretory tubules and the connective tissue capsule. To confirm the presence of the muscle ring, we examined histological sections from two species of shark, Squalus acanthias and Carcharodon carcharius, and from the stingray Dasyatis sabina and stained sections from S. acanthias with the actin-specific ligand phalloidin. In all three species, a distinct band of what appeared to be smooth muscle cells was evident, and the putative muscle ring in S. acanthias stained specifically with phalloidin. Moreover, isolated rings of rectal gland tissue from S. acanthias constricted when acetylcholine or endothelin was applied and responded to nitric oxide with an initial dilation, followed by a more substantial constriction. Subsequent addition of porcine C-type natriuretic peptide dilated the rings, but two prostanoids (carbaprostacyclin and prostaglandin E(1)) did not change ring tension significantly. The rings did not respond to the endothelin-B-specific agonist sarafotoxoin S6c, suggesting that the response to endothelin was mediated via endothelin-A-type receptors. Our data confirm the presence of a smooth muscle ring in the periphery of the elasmobranch rectal gland and demonstrate that the gland responds to a suite of smooth muscle agonists, suggesting that changes in the dimensions of the whole rectal gland may play a role in its secretory function.  (+info)

Digenea and acanthocephala of elasmobranch fishes from the southern coast of Brazil. (8/59)

New records for helminth species recovered from elasmobranch fishes in Brazil are established. Digenean and acanthocephalan parasites of elasmobranch fishes are reported from the southern coast of Brazil: Otodistomum veliporum (Creplin, 1837) Stafford, 1904 (Digenea: Azygiidae) in the stomach and spiral valve of Dipturus trachydermus and in the spiral valve of Squatina sp. Cystacanths and juveniles of the acanthocephalans Corynosoma australe Johnston, 1937 and Corynosoma sp., in the spiral valve of Squatina sp., Galeorhinus galeus and Hexanchus griseus and in the stomach of Squalus megalops; a juvenile of Gorgorhynchus sp., in the spiral valve of Sphyrna zygaena. Dipturus trachydermus and Squatina sp. are new host records for O. veliporum. Digeneans and acanthocephalans are reported for the first time parasitizing elasmobranch fishes in Brazil.  (+info)

'Elasmobranchii' is a superorder in the class Chondrichthyes, which includes all sharks, skates, rays, and sawfishes. This group is characterized by several distinct features, including:

1. Cartilaginous skeletons: Unlike bony fishes, elasmobranchs have skeletons made of cartilage rather than bone.
2. Five to seven gill slits: Most elasmobranchs have five pairs of gill slits on each side of their body, although some species may have six or seven pairs. These gill slits are open to the outside environment and lack protective covers found in bony fishes.
3. Heterocercal tail: Elasmobranchs possess a unique tail structure called a heterocercal tail, where the upper lobe is longer than the lower lobe. This tail design provides powerful propulsion and maneuverability in the water.
4. Dermal denticles: The skin of elasmobranchs is covered with small, tooth-like structures called dermal denticles, which provide a protective covering and reduce friction while swimming.
5. No swim bladders: Unlike bony fishes, elasmobranchs do not have a gas-filled swim bladder to help maintain buoyancy. Instead, they rely on their large liver, which contains low-density oil, to provide some degree of buoyancy.
6. Electrosensory organs: Many elasmobranchs possess specialized sensory organs called the ampullae of Lorenzini, which allow them to detect electric fields generated by living organisms and other environmental sources. This ability aids in hunting, navigation, and communication.
7. Carnivorous diet: Elasmobranchs are primarily carnivorous, feeding on various marine animals such as fish, squid, and crustaceans. Some species may also consume smaller elasmobranchs.
8. Live birth or egg laying: Most elasmobranchs reproduce by giving live birth (viviparity), where the embryos develop inside the mother's body and receive nourishment through a placenta-like structure. However, some species lay eggs (oviparity) in protective cases called mermaid's purses.
9. Slow growth and late maturity: Elasmobranchs generally grow slowly and reach sexual maturity at a relatively advanced age compared to many bony fishes. This slow life history makes them particularly vulnerable to overfishing and other human-induced threats.

