Palaeocorystoidea

Van Bakel, Barry W. M., Guinot, Danièle, Artal, Pedro, Fraaije, René H. B. & Jagt, John W. M., 2012, A revision of the Palaeocorystoidea and the phylogeny of raninoidian crabs (Crustacea, Decapoda, Brachyura, Podotremata) 3215, Zootaxa 3215 (1), pp. 1-216 : 164

Palaeocorystoidea versus Glaessneropsoidea Patrulius, 1959

This comparison considers Glaessneropsoidea sensu Schweitzer & Feldmann (2009, 2010b–c) and Schweitzer et al. (2010). This assemblage comprises five families: Glaessneropsidae Patrulius, 1959 , Lecythocaridae Schweitzer & Feldmann, 2009 , Longodromitidae Schweitzer & Feldmann, 2009 , Nodoprosopidae Schweitzer & Feldmann, 2009 , and Konidromitidae Schweitzer & Feldmann, 2010c . Only carapace material is so far known, and both the composition and diagnosis of the superfamily (Schweitzer & Feldmann 2009: 82) are far from stable at the moment, exemplified by the various rigorous changes recently proposed by Karasawa et al. (2011); additional studies are needed to elaborate its status.

Carapace.

‒ Carapace gently convex in transverse direction in Palaeocorystoidea (strongly convex in Glaessneropsoidea).

‒ Front as wide as or narrower than orbits in Palaeocorystoidea (much broader, more prominent in Glaessneropsoidea).

‒ Groove system shallow and subtle in Palaeocorystoidea (acute and prominent in Glaessneropsoidea).

‒ Cervical groove generally much more strongly incised in Glaessneropsoidea than in Palaeocorystoidea .

‒ Branchial groove weak, not notching the carapace margins in Palaeocorystoidea (always clearly defined, notching margins in Glaessneropsoidea).