Family Procilliidae Finback Catsharks. Family Characters Small sharks, usually less than 1 meter Two...
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Transcript of Family Procilliidae Finback Catsharks. Family Characters Small sharks, usually less than 1 meter Two...
![Page 1: Family Procilliidae Finback Catsharks. Family Characters Small sharks, usually less than 1 meter Two spineless dorsal fins, anal fin First dorsal anterior.](https://reader036.fdocuments.us/reader036/viewer/2022062401/5a4d1b247f8b9ab059996547/html5/thumbnails/1.jpg)
Family ProcilliidaeFinback Catsharks
![Page 2: Family Procilliidae Finback Catsharks. Family Characters Small sharks, usually less than 1 meter Two spineless dorsal fins, anal fin First dorsal anterior.](https://reader036.fdocuments.us/reader036/viewer/2022062401/5a4d1b247f8b9ab059996547/html5/thumbnails/2.jpg)
Family Characters• Small sharks, usually less than 1 meter• Two spineless dorsal fins, anal fin• First dorsal anterior of pelvic fin origin• Long, ribbon-like caudal fin
– Smooth margin and subterminal notch, low rise above body axis
• Elongate “cat-eyes” with nictitating eyelids• Spiral intestines
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Eridacnis sinuans
Eridacnis barbouri
Ctenacis fehlmanni - Harlequin catshark *Eridacnis radcliffei - Pygmy ribbontail catshark
Smallest of the Carcharhinidae 15-19cm Eridacnis sinuans - African ribbontail catshark * Eridacnis barbouri - Cuban ribbontail catshark *
Largest of the Procilliidae, 200cm Proscyllium habereri - Graceful catshark Proscyllium venustum – (Chinese)Proscyllium magnificum – Magnificent catshark Gollum attenuatus - Slender smooth-hound *
Or in Pseudotriakidae, debate dates to 1954
* named by Compagno, 1973, 1984
4 genera, 8 species
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Differences from Catsharks and Pseudotrikidae
• Dorsal fin origin anterior of pelvic fin origin– Nearer to Pectoral margin
• Tall, upright dorsal – Pseudotrikidae elongated
dorsal
• Reproduction– Scyliorhinidae: oviparous, – Procillids: viviparous
![Page 5: Family Procilliidae Finback Catsharks. Family Characters Small sharks, usually less than 1 meter Two spineless dorsal fins, anal fin First dorsal anterior.](https://reader036.fdocuments.us/reader036/viewer/2022062401/5a4d1b247f8b9ab059996547/html5/thumbnails/5.jpg)
Reproduction
• Yolk-sac viviparous– Some debate in 2 genus (Ctenacis and Procillius) but little known
• Sexual Maturity: 70 cm in Gollum attenuatus • Litter size: where reported, 2 pups/litter• Pups: measure ~ 10 cm in E. radcliffei
– an 18cm female: 1 - 2 pups, 11cm long– G. attenuatus: 100cm female, 44cm young
![Page 6: Family Procilliidae Finback Catsharks. Family Characters Small sharks, usually less than 1 meter Two spineless dorsal fins, anal fin First dorsal anterior.](https://reader036.fdocuments.us/reader036/viewer/2022062401/5a4d1b247f8b9ab059996547/html5/thumbnails/6.jpg)
Embryonic development in Gollum attenuatus
•Mature ovary produces large number of fertilized ova
•One ova develops into embryo
•Remaining ova form external yolk sac
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Feeding and Prey• Feeding habits are poorly
known• Small cuspidate teeth • C. fehlmanni has a large
pharynx & specialized gill rakers possibly for small invertebrate prey
• Feed on small teleosts, benthic crustaceans and cephalopods
Different head morphologies could indicate varying prey-capture methods
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Habitat and Distribution• Found in mainly in bathydemersal habitat, 50 – 750 m• Soft bottoms, continental shelf to slope• Tropical to warm-temperate distribution• Most with small ranges: Tropical Indo-Pacific, Tanzania,
Florida Straits to Cuba.
Map: E. radcliffei
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Proscyllium venustum
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Newest species Proscyllium magnificum
• One specimen, three observations– off of (Myanmar) Burma, E. Indian O., Andaman sea– Collected Dec. 3, 1989
• Some morphological character differences: – inter-dorsal length, second dorsal placement, labial furrow lengths
• Held in zoological collections of Australian Museums Ichthyology H 5887-01
• Naming competition currently at Fishbase.org – P. magnificum
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P. Magnificum
• Awaiting second email response from Dr. Peter Last, identified P. Magnificum as new species in 2004.
• Hoping for a PDF of the Phuket Marine Biological Center research bulletin.
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• Yano, Kazunari. 1993. Reproductive biology of the slender smoothhound, Gollum attenuatus,collected from New Zealand waters. Environ. Biol. Fishes 38: 59-71,1993.
• Last, P. R. and V. Vongpanich, 2004. A new finback catshark Proscyllium magnificum (Elasmobranchii: Proscylliidae) from the northeastern Indian Ocean. Phuket Mar. Biol. Center Res. Bull. Vol. 65, pp. 23-29.
• 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.
• Bass, A.J. and L.J.V. Compagno, 1986. Proscylliidae. p.87-88. In M.M. Smith and P.C. Heemstra (eds.) Smiths' sea fishes. Springer-Verlag, Berlin.
• Dulvy, N.K. and J.D. Reynolds. 1997. Evolutionary transitions among egg-laying, live-bearing and maternal inputs in sharks and rays. Proc. R. Soc. Lond. B. Vol 264, pp. 1309-1315.
• DeBruin, G.H.P., B.C. Russell and A. Bogusch. 1995. The Marine Fishery Resources of Sri Lanka. FAO species identification field guide for fishery purposes. FAO, Rome Italy. 446 pgs.