The name Elasmobranchii comes from the Ancient Greek words elasmo- ("plate") and bránchia ("gill"), referring to the broad, ... Elasmobranchii is one of the two subclasses of cartilaginous fish in the class Chondrichthyes, the other being Holocephali ( ... Skaphandrus.com Elasmobranchii (Webarchive template wayback links, All articles with dead external links, Articles with dead ... Elasmobranchii (/ɪˌlæzməˈbræŋkiaɪ/) is a subclass of Chondrichthyes or cartilaginous fish, including sharks (superorder ...
Elasmobranchii)". PalZ. 74 (3): 363-377. doi:10.1007/BF02988107. Hotton, Nicholas (1952). "Jaws and Teeth of American Xenacanth ...
Elasmobranchii; Etmopteridae) from the Middle Miocene Bessho Formation in Azumino City, Nagano Prefecture, Japan". Research ... Koike, H.; Ohe, F.; Narita, K. (2008). "A fossil dermal denticle, Scymnodon ichiharai (Elasmobranchii; Somniosidae) from ...
Elasmobranchii indet. Elasmosauridae indet. Enchodontidae indet. Mosasauridae indet. Plesiosauria indet. Polycotylidae indet. ...
Containing the Elasmobranchii. London: Trustees of the British Museum. doi:10.5962/bhl.title.161983. Arambourg, C. (1935). " ... Elasmobranchii) from the 'Mid'-Cretaceous and their palaeontological implications". Zoological Journal of the Linnean Society. ...
Elasmobranchii Class 3. Actinopterygii Class 4. Crossopterygii Class 5. Amphibia Class 6. Reptilia Class 7. Aves Class 8. ... Gnathostomata Class Elasmobranchii (= Chondrichthyes) [p. 175] Subclass 1. Selachii Order 1. †Cladoselachii (e.g., † ...
Paleozoic Elasmobranchii: Teeth". Handbook of Paleoichthyology. Volume 3D: 1-168. Sharks portal Paleontology portal v t e v t e ...
Paleozoic Elasmobranchii: Teeth. Munich: Verlag Dr. Friedrich Pfeil. ISBN 978-3-89937-116-1. Tapanila, L.; Pruitt, J. (2019). " ...
Stethacanthus altonensis (Elasmobranchii) from the Bear Gulch Limestone of Montana. Annals of Carnegie museum, 45(8), 161-178 ... Chondrichthyes I: Paleozoic Elasmobranchii. H.P. Schultze (ed.), Handbook of Paleoichthyology, New York, 115pp ZANGERL, R., ... Chondrichthyes is a monophyletic group divisible into two sister taxa, the Elasmobranchii and Holocephali, and the extant ... Stethacanthids are classified within the division Paleoselachii, of the Subclass Elasmobranchii. On a lower taxonomical level, ...
Zangerl, R. (1981). Chondrichthyes I - Paleozoic Elasmobranchii. Handbook of Paleoichthyology. Stuttgart: Gustav Fischer Verlag ...
1988), to Elasmobranchii by Williams (1998), and to Chondrichthyes by Sepkoski in 2002 and by Maisey in 2008. The uncrushed ... Zangerl, R. (1981). Chondrichthyes I - Paleozoic Elasmobranchii. Handbook of Paleoichthyology. Stuttgart: Gustav Fischer Verlag ...
In contrast to their sister group Elasmobranchii (containing true sharks, rays, and kin), euchondrocephalans are primarily an ... Zangerl, R. (1981). Chondrichthyes I - Paleozoic Elasmobranchii. Handbook of Paleoichthyology. Stuttgart: Gustav Fischer Verlag ...
Glyphis gangeticus (Elasmobranchii, Carcharhinidae)'. In: 7th Indo-Pacific Fish Conference. Howard International Hotel, Taipei ...
