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Genus Metapenaeopsis Bouvier, 1905
Key to species
[Adapted from P6rez Farfante, 1971]
Family Penaeidae 83
1. Thelycum with median plate bearing horseshoe-shaped marginal strip and coiled
lateral strips; petasma with distoventral projection cleft by deep sinus into 2 long,
subequallobes M. smithi
Thelycum with median plate lacking marginal and coiled strips; petasma with
distoventral projection simple, forming one single lobe or cleft by shallow sinus
into 2 short, subequal, or into 2 unequal lobes .. 2
2. (1) Thelycum with anterior part of median plate convex, bearing 2 large pits; petasma
with distoventral projection mittenlike in outline, large left lobe extending distally
far beyond small right lobule M. gerardoi
Thelycum with anterior part of median plate long, half or more as long as median
plate; petasma with distoventral projection cleft into 2 unequal lobes, right lobe
noticeably larger than left M. goodei
Genus Parapenaeus Smith, 1886
Key to species
[Adapted from Roberts and Pequegnat, 1970]
Branchiostegal spine present behind anterior margin of carapace; rostral teeth
usually seven; epigastric tooth and hepatic spine not as far behind orbital margin as
in P. americanus P. politus
Branchiostegal spine on anterior margin of carapace; rostral teeth usually six;
epigastric tooth and hepatic spine farther behind orbital margin than in P. politus ....
.... P. americanus