Liadyxianus, Prokin, Alexander A., Petrov, Pyotr N., Wang, Bo & Ponomarenko, Alexander G., 2013

Prokin, Alexander A., Petrov, Pyotr N., Wang, Bo & Ponomarenko, Alexander G., 2013, New fossil taxa and notes on the Mesozoic evolution of Liadytidae and Dytiscidae (Coleoptera), Zootaxa 3666 (2), pp. 137-159 : 143

Liadyxianus gen. n.

Etymology: From the generic name Liadytiscus and Yixian Formation; gender masculine.

Type species: Liadyxianus kirejtshuki sp. n.

Diagnosis: Metacoxal plate somewhat shorter than lateral lobe of metaventrite (LC/LV slightly less than 1). Metaventrite with elevated rounded median area. Metacoxal lines weakly diverging anteriad. Metacoxal processes more or less conjointly truncate posteriorly, with posterior margins appearing somewhat sinuate, with incision between them. Lateral lobe of metaventrite not reaching lateral margin of metepisternum and metacoxal plate. Hindleg long, equal in length to abdomen. Metafemur, when stretched, reaching posterior margin of abdominal ventrite 3; metatibia longer than metafemur. Abdominal ventrite 1 shorter medially than any other abdominal ventrite; ventrite 2 longer medially than any other abdominal ventrite.

Comparison: The new genus differs from Liadytiscus and Liadroporus in the shorter metafemur, when stretched, reaching posterior margin of ventrite 3, and metacoxa somewhat shorter than lobe of metaventrite. It differs from Liadroporus in the more or less conjointly truncate metacoxal processes.