Albaidaplax, Garassino, Pasini & Castro, 2013

Pasini, Giovanni, Garassino, Alessandro & Sami, Marco, 2018, Decapod crustaceans from the late Pliocene (Piacenzian) nearby Faenza (Emilia-Romagna, N Italy), Natural History Sciences 5 (2), pp. 27-32 : 31

Albaidaplax cfr. A. ispalensis Garassino, Pasini & Castro, 2013

( Fig. 3C )

Material and measurements: one specimen in dorsal view in part and counterpart from Podere Tombarona ( MSF 2226 a, b – lcxp: 9 mm; wcxp: 12 mm) .

Description. Carapace transversely rectangular, slightly wider than long; straight front; front as wide as the orbits; inner edge of supraorbital margin distinct; wide orbits expanded distally, with one short tooth on outer orbital angle; supraorbital margins gently sinuous, without fissures; anterolateral margins slightly convex, apparently toothless; long gently rounded posterolateral margins, strongly convergent posteriorly; long, straight posterior margin; deep gastric pits; smooth dorsal surface of carapace; slight subhorizontal ridge, moderately convex, at level of anteroposterolateral margins, without clear indication of regions; stout heavy chelipeds (P1), with moderately long merus; subtriangular spineless carpus; stout globular palm; dactylus and index slender, as long as the propodus, with smooth occlusal margin.

Discussion. Despite the poor preservation of the exocuticle, partially covered by carbonate deposits, the main morphological characters of the studied specimen, such as the shape of the carapace, the wide orbits gently expanded distally, with one short tooth on outer orbital angle, and the gently sinuous supraorbital margins, are shared with the representatives of Albaidaplax , recently erected by Garassino et al. (2013), with A. ispalensis Garassino, Pasini & Castro, 2013 , from the Pliocene of Spain and Italy. Due to its poor preservation the specimen is here prudentially only compared with the type species. This would be the first report for the genus from the Emilia-Romagna.

Figures

Fig. 3 - A) Monodaeus bortolottii Delle Cave, 1988, MSF 2234 (x 2.6). B) Goneplax rhomboides (Linnaeus, 1758), MSF 2250 (x 3.4). C) Albaidaplax cf.A. ispalensis Garassino, Pasini & Castro, 2013, MSF 2226 (x 3.2).