Language: English | Chinese

FishBase

Order Summary for Carcharhiniformes
Main Ref.:	Nelson, J.S., 1994
Order:	Carcharhiniformes    ground sharks
Class:	Elasmobranchii (sharks and rays)
Sister Order:	Lamniformes     135 M years
Ref.:	Shirai, S., 1996
First fossil record:	early Cretaceous
Occurs in:	Marine      Freshwater      Brackish
Remarks:	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.
Class etymology:	Greek eulanein, elasmos = metal beaten out + Greek brangchia = gills. Ref. 45335.
Order etymology:	Greek, carcharias = shark Latin, clupea}, sardine + {Latin. Shape}, look, appearance, shape. 1880. Ref. 45335.
Families:	7 Carcharhinidae , Hemigaleidae , Leptochariidae , Proscylliidae , Pseudotriakidae , Scyliorhinidae , Sphyrnidae , Triakidae

Identification keys | Tree of Life

Ref.:   ( e.g. 9948)
Comments & Corrections		Sign our Guest Book

Page created by: Eli, 17.10.00, last modified by Eli, 15.02.05.