Amblopusa brevipes Casey, 1893

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 : 278-280

Amblopusa brevipes Casey, 1893

[Japanese name: Kita-nokoba-umi-hanekakushi]

( Figs. 12C ; 18E–G ; 19 ; 26A )

Amblopusa brevipes Casey, 1893: 356 (original description; type locality: Fort Wrangel, Alaska); Zerche, 1998: 106 (characters; habitus photograph; phylogenetic analysis); Yoo &Ahn, 2020: 506 (redescription; habitus photograph). For other references, see Yoo & Ahn (2020).

Amblopusa pallida Casey, 1911: 212 (original description; type locality: Victoria, Vancouver Island).

Material examined. Japan: Hokkaidô: 58 unsexed, Ishikari-shi, Atsuta-ku, Gokibiru , 22. III. 2020, Y. Tasaku ( KUM, cYT) ; 2 males, 1 female, 15 unsexed, ditto, 2. V. 2020, Y. Tasaku (cYT) ; 1 male, 4 unsexed, Shimamakimura, Taihei, estuary of Taihei-gawa , 12. V. 2020, D. Sumikawa (cYT) .

Diagnosis. This species can be distinguished from other Amblopusa species by the body size (about 2.5 mm) except A. pacifica . From A. pacifica , it can be distinguished the following characteristics: pronotum slightly convex with anterolateral margin rounded ( Fig. 17C ); median lobe of aedeagus with apical lobe acute at apex in lateral view ( Fig. 18E ).

Distribution. Japan: western Hokkaidô; Canada; USA: Alaska, the Aleutian Islands, California ( Fig. 26A ). Newly recorded from Japan.

Figures

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 17 Habitus of Amblopusa spp. A, A. magna; B, A. pacifica; C, A. brevipes; D, A.hokkaidona. Scale bar: 1.0 mm.

FIGURE 18 Genitalia of Amblopusa spp. A & B, A. magna (A, median lobe of aedeagus; B, spermatheca); C & D, A. pacifica (C, median lobe of aedeagus; D, spermatheca); E–G, A. brevipes (E, median lobe of aedeagus; F, spermatheca; G, apical lobe of paramere). Scale bars: 0.1 mm.

FIGURE 19 Mouth parts of Amblopusa brevipes. A, labrum (right side, dorsal view; left side, ventral view (epipharynx)); B, mentum; C, labium; D, maxilla; E, right mandible. Scale bars: 0.1 mm.

FIGURE 26 Distribution and habitat of Amblopusa spp. of Japan. A, known localities in Japan (red circle, A. magna; blue square, A. pacifica; yellow triangle, A. brevipes; green inverted triangle, A. hokkaidona); B, habitat of A. magna and A. pacifica (Wakkainai-shi, Hokkaidô, photographed by Daisuke Sumikawa); C, habitat of A. magna (Abashiri-shi, Hokkaidô).