New Records of Six Staphylinid Species (Coleoptera: Staphylinidae) from Coastal Habitats in Northeastern Russia
Examination of staphylinid specimens (Coleoptera: Staphylinidae) deposited in the Chungnam National University Insect Collection (Daejeon, Republic of Korea) yielded 6 species previously unreported from northeastern Russia. All 6 were collected from coastal environs and included Adota magnipennis (Bernhauer), Atheta ririkoae Sawada, A. tokiokai (Sawada), Cafius histrio (Sharp), Halorhadinus inaequalis Sawada, and Medon prolixus (Sharp). A taxonomic key to the 16 genera found in that area of Russia is offered along with a preliminary checklist of 21 species in these 16 genera.
Frank and Ahn (unpubl. data) have previously recorded 15 species representing 11 genera of staphylinid beetles (Coleoptera: Staphylinidae) inhabiting seashore environs in northeastern Russia. Examination of coastal staphylinids deposited in the Chungnam National University Insect Collection (CNUIC, Daejeon, Republic of Korea) yielded 5 additional genera including 6 species that were not previously reported from Russia. All were collected under plant debris including seaweeds in the high tide region. Herein, we document Adota magnipennis (Bernhauer), Atheta ririkoae Sawada, A. tokiokai (Sawada), Cafius histrio (Sharp), Halorhadinus inaequalis Sawada, and Medon prolixus (Sharp) as new records for the Russian fauna. We also provide a key to 16 genera of coastal-inhabiting staphylinids along with a preliminary checklist of the species of coastal staphylinids of northeastern Russia.
List of New Records of the Coastal Staphylinidae in Northeastern Russia
Habitus illustrations are presented in Fig. 1 with a distribution map in Fig. 2.
Citation: Journal of Entomological Science 46, 1; 10.18474/0749-8004-46.1.62
Citation: Journal of Entomological Science 46, 1; 10.18474/0749-8004-46.1.62
Adota magnipennis (Bernhauer) Specimen examined. 1 (CNUIC), Sakhalin, Yuzhno-Sakhalinsk, Okhotskoye, N46°51′129.16″ E143°09′49.74″, 5m, 17 VII 2008 TK Kim, under seaweeds
Distribution. Russia (Far East), Korea, Japan
Atheta ririkoae Sawada Specimens examined. 4 (CNUIC), RUSSIA: Primorsky Krai, Khasansky district, Kedrovyy, N43°01′17.0″ E131°33′36.7″, 22 VI 2008, JG Lee, TK Kim, under seaweeds
Distribution. Russia (Far East), Korea, Japan
Atheta tokiokai (Sawada) Specimens examined. 8 (CNUIC), RUSSIA: Primorsky Krai, Khasansky district, Kedrovyy, N43°01′17.0″ E131°33′36.7″, 5m, 22 VI 2008, JG Lee, TK Kim, under seaweeds
Distribution. Russia (Far East), Korea, Japan
Cafius histrio(Sharp) Specimens examined. 4 (CNUIC), RUSSIA: Primorsky Krai, Khasansky district, Kedrovyy, N43°01′17.0″ E131°33′36.7″, 5m, 22 VI 2008, JG Lee, TK Kim, under seaweeds
Distribution. Russia (Far East), Korea, Japan
Halorhadinus inaequalis Sawada Specimen examined. 1 (CNUIC), RUSSIA: Primorsky Krai, Khasansky district, Kedrovyy, N43°01′17.0″ E131°33′36.7″, 5m, 22 VI 2008, JG Lee, TK Kim, under seaweeds
Distribution. Russia (Far East), Korea, Japan
Medon prolixus (Sharp) Specimens examined. 18 (CNUIC), RUSSIA: Primorsky Krai, Khasansky district, Kedrovyy, N43°01′17.0″ E131°33′36.7″, 5m, 22 VI 2008, JG Lee, TK Kim, under seaweeds
Distribution. Russia (Far East), Japan
A Key to Coastal Staphylinid Genera of Northeastern Russia
The key was modified from Ahn (2001), Gusarov (2003), Naomi (1982), Newton et al. (2001), and Smetana (1995). A species checklist is provided in Table 1.
