XXXIV.— Key to the Isopods of the Pacific Coast of North America, with descriptions of twenty-two new species
1899; Taylor & Francis; Volume: 4; Issue: 23 Linguagem: Inglês
10.1080/00222939908678208
ISSN0374-5481
Autores Tópico(s)Crustacean biology and ecology
ResumoAnalytical Key to the Genera of Janiride.a.* Eyes dorsal.Antenne of first pair well developed, with multiarticulate flagellum.Antenne of second pair long, with multiarticulate flagellum, peduncular joints not dilated.Mandibles with a three-jointed palp and with cutting-part separated from molar part by a deep incision.6 Head without any true rostrum.First pair of antenne extremely small, with flagellum rudimentary.Second pair of antenne of moderate length, without any distinctly squamiform appendage.First pair of legs not prehensile.Uropoda extremely small, branches very short, nodiform .. 25.Jara.b'.Head with prominent rostral projection, or with a comparatively small rostrum, or without rostrum.First pair of antennze well developed; flagellum multiarticulate.Second pair of antenne very much elongated, with a well-marked scale-like appendage outside of third joint.First pair of legs prehensile, carpus large, subfusiform, and edged inside with spines ; propodus narrow, linear, and very movably articulated to carpus, so as to admit of being bent in against it.Uropoda largely developed, with branches slightly unequal.c.Head with lateral parts produced to very prominent acute lappets.Segments of thorax with lateral parts laciniate and produced.Caudal segment forming on each side, at the end, a triangular expansion syilats'® Wisitlle w abayede «tof cot wee eine 26.Ianthe.ce'.Head with lateral parts not produced into lappets.Segments of thorax with lateral parts not produced, not laciniate.Caudal segment rounded, not expanded laterally ,.. 25. «luau «lamer cere 27.Janira.nL i ene
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