Taxonomy of Finfish (1+2)

Carcharhinus amboinensis (Mullerand Henle, 1839)

Classification:

Phylum: Chordata

Class: Chondrichthyes

Subclass : Elasmobranchii

Order Carcharhiniformes:

Family : Carcharhinidae

Genera : Carcharhinus

Species : amboinensis

Key character used for the identification of the order Carcharhiniformes:

• Two dorsal fins without spines
• anal fin present
• Five gill slits. the last one to three over the pectoralfin
• Gill rakers absent
• Eye with nictitating fold or membrane
• Intestinal value of spiral or scroll type

Key character used for the identification of the family CARCHARHINIDAE:

• Eyes on sides of head, with a well-developed nictitating lower eyelid;
• Intestine with a scroll valve
• Anterior teeth in upper jaw smaller than lateral teeth and not separated from them by smaller intermediate teeth on each side
• Upper edge of caudal fin with a rippled or undulating margin;
• Precaudal pits present;

Key character used for the identification of the genus Carcharhinus

• No gill rakers or keels on caudal peduncle;
• Second dorsal fin 2/5 height of first dorsal fin or less; precaudal pits transverse and crescentic
• Second dorsal-fin origin usually near anal-fin origin but usually well anterior to anal-fin insertion
• post ventral margin of caudal fin deeply incised
• no lateral keels on caudal peduncle;
• first dorsal-fin base equidistant between pectoral- and pelvic-fin bases or (usually) closer to pectoral fins

Key character used for the identification of the genus Carcharhinusamboinensis

• Species level identification are mainly based on morphology and teeth structure.
• Upper anterior teeth with broadly triangular cusps,not well delimited from bases
• Snout very short, its length about equal to, or less than the inter nasal space; no inter dorsal ridge
• First dorsal fin relatively higher(3.2 times or more) than second dorsal; second dorsal fin with a straight or nearly straight posterior margin