Paramblopusa borealis (Casey, 1906)

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 : 283

Paramblopusa borealis (Casey, 1906)

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

( Figs. 21A–D ; 22 )

Amblopusa borealis Casey, 1906: 355 (original description; type locality: Queen Charlotte Island (Massett )).

Paramblopusa borealis Ahn & Ashe, 1996: 151 (redescription); Ahn & Maruyama, 2000: 364 (characters).

Material examined. Japan: Hokkaidô: 1 male, 1 female, 8 unsexed, Otaru-shi, Oshoro, 18. IV. 2020, S. Hori; 1 unsexed, Otaru-shi, Shukutsu , 4. IV. 2020, Y. Tasaku (cYT) ; 1 male, Hakodate-shi, Toyosaki-chô , 12. IV. 2020, K. Mitsuhashi (cYT) ; 2 males, 2 females, 8 unsexed, 12. IV. 2020, D. Sumikawa & Y. Tasaku (cYT) ; 1 male, 9 unsexed, Hamanaka-chô, Mochirippu, Mochirippu-numa , 17. IX. 2020, Y. Tasaku (cYT) ; 180 unsexed, ditto, 12. IX. 1999, M. Maruyama ( KUM) ; 1 unsexed, Betsukai-chô , Odaitô , 23. VII. 2020, Y. Tasaku (cYT) ; 1 male, Akkeshi-chô, Akkeshi-ko , 3. VIII. 2022, Y. Tasaku (cYT) ; 1 unsexed, Nemuro-shi, Onnetô, 18. IX. 2020, Y. Tasaku (cYT) ; 10 unsexed, Nemuro-shi, Shunkunitai, 18. IX. 2020, Y. Tasaku (cYT) ; 24 unsexed, ditto, 11. IX. 1999, M. Maruyama ( KUM) ; 5 unsexed, Samani-chô, Horoman, 2. V. 2023, D. Sumikawa (cYT) .

Diagnosis. This species can be distinguished from other liparocephaline species by the combination of the following characteristics: body slender, head almost circular, abdominal segments III–VII almost parallel-sided ( Fig. 21A ); eyes present; labial palpus 3-segmented and segment II thinner than I ( Fig. 22C ).

Habitat. Adults were collected on gravel beaches and under stones on mudflats.

Distribution. Japan: Hokkaidô; Canada; USA: Alaska, Oregon, Washington.

Figures

FIGURE 21 Habitus & genitalia of Paramblopusa spp. A–D, P. borealis; E–H, P. sumikawai sp. n. A & E, Habitus; B & F, median lobe of aedeagus; C & G, spermatheca; D & H, apical lobe of paramere. Scale bars: 1.0 mm for A & E; 0.1 mm for B–D, F–H.

FIGURE 22 Mouth parts of Paramblopusa borealis. A, labrum (right side, dorsal view; left side, ventral view (epipharynx)); B, mentum; C, labium; D, maxilla; E, right mandible. Scale bar: 0.1 mm.