1(a). Antennae inserted posterior to a line drawn between anterior margins of eyes__________________________2
(b). Antennae inserted anterior to a line drawn between anterior margins of eyes__________________________11
2(a). Tarsal formula 5-5-5__________________________3
(b). Tarsal formula 4-5-5 or 4-4-5__________________________4
3(a). Maxillary palpi and labial palpi with pseudopalpomere__________________________Aleochara Gravenhorst
(b). Maxillary palpi and labial palpi without pseudopalpomere__________________________Oreuryalea Assing & Maruyama
4(a). Tarsal formula 4-5-5__________________________5
(b). Tarsal formula 4-4-5__________________________8
5(a). Neck present; pronotum with a slight medial longitudinal impression; pronotum broadest subapically, narrowed behind to a base__________________________Myrmecopora Saulcy
(b). Neck absent; pronotum without impression; pronotum shape different__________________________6
6(a). Isodiametric microsculpture absent on body; anterior margin of the labrum straight; basal impression absent on tergite VI__________________________Atheta Thomson
(b). Isodiametric microsculpture present on entire body; anterior margin of the labrum concave; basal impression present on tergite VI__________________________7
7(a). Antennomere 2 longer than 3, 8 - 10 slightly transverse; tarsi with one empodial seta; equal length of claws; smaller species, 2.2 - 3.2 mm__________________________Adota Casey
(b). Antennomere 2 at least as long as 3, 8 - 10 elongate or subquadrate; tarsi without empodial seta; different length of claws; larger species, 3.0 - 5.0 mm__________________________Psammostiba Yosii & Sawada
8(a). Hind wings present; elytra longer than pronotum__________________________Halorhadinus Sawada
(b). Hind wings absent; elytra shorter than pronotum__________________________9
9(a). Median tooth of right mandible not triangular; anterior margin of abdominal tergites III–VI deeply and broadly V-shaped__________________________Amblopusa Casey
(b). Median tooth of right mandible triangular; anterior margin of abdominal tergites III–VI straight__________________________10
10(a). Mentum triangular, deeply incised with V-shaped emargination at apex; ratio of pronotal length to elytral length less than 1.3; length of metaventrite almost same as mesocoxal width__________________________Paramblopusa Ahn & Ashe
(b). Mentum more or less trapezoidal; ratio of pronotal length to elytral length more than 1.3; length of metaventrite shorter than half of mesocoxal width__________________________Liparocephalus Mäklin
11(a). Pronotum with large, opaque postcoxal process; gular sutures closest at middle or more posteriorly__________________________Medon Stephens (Paederinae)
(b). Pronotum without postcoxal process or with small translucent process; gular sutures different from above__________________________12 (Staphylininae)
12(a). Labium with ligula entire, rounded or slightly sinuate apically, smaller species, less than 10.0 mm__________________________Cafius Stephens
(b). Labium with ligula distinctly notched apically; large species, more than 11.0 mm—13
13(a). Front tibia without spines on the outer edge__________________________Phucobius Sharp
(b). Front tibia with spines on the outer edge__________________________14
14(a). Hind wings short, vestigial; metaventrite very short__________________________Hadropinus Sharp
(b). Hind wings present; metaventrite long__________________________Liusus Sharp
Habitus: (A) Adota magnipennis, 2.2 mm; (B) Aleochara (Emplenota) puetzi, 4.6mm; (C) Amblopusa magna, 4.8 mm; (D) Atheta tokiokai, 3.2 mm; (E) Halorhadinus inaequalis, 4.5 mm; (F) Medon prolixus, 4.4 mm; (G) Cafius histrio, 9.1 mm; (H) Liusus humeralis, 14.2 mm; (I) Philonthus nudus, 7.8 mm.
Distribution map of coastal staphylinids in northeastern Russia. Letters indicate: (A) Primorie Territory, Aleochara (Emplenota) puetzi, A. (Triochara) zerchei, Amblopusa magna, Atheta ririkoae, A. tokiokai, Halorhadinus inaequalis, Myrmecopora (Lamproxenusa) reticulata, Oreuryalea watanabei, Psammostiba jessoensis, Medon prolixus, Cafius histrio, Phucobius simulator; (B) Sakhalin, Adota magnipennis, Aleochara (Emplenota) puetzi, A. (Triochara) nubis, A. (T.) zerchei, Oreuryalea watanabei, Hadropinus fossor, Liusus hilleri, L. humeralis; (C) Kuril Islands, Amblopusa magna, Liparocephalus litoralis, Paramblopusa eoa, Psammostiba kamtschatica, Philonthus nudus; (D) Kamchatka, Aleochara (Emplenota) puetzi, A. (Triochara) nubis, Psammostiba kamtschatica.
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