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Nelson, J.S., 1994

Carcharhiniformes ground sharks

Elasmobranchii

Lamniformes 135 M years

Shirai, S., 1996  | 

early Cretaceous

Marino

Fresh

Salmastro

Two dorsal fins (one dorsal fin in the scyliorhinid Pentachus profundicolus, known only from the holotype), without spines; anal fin present; five gill slits, with the last one to three over the pectoral fin; gill rakers absent; eyes with nictitating fold or membrane; spiracles present or absent; intestinal value of spiral or scroll type. Development may be oviparous, ovoviparous, or viviparous.

Greek eulanein, elasmos = metal beaten out + Greek brangchia = gills. Ref. 45335.

Greek, carcharias = shark Latin, clupea}, sardine + {Latin. Shape}, look, appearance, shape. 1880 (Ref. 45335).

( n = 9 ) -
Atelomycteridae Carcharhinidae Galeocerdonidae Hemigaleidae Leptochariidae Pentanchidae Proscylliidae Pseudotriakidae Scyliorhinidae Sphyrnidae Triakidae

Ref.
[ e.g. 9948]                       

Glossary
                    [ e.g. cephalopods]