Apristurus riveri
No common name
NS
GNR
Collection Details
Specimens
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Records
Taxonomic Hierarchy
Chondrichthyes (Cartilaginous Fishes)
Carcharhiniformes (Ground Sharks)
Scyliorhinidae (Cat Sharks)
Apristurus
Apristurus riveri
Description
This species account was compiled from
Composite (multiple sources) (McEachran, J.D. and J.D. Fechhelm. Fishes of the Gulf of Mexico. University of Texas Press, Austin.)
and processed using AI-assisted text extraction.
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Characters
Relatively slender; preorbital snout length one-half to two-thirds of preorbital length; narrow snout; anal fin separated from caudal fin by narrow notch; upper caudal fin lobe lacks crest of enlarged denticles; preoral snout length 7% to 10% of TL; distance between nostrils 1.4 to 1.7 times nostril length; labial furrows well developed in both jaws; gill slits 2/3 to slightly greater than eye length; eye length 3% to 4% of TL; first dorsal fin about one-half size of second dorsal fin; origin of first dorsal fin over posterior one-half of pelvic fin base; distance between dorsal fin bases about equal to twice length of first dorsal fin base
Uniform dark brown
Distribution
Western North Atlantic from Cuba, northern Gulf of Mexico, and Panama
Northern Gulf of Mexico
Habitat Associations
Marine. bathydemersal. depth range 700-1500 m.
Biology
Maximum known size is 46 cm TL
Embryonic development is oviparous; males mature at 43 to 46 cm TL, and females mature at 40 to 41 cm TL
Found on the continental slopes. Oviparous, with one egg per oviduct laid at a time. Sexual dimorphism in adults unusually well-developed.
IUCN Red List Status: Least Concern (LC), assessed 2019-06-18. Resilience: Very low (Fec assumed to be <10).
Phylogeny and Morphologically Similar Fishes
Distinguished from other species of the family by the combination of characters described
Commercial or Environmental Importance
Fisheries: of no interest.
References
Bigelow and Schroeder 1944
Bigelow and Schroeder 1948a
Springer 1966
Springer 1979
Castro 1983
Compagno 1984
Breder, C.M. and D.E. Rosen (1966) Modes of reproduction in fishes. T.F.H. Publications, Neptune City, New Jersey. 941 p.
Compagno, L.J.V. (1984) FAO Species Catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 2 - Carcharhiniformes. FAO Fish. Synop. 125(4/2):251-655. Rome: FAO.
Bigelow, H.B. and W.C. Schroeder (1948) Sharks. p. 59-546. In J. Tee-Van, C.M. Breder, S.F. Hildebrand, A.E. Parr and W.C. Schroeder (eds.) Fishes of the Western North Atlantic. Part one. Lancelets, cyclostomes, sharks. Sears Foundation for Marine Research, Yale University, New Haven. 576 p.
McEachran, J.D. and J.D. Fechhelm (1998) Fishes of the Gulf of Mexico. Volume 1: Myxiniformes to Gasterosteiformes. University of Texas Press, Austin. 1112p.
Kiraly, S.J., J.A. Moore and P.H. Jasinski (2003) Deepwater and other sharks of the U.S. Atlantic Ocean Exclusive Economic Zone. Mar. Fish. Rev. 65(4):1-64.
Comments On Apristurus riveri