MARINIE GAMMARIDEAN AMPHIPODA 83 



Figure 32. — Astyridae: a, mandible, note setose and conical but nontriturative molar 



[see Synopiidae, Pardaliscidae, most Eusirldae, Vitjazianidae]; b, accessory flagellum 



[see Synopiidae, Oedicerotidae, Vitjazianidae, Hyperiopsidae]; c, lower lip, note widely 



separated outer lobes [highly characteristic] [see Paramphithoidae]; d, gnathopod 1 



(2 is similar) [see Liljeborgiidae, most Oedicerotidae, Vitjazianidae]; ej, extremes of 



telson. 



Eusiridae generally have an elongate telson, and often enlarged gnathopods. Hyperiopsidae 



have bent maxillary palps, and elongated fourth articles of pereopods 1-2. Haustoriidae 



generally have either a multiarticulate accessory flagellum, or a large or triturative molar. 



Astyrid cephalons may resemble those of Synopiidae (see fig. 31). Two paramphithoid 



genera, with nontriturative molars and weakly acuminate coxae, resemble Astyridae closely. 



