Atelecyclus undecimdentatus (Herbst, 1783)

Garassino, Alessandro, Pasini, Giovanni, Angeli, Antonio De & Hyžný, MatÚš, 2014, The decapod fauna (Axiidea, Anomura, Brachyura) from the Late Pleistocene of Trumbacà, Reggio Calabria (Calabria, southern Italy), Natural History Sciences 1 (2), pp. 119-130 : 127

Atelecyclus undecimdentatus (Herbst, 1783)

Fig. 3B

Material and measurements: One right cheliped, lacking dactylus (MSNM i27879 – hpa: 11 mm; li: 6 mm; lpa: 14 mm).

Discussion. The studied specimen shows close affinities with the cheliped of the fossil and extant Atelecyclus undecimdentatus (Herbst, 1783) , as described and figured by Garassino et al. (2012: 38; fig.18 B), having palm of cheliped slightly convex, trapezoidal in outline, spinate dorsally, with three distinct longitudinal tuberculate rims and index downward-directed. Based upon these peculiar characters, we ascribe the specimen to A. undecimdentatus . This species was previously reported by Garassino et al. (2012) from the Zanclean (Early Pliocene) of “La Serra” quarry ( Pisa , Tuscany, central Italy). Extant A. undecimdentatus lives in the eastern Atlantic and, less commonly, in Mediterranean Sea from 1 m to 60 m deep on sandy or gravel bottoms.

Figures

Fig. 3 - A) Pisa armata (Latreille, 1803), MSNM i27880, right chela, outer and inner views (x 3.2). B) Atelecyclus undecimdentatus (Herbst, 1783), MSNM i27879, right chela, outer view (x 3.7). C) Pilumnus hirtellus (Linnaeus, 1761), MSNM i27904, carapace in dorsal view (x 8.5). D) Pilumnus hirtellus (Linnaeus, 1761), MSNM i27912, right chela, outer and inner views (x 7.5). E) Xantho cf. X. incisus (Leach, 1814), MSNM i27908, left chela, outer and inner views (x 4.6).