Genus Diaulota Casey, 1894

[Japanese name: Tsutsumune-umi-hanekakushi-zoku]

Diaulota Casey, 1893: 353 (original description; type species: D. densissima Casey, 1893); Ahn, 1996: 271 (redescription; diagnosis; key to species); Song et al., 2018: 931 (diagnosis; revised key).

Genoplectes Sawada, 1955: 81 (original description; type species: G. uenoi Sawada, 1955).

Diagnosis. From other genera of Liparocephalini, this genus can be distinguished by the combinations of the following characteristics: body small and robust (Figs. 5A–C; 8A & B; 10A & B; 12A & B; 13A & B), head longer than wide (Fig. 1B), tarsal formula 4-4-4 or 4-4-5. It is similar to Liparocephalus, but can be distinguished by its smaller body and slender apical lobe of paramere (see also the diagnosis of Liparocephalus). It is also similar to Rotundicephala gen. n. but can be distinguished by its oblong head (Fig. 1B) and other character states (see also the diagnosis for Rotundicephala gen. n.). Sexual dimorphism in head shape (such as L. tokunagai) is evident in the D. uenoi, D. submarina, D. orientalis sp. n. and D. oharai .

Distribution. Japan: Hokkaidô, Honshû, Shikoku, Kyûshû, Ryûkyû; Korea; Russia; Canada; USA; Mexico.