Diaulota Casey, 1894

Tasaku, Yuto, Ono, Hiroki & Maruyama, Munetoshi, 2023, Review of the intertidal rove beetle tribe Liparocephalini Fenyes (Coleoptera, Staphylinidae, Aleocharinae) from Japan, Zootaxa 5383 (3), pp. 251-296 : 257

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.

Figures

FIGURE 1 Definitions of measurements of body parts. A, adult of Diaulota; B, head of Diaulota aokii, dorsal view; C, head of Rotundicephala koheii sp. n., dorsal view.

FIGURE 5 Habitus of Diaulota spp. A, D. aokii; B, D. decipiens sp. n. (holotype); C, D. hokkaidona. Scale bar: 1.0 mm.

FIGURE 8 Diaulota uenoi. A, habitus, male; B, ditto, female; C, labium; D, mentum; E, median lode of aedeagus, lateral view; F, internal structure of median lobe, dorsal view; G, ditto, ventral view; H, spermatheca. Scale bars: 1.0 mm for A, B; 0.1 mm for C–H. Abbreviation: as, apical sclerite; su, suspensonia.

FIGURE 10 Habitus and mouthparts of Diaulota submarina. A, habitus, male; B, ditto, female; C, labium, D, mentum. Scale bars: 1.0 mm for A & B; 0.1 mm for C & D.

FIGURE 12 Diaulota orientalis sp. n. A, habitus, male (holotype); B, ditto, female (paratype); C, labium; D, mentum; E, median lode of aedeagus, lateral view; F, internal structure of median lobe, ventral view; G, spermatheca. Scale bars: 1.0 mm for A & B; 0.1 mm for C–G.

FIGURE 13 Diaulota oharai. A, habitus, male; B, ditto, female; C, median lobe of aedeagus, lateral view; D, spermatheca. Scale bars: 1.0 mm for A & B; 0.1 mm for C & D.