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Family Gnathophyllidae
Key to genera and species
[Adapted from Chace, 1972]
Family Gnathophyllidae 149
Anterolateral angle of carapace not reaching beyond level of antennal spine; spines
on distal margin of telson not very unequal; third maxilliped with exopod
considerably overreaching endopod; second pereopod with carpus broader than
long; 3 posterior pereopods with dactyli nearly as broad as long, not bifid
Gnathophylloides mineri
Anterolateral angle of carapace reaching distinctly beyond level of antennal spine;
intermediate spines on distal margin of telson nearly twice, or more than twice, as
long as median pair; third maxilliped with exopod not overreaching endopod;
second pereopod with carpus distinctly longer than broad; 3 posterior pereopods
with dactyli distinctly longer than broad and bifid Gnathophyllum
Genus Gnathophyllum Latreille, 1819
Key to species
[Adapted from Chace, 1972]
1. Posterior tooth of dorsal rostral series situated on rostrum anterior to level of orbital
margin; color pattern composed of transverse stripes G. americanum
Posterior tooth of rostral series situated on carapace posterior to level of orbital
margin; color pattern composed of spots 2
2. (1) Pereopods slender, propodus of third and fourth pairs 12-15 times as long as wide;
color pattern composed of dark rings on slightly lighter background .G. circellum
Pereopods not usually slender, propodus of third and fourth pairs 7-8 times as long
as wide; color pattern composed of innumerable light dots on dark background
(posterior pair of lateral telson spines separated by distinct gap from series of
posterior spines; stylocerite falling short of level of articulation between first and
second segments of antennular peduncle) G. modestum