INFRAORDER : PENAEIDEA

SUPERFAMILY : PENAEOIDEA

1. Family : Solenoceridae

Post orbital spine is present, cervical groove deep, reaching or almost reaching from the hepatic region to the middorsal line of the carapace. Dorsal and ventral antennular flagella lamellate; lateral ramus of uropod generally lacking distolateral spine, postrostral crest low and rounded. ...................Solenocera crassicornis

I Family : Penaeidae

Key to the Genera

1 Rostrum without ventral teeth

Rostrum with dorsal and ventral teeth

PENAEUS

2. 1) A distal fixed pair of spines on the telson and 1-3 pairs of mobile spines ..................3

No distal fixed pair of spine on the telson, lateral mobile spines may be present .......5

3. 2 PETASMA symmetrical, 3rd maxilliped without basial spine ......................................4

PETASMA asymmetrical, 3rd maxilliped with basial spine .................Metapenaeopsis

4. 3 Carapace with longitudinal sutures extending from post-orbital margin to almost posterior margin ; parapenaeid spine minute or absent, second pereopod without a basal spine .............................Parapenaeus

5. 2 No exopod on 5th pereopod, pleurobranch on 7th thoracis somite present ........... Metapenaeus

Exopod on 5th pereopod present, pleurobranch on 7th thoracic somite absent .........6

6. 5. Carapace with longitudinal sutures, ischial spine on 2nd pereopod absent ...................7

Carapace without longitudinal suture, ischial spine on 2nd pereopod present .........Atypopenaeus

7 6) 3rd pereopod with epipodite, first pereopod with a ischial spine which may be minute ......Trachypenaeus

3rd pereopod without epipodite, first pereopods without a ischial spine .............. Parapenaeopsis.