Laeviglyphiulus, Wesener & RÜhr, 2025

Laeviglyphiulus gen. nov.

LSID urn:lsid:zoobank.org:act:

Type species: Laeviglyphiulus patrickmuelleri sp. nov.

Etymology: Laeviglyphiulus , masculine, from laevis = smooth, in contrast to numerous other genera of Cambalopsidae with the presence of especially numerous carinae on the body segments.

Diagnosis: Laeviglyphiulus gen. nov. differs from the only other known member of the order from the Cretaceous, the Electrocambalidae , in the absence of setation of the tergites and head ( Fig. 1A–D View Fig ) (vs. present in the Electrocambalidae ), as well as the absence of legs only on body ring 4 ( Fig. 1C View Fig ) (vs. body rings 3 and 4 in the Electrocambalidae ), as well as other family-level characters (see above). Laeviglyphiulus gen. nov. shares gnathochilarium ( Fig. 2E View Fig ) and gonopod characteristics, in which the anterior gonopods form a flat shield-like structure ( Fig. 3A–E View Fig ), only with the common and diverse SE Asian extant species of the genera Hypocambala Silvestri, 1897 , Plusioglyphiulus Silvestri, 1923 and Glyphiulus Gervais, 1842 . Te more complex gonopods of Laeviglyphiulus gen. nov. with a flagellum ( Fig. 3A–E View Fig ) are quite similar to the diverse SE Asian genus Plusioglyphiulus but also to some species of Hypocambala . Laeviglyphiulus gen. nov. differs from Plusioglyphiulus in the complete absence of any ornamentation (crests or tubercles) on the collum or other body rings ( Figs. 1C,D View Fig , 2A–D View Fig ). Laeviglyphiulus differs from all species of Hypocambala in the combination of absence of both tergal setation and collum crests, as well as a more strongly reduced male leg 1 ( Fig. 2H, I View Fig ). Te collum is also enlarged in Plusioglyphiulus , and more moderately so in the genus Glyphiulus and Hypocambala , but of normal size, if not even smaller than normal body rings ( Figs. 1C View Fig , 2A–G View Fig ), in Laeviglyphiulus gen. nov.. Laeviglyphiulus gen. nov. shares most characters with extant species of the morphologically diverse genus Hypocambala .