Gyrophaena (Gyrophaena) triquetra Weise, 1877

Glotov, S. V., 2022, A New Species, New Synonymy, And Additional Records Of Gyrophaena (Coleoptera, Staphylinidae, Aleocha- Rinae) From The Palaearctic Region, Zoodiversity 56 (5), pp. 373-384 : 382-384

Gyrophaena (Gyrophaena) triquetra Weise, 1877

Gyrophaena triquetra Weise, 1877: 91 .

Gyrophaena sunanica Paśnik, 2001: 191 .

Gyrophaena flammula Pace, 2007 syn. n.

M a t e r i a l e x a m i n e d. Types. Lectotype Ơ Gyrophaena triquetra (here designated): “ Japan S. Hiller / Gyrophaena triquetra W. / SYNTYPUS Gyrophaena triquetra Weise, 1877 labelled by MNHUB 2007 [red label] / LECTOTYPE Ơ Gyrophaena triquetra Weise, 1877 des. S. Glotov 2010 [red label]” (MNHB); Paralectotypes (here designated): 2 ♀, same data as in lectotype / “Original labels with Lectotype. All syntypes were mount- ed on one pin before revision. S. Glotov 2010.” [white labels] / “ PARALECTOTYPE ♀ Gyrophaena triquetra Weise, 1877 des. S. Glotov 2010” [yellow labels]” (MNHB).

G. sunanica : Holotype Ơ: “Korea [ North Korea], Sŏkam, distr. Sunan, prov. Phjongan-namdo [Pyongannamdo], 2.IX.1970, leg. R. Bielawski et M. Mroczkowski / Jnst. Zool. P.A.N. Warszawa 69/70 / HOLOTYPE Gyrophaena sunanica Paśnik, 2000 [red label] / Gyrophaena triquetra Weise, 1877 S. Glotov det. 2011 [white labels]” (MIZ); Paratypes: 5 Ơ and 5 ♀, same data as in holotype / PARATYPE Gyrophaena sunanica Paśnik, 2000 [red label] / Gyrophaena triquetra Weise, 1877 S. Glotov det. 2011 [white labels]” (ISEA).

G. flammula : Holotype Ơ: “TAIW. [ Taiwan] Kaohsiung Hs. for abv. Tona For. Sta. 1100 m, 30.IV.1998 A. Smetana [T 192] / HOLOTYPUS Gyrophaena flammula mihi det. R. Pace, 2006 [red label] / Gyrophaena flammula n. sp. det. R. Pace, 2006 [white label] / Gyrophaena triquetra Weise, 1877 S. Glotov det. 2010 [white labels]” ( MSNV).

R e d e s c r i p t i o n. Measurements of the G. triquetra lectotype (in mm): length of antenna: 0.54; head width (including eyes): 0.36; head length: 0.24; width of pronotum: 0.41; length of pronotum: 0.21; length of elytra at suture: 0.29; width of elytra (combined width of each elytron when elytra closed along suture): 0.29; total length of body (from anterior margin of labrum to posterior margin of tergite VIII): 1.5.

Coloration: head brown; pronotum pale brown; elytra yellow-brown with slightly darkened posterior angles or posterior margin; abdomen pale brown, abdominal tergites IV–VII dark brown or slightly darkened; mouthparts, antennal segments I–XI and legs yellow.

Head strongly transverse, 1.45 times as wide as long, vertex with 10 small, round, distinct punctures on each side; microsculpture dense and distinct. Antennae short; antennal segment I long and thick; segment II narrower and long but 0.71 times as long as segment I; segment III slightly elongate but narrower and shorter than segment II; segment IV small and short, strongly widened towards apex; segments V–IX transverse, slightly widened towards apex; segment X strongly transverse.

Pronotum strongly transverse, 1.50 times as wide as long and 1.14 times as wide as head; posterior angles and posterior margin of pronotal disc rounded; in middle of pronotal disc with dense, small, rounded punctures; in middle and laterally near base, with 2 moderately large, rounded punctures on each side; microsculpture dense and distinct.

Elytra 1.21 times as wide as pronotum; with dense, small, round punctuation; microsculpture dense and distinct; with sparsely distributed fine setae.

Abdomen with dense, and distinct microsculpture; abdominal tergites each, with hardly distinct, small