Calappilia, A. Milne-Edwards, 1873

Schweitzer, Carrie E. & Feldmann, Rodney M., 2010, New fossil decapod crustaceans from the Remy Collection, Muséum national d’Histoire naturelle, Paris, Geodiversitas 32 (3), pp. 399-415 : 402

publication ID	https://doi.org/ 10.5252/g2010n3a3
persistent identifier	https://treatment.plazi.org/id/815F8783-F960-FFD6-DB10-FF3CFEFCB732
treatment provided by	Felipe
scientific name	Calappilia
status

Treatment

Calappilia View in CoL ? gorodiskii (Remy in Gorodiski & Remy, 1959) n. comb. ( Fig. 1B View FIG )

Atelecyclus gorodiskii Remy in Gorodiski & Remy, 1959: 318, pl. 19, fig. 2. — Salva & Feldmann 2001: 49.

TYPE MATERIAL. — Holotype (dorsal carapace; MNHN R03840, coll. Gorodiski), paratype of M’Bathié ( Senegal) not present in the MNHN Collections.

TYPE LOCALITY. — Pougnar ( Senegal), Upper Lutetian ( Gorodiski & Remy 1959).

DISCUSSION

The type specimen originally referred to Atelecyclus gorodiskii is quite incomplete. All of the margins are broken, and nothing remains of the front and orbits. Dorsal carapace regions are reasonably well preserved, however, and indicate narrow, elongate axial regions bordered by deep axial grooves; small, narrow protogastric regions; and large, granular ornamentation on all of the carapace regions. The carapace appears to have been ovate, but it is not possible to know for certain because of the broken margins. Comparison of the nature of the carapace regions with members of the Atelecyclidae (e.g., illustrations in Salva & Feldmann 2001) indicates that the species is not a member of that family. Species of Atelecyclus Leach, 1814 , have arcuate swellings parallel to the lateral margins of the cardiac region, which are absent in Atelecyclus gorodiskii . Other genera within the Atelecyclidae and the related Cancridae Latreille, 1802 , have narrow axial regions, but they are not as long as those of Atelecyclus gorodiskii , and the cardiac and intestinal regions are never as long in those families as in Atelecyclus gorodiskii .

The Calappidae can better accommodate Atelecyclus gorodiskii . Members of that family possess narrow, elongate axial regions bordered by deep axial grooves; small, narrow protogastric regions; and often possess large, granular ornamentation on all of the carapace regions, all of the observable features on Atelecyclus gorodiskii . Herein we tentatively refer the species to Calappilia , a common Eocene genus characterized by all of these features. In addition, Calappilia possesses spines on the posterolateral margin as does A. gorodiskii , and lacks a posterolateral flange of spines, as is seen in many species of Calappa Weber, 1795 . More complete specimens will be necessary to confirm generic placement for this species; however, placement within the Calappidae seems reasonable.