Basadromia, Artal, Pedro, Van Bakel, Barry W. M., Domínguez, José L. & Gómez, Guillermo, 2016

Artal, Pedro, Van Bakel, Barry W. M., Domínguez, José L. & Gómez, Guillermo, 2016, A new dromiid crab (Crustacea, Brachyura, Dromioidea) from the Upper Eocene of Huesca (Aragón, northern Spain), Zootaxa 4061 (4), pp. 438-446 : 440

Basadromia n. gen.

Type species. Basadromia longifrons n. sp.

Diagnosis. Small carapace, longitudinally subelliptical in outline, slightly longer than wide, maximum width at position of epibranchial region; markedly convex in both directions; front fairly projecting beyond orbits, narrow, with notable V-shaped notch and deep groove, bearing four long, subtriangular teeth plus short rostral tooth situated in lower plane; orbits small, anterolaterally disposed, supraorbital margin with strong supraorbital (inner orbital) tooth, anterior portion of supraorbital margin nearly vertical; lateral margins of carapace broadly arched, with short, subtle teeth; posterior margin narrow, being narrower than orbitofrontal margin; dorsal surface strongly areolated, uniformly granular; dorsal regions very well defined and individualised by swellings and grooves; epibranchial regions large, elongated, posterior portion distinctly swollen; mesogastric region transversely subelliptical, swollen, with subtle axial depression, broad subtriangular anterior extension; epibranchial region large, divided into 2 portions, axial portion strongly swollen; cardiac region large, markedly swollen, inverted subpentagonal in shape; cervical, branchial grooves clearly marked. Dorsal surface of carapace, chelipeds densely, uniformly granular.

Etymology. From Basa, the name of the valley in the province of Huesca (Aragón, Spain) from where the new form was recovered, and - dromia, the common suffix for members of the family and superfamily.

Remarks. The new genus differs from all extinct and extant members assigned to the Dromioidea ( Guinot and Tavares, 2003; Ng et al., 2008; Karasawa et al., 2011; McLay, 2001a, b; Schweitzer et al., 2012) in having four strong, conspicuously long, frontal teeth, a narrow posterior carapace margin, the posterior portion of the protogastric region being nearly hemispherical and the axial portion of the epibranchial region strongly swollen, subelliptical in shape.