Ginter, M. (2012-08-17). Chondrichthyes, Paleozoic Elasmobranchii: Teeth. In H.P. Schultze (ed.), Handbook of Paleoichthyology ... This fish is currently classed within the Elasmobranchii, more specially in its own grouping, the Squatinactiformes. This fish ...
Symmoriiforms and Cladoselache may form an early-diverging clade at the base of Chondrichthyes or Elasmobranchii, similar to ... Zangerl, R. (1981). Chondrichthyes I - Paleozoic Elasmobranchii. Handbook of Paleoichthyology. Stuttgart: Gustav Fischer Verlag ... Elasmobranchii, is much more diverse in the present, including modern sharks (Selachii), rays (Batoidea), and their extinct ... "Elasmobranchii" (Chondrichthyes), but also that both taxa carried unusual specializations relative to the estimated ancestral ...
Mesozoic and Cenozoic Elasmobranchii. Schultze H.-P. (ed.), Handbook of Paleoichthyology, Volume 3B. Gustav Fischer Verlag, ...
Mesozoic and Cenozoic Elasmobranchii". Handbook of Paleoichthyologie (Volume 3B). Stuttgart: Gustav Fischer Verleg. pp. 85-110 ...
Zangerl, R. (1981). Chondrichthyes I - Paleozoic Elasmobranchii. Handbook of Paleoichthyology. Stuttgart: Gustav Fischer Verlag ...
Chondrichthyes I (Paleozoic elasmobranchii). Gustav Fischer. ISBN 3-437-30337-6. OCLC 1116152115. Froese, Rainer and Pauly, ...
Zidek, J.; Johnson, G.D.; May, W.; Claborn, A. (2003). "New specimens of Xenacanth and Hybodont sharks (Elasmobranchii: ... Ginter, Michał (2010). Chondrichthyes: Paleozoic Elasmobranchii: teeth. Pfeil. ISBN 978-3-89937-116-1. OCLC 730808836. ...
Zangerl, R. (1981). Chondrichthyes I - Paleozoic Elasmobranchii. Handbook of Paleoichthyology. Stuttgart: Gustav Fischer Verlag ...
Chondrichthyes I: Paleozoic Elasmobranchii. Vol. 1. Lubrecht & Cramer Limited, 1981. "Helicoprion". Geocities. Retrieved 18 ...
Brignon, A. (2021). "Historical and nomenclatural remarks on some megatoothed shark teeth (Elasmobranchii, Otodontidae) from ... Cappetta, H. (1987). "Mesozoic and Cenozoic Elasmobranchii". Handbook of Paleoichthyology. Vol. 3B. München, Germany: Friedrich ... Containing the Elasmobranchii. British Museum (Natural History). pp. 415-420. doi:10.5962/bhl.title.61854. Yabe, H.; Goto, M.; ... Elasmobranchii, Lamniformes) (PDF). pp. 100-136. S., Kenshu; Bonnan, M. F.; Becker, M. A.; Griffiths, M. L. (2021). " ...
Mesozoic and Cenozoic Elasmobranchii: Teeth. Verlag Dr. Friedrich Pfeil. pp. 512pp. ISBN 978-3-89937-148-2. Henri Cappetta; ... Guillaume Guinot; Henri Cappetta; Charlie J. Underwood & David J. Ward (2012). "Batoids (Elasmobranchii: Batomorphii) from the ... Friedrich H. Pfeil (2012). "Proteothrinax, a new replacement name for Thrinax Pfeil, 1983 (Elasmobranchii: Chlamydoselachidae ... Elasmobranchii) and their bearing on the evolution of dental enameloid in Neoselachii". Journal of Vertebrate Paleontology. 32 ...
Mesozoic and Cenozoic Elasmobranchii: Teeth. Munich: Verlag Dr. Friedrich Pfeil. ISBN 978-3-89937-148-2. Jambura, P.L.; Stumpf ...
Mesozoic and Cenozoic Elasmobranchii: Teeth. Munich: Verlag Dr. Friedrich Pfeil. ISBN 978-3-89937-148-2. Neuman, A.G.; Brinkman ...
Mesozoic and Cenozoic Elasmobranchii: Teeth. Munich: Verlag Dr. Friedrich Pfeil. ISBN 978-3-89937-148-2. Amalfitano, J. (2021 ...
Mesozoic and Cenozoic Elasmobranchii: Teeth. Munich: Verlag Dr. Friedrich Pfeil. ISBN 978-3-89937-148-2. Shimada, K. (2008). " ...
Mesozoic and Cenozoic Elasmobranchii: Teeth. Munich: Verlag Dr. Friedrich Pfeil. ISBN 978-3-89937-148-2. (Articles with short ...
Mesozoic and Cenozoic Elasmobranchii: Teeth. Munich: Verlag Dr. Friedrich Pfeil. ISBN 978-3-89937-148-2. Greenfield, T.; ...
The name Elasmobranchii comes from the Ancient Greek words elasmo- ("plate") and bránchia ("gill"), referring to the broad, ... Elasmobranchii is one of the two subclasses of cartilaginous fish in the class Chondrichthyes, the other being Holocephali ( ... Skaphandrus.com Elasmobranchii (Webarchive template wayback links, All articles with dead external links, Articles with dead ... Elasmobranchii (/ɪˌlæzməˈbræŋkiaɪ/) is a subclass of Chondrichthyes or cartilaginous fish, including sharks (superorder ...
Similar words for Elasmobranchii. Definition: noun. sharks; rays; dogfishes; skates. ...
Mesozoic and Cenozoic Elasmobranchii: Teeth). A special volume 3C will deal with the skeletal anatomy of the Elasmobranchii. ... 3D Chondrichthyes (Paleozoic Elasmobranchii: Teeth) was awarded a price for outstanding accomplishment by the Polish Minister ... Subclass Elasmobranchii 47. Order Xenacanthiformes 47. Family Xenacanthidae 47. Order Eugeneodontiformes 48. Family Edestidae ... 3D Chondrichthyes (Paleozoic Elasmobranchii: Teeth) appeared in 2010, and now Chondrichthyes 3E ( ...
Guia para identificação dos tubarões, raias e quimeras do Rio de Janeiro (Chondrichthyes: Elasmobranchii e Holocephali) Autores ... Studies on New Zealand Elasmobranchii. Part XII, The species of Squalus from New Zealand and Australia; and a a general account ... a new deep-water skate (Elasmobranchii, Rajidae) from the western Indian Ocean off South Mozambique, and a revised generic ... Sobre a ocorrência de Rhincodon typus SMITH, 1829 (Elasmobranchii, Rhincodontidae) em águas brasileiras e aspectos de sua ...
Tag: elasmobranchii. Almost-Living Fossils Month #27 - Those Giant Sharks. For the final entry this month, lets look at a ... elasmobranchii, fish, hybodontidae, hybodontiformes, hybodusLeave a comment on Almost-Living Fossils Month #09 - Horned Sharks ... elasmobranchii, fish, lamniformes, mackerel shark, megalodon, megatooth shark, otodontidae, otodus, selachimorpha, sharkLeave a ... elasmobranchii, fish, neoselachii, palaeospinacidae, paraorthacodus, synechodontiformesLeave a comment on Almost-Living Fossils ...
Sharks and rays (Elasmobranchii spp.) Pursuant to Decision 18.224 of the 18th meeting of the Conference of the Parties (CoP18, ... Decisions 19.222-227 on Sharks and rays (Elasmobranchii spp.) *SC74 Doc. 67.1 Legal acquisition findings and control and ... Elasmobranchii spp.). The group was mandated to inter alia develop guidance on the making of legal acquisition findings, and ...
Background. The decline of the populations of the three Critically Endangered species Squatina aculeata Cuvier, 1829, Squatina oculata Bonaparte, 1840, and Squatina squatina (Linnaeus, 1758) in the Mediterranean basin is mainly attributed to overexploitation by demersal fisheries, in particular bottom trawls, but also artisanal and recreational. The survey of their occurrence in the basin in parallel with the collection of biological information are essential in order to develop or improve conservation strategies. For that reason, the presently reported study aimed to enrich knowledge on today’s distribution and biology of one of the above-mentioned endangered species, S. aculeata. Materials and methods. Information on the incidental capture of twenty specimens of S. aculeata in various Mediterranean regions was provided between 2011 and 2020 by professional fishermen and citizen scientists. Thirteen specimens were identified through examination of photos taken directly on board, or at the fish
Heslerodidae (Chondrichthyes, Elasmobranchii), a New Family of Paleozoic Phalacanthous Sharks. John G Maisey ...
ICCWC link. ICCWC aims to enhance the capacity and compliment the efforts of national wildlife law enforcement agencies and sub-regional and regional networks that on a daily basis act to combat the illegal trafficking in wild fauna and flora.. MIKE link. The CITES Monitoring the Illegal Killing of Elephants (MIKE) Programme is a site-based system designed to monitor trends in the illegal killing of elephants, build management capacity and provide information to help range States make appropriate management and enforcement decisions.. CTSP link. The CITES tree species programme aims to provide direct financial assistance to Parties in taking conservation and management measures to ensure that their trade in timber, bark, extracts and other products from CITES-listed tree species is sustainable, legal and traceable.. ...
First record of Squalus clarkae (Elasmobranchii: Squalidae) in the Southwest Gulf of Mexico. Del Moral-Flores L.F., Paleo- ...
e) Elasmobranchii, Actinopterygii & Sarcopterygii Eschmeier, W. N. 1998. Catalog of Fishes. 3 vols. California Academy of ...
Class: Elasmobranchii. Order: Rhinopristiformes. Family: Rhinobatidae Guitarfishes. Genus: Rhinobatos. (See list of species ...
Dark silver- gray on back fading white underside. Snout somewhat rounded. Size: To about 3 m
Common, rare or extirpated? Shifting baselines for common angelshark, Squatina squatina (Elasmobranchii: Squatinidae), in the ...
Subclassis: Elasmobranchii Infraclassis: Euselachii. Division/Cohort: Neoselachii. Subdivision/Subcohort: Selachimorpha ...
Subclassis: Elasmobranchii Infraclassis: Euselachii. Division/Cohort: Neoselachii. Subdivision/Subcohort: Selachimorpha ...
Not only is the handsome Yorkshire Canary one of the largest of the canary breeds, it is also one of the older breeds!. With its proud diplomatic stance, the Yorkshire Canary has invoked such names as "The Guardsman", and the "Gentleman of the Fancy" during its long history. Though It is not quite the same bird today as it was in the the mid 1800s, then being described as "so slim it could pass through a wedding ring", it is a tall slender alert bird with a proud bearing.. The Yorkshire Canary is a favorite of fanciers throughout the world. Because of Its length, being well over 6 inches, it will need to be housed in a larger cage than that of the smaller canary breeds, It will also need a larger nest and be a bit more demanding in its diet.. For more information about the care of Canaries see ...
Part 1. (Amphioxus, Cyclostomata, Elasmobranchii, and Teleostei -- Isospondyli to Heterosomata.). Ann. S. Afr. Mus. v. 21 (pt 1 ... from Izu Peninsula, southern Japan (Scyliorhinidae, Elasmobranchii). Jpn. J. Ichthyol. v. 39 (núm. 1): 9-16. ...
Elasmobranchii (Class). *Neoselachii (Subclass). *Selachii (Infraclass). *Galeomorphi (Superorder). *Orectolobiformes (Order). ...
Elasmobranchii (Class). *Neoselachii (Subclass). *Selachii (Infraclass). *Galeomorphi (Superorder). *Carcharhiniformes (Order) ...
Elasmobranchii (Class). *Neoselachii (Subclass). *Batoidea (Infraclass). *Rajiformes (Order). *Rajidae (Family). *Neoraja ( ...
Additions aux faunes de sélaciens du Crétacé du Texas / Neoselachier (Pisces, Elasmobranchii) aus der Unterkreide. 70,00 €. ...
Elasmobranchii. common name: cartilaginous fishes rank: subclass * Mammalia. common name: mammals rank: class ...
Elasmobranchii (Subclass). Squaliformes (Order). Squalidae (Family). References. Recent Publications. *[Title unknown.]. * ...
Abstract Although Permian fossils have been known from the Parnaíba Basin for two centuries, and some faunal and flora elements are well known worldwide, research on the fossil assemblages from this basin has lagged relative to other, more accessible basins. In the last decade, however, there has been a significant increase in the study of fossils from the two Permian units of the basin: the Pedra de Fogo and Motuca formations. The goal of this contribution is to synthesize and update the existing data on the Permian macrofossils from these formations, and to use them to address biostratigraphic, palaeoenvironmental and palaeogeographical questions. The Pedra de Fogo and Motuca formations are likely to be Cisuralian in age. Contrary to previous reports, there is more than one stratigraphic interval that preserves petrified fossil plants. The possible marine influence proposed for the Pedra de Fogo Formation must be reassessed based on the strongly terrestrial character of its fossil ...
Elasmobranchii (Subclass). Torpediniformes (Order). Torpedinidae (Family). References. Recent Publications. *First records of ...
  • Elasmobranchii (/ɪˌlæzməˈbræŋkiaɪ/) is a subclass of Chondrichthyes or cartilaginous fish, including sharks (superorder Selachii), rays, skates, and sawfish (superorder Batoidea). (wikipedia.org)
  • Elasmobranchii is one of the two subclasses of cartilaginous fish in the class Chondrichthyes, the other being Holocephali (chimaeras). (wikipedia.org)
  • Mineral homeostasis and regulation of mineralization processes in the skeletons of sharks, rays and relatives (Elasmobranchii). (mpg.de)
  • The name Elasmobranchii comes from the Ancient Greek words elasmo- ("plate") and bránchia ("gill"), referring to the broad, flattened gills which are characteristic of these fishes. (wikipedia.org)
  • Shifting baselines for common angelshark, Squatina squatina (Elasmobranchii: Squatinidae), in the Northern Adriatic Sea (Mediterranean Sea). (ogs.it)
  • Elasmobranchii (/ɪˌlæzməˈbræŋkiaɪ/) is a subclass of Chondrichthyes or cartilaginous fish, including sharks (superorder Selachii), rays, skates, and sawfish (superorder Batoidea). (wikipedia.org)
  • Members of the elasmobranchii subclass have no swim bladders, five to seven pairs of gill clefts opening individually to the exterior, rigid dorsal fins, and small placoid scales. (wikipedia.org)
  • Sharks, together with rays and skates , make up the subclass Elasmobranchii of the Chondrichthyes. (britannica.com)
  • Elasmobranch (subclass Elasmobranchii) is a group of cartilaginous fishes that include sharks (superorder Selachii) and rays (superorder Batoidea). (frontiersin.org)
  • Elasmobranchii is one of the two subclasses of cartilaginous fish in the class Chondrichthyes, the other being Holocephali (chimaeras). (wikipedia.org)
  • They are divided into two subclasses: Elasmobranchii (sharks, rays, and skates) and Holocephali (chimaera, sometimes called ghost sharks). (newworldencyclopedia.org)
  • Nouvelles faunes de Sélaciens (Elasmobranchii, Neoselachii) de l'Éocène moyen des Landes (Sud−Ouest, France). (palass.org)
  • Mesozoic and Cenozoic Elasmobranchii, Chondrichthyes II. (palass.org)
  • The Elasmobranchii are sometimes divided into two superorders, Selachimorpha (sharks) and Batoidea (rays, skates, sawfish). (newworldencyclopedia.org)
  • Subfilos Cephalochordata (Acrania y Vertebrata (Acrania) - Lista de especies registradas en Cuba (octubre de 2006). (si.edu)
  • Apicomplexa: Haemogregarinidae) from a freshwater Cururu Stingray Potamotrygon cf. histrix (Elasmobranchii: Potamotrygonidae), from the Amazon Region, Brazil. (nih.gov)
  • Computer Generated Species Richness Map for Elasmobranchii. (aquamaps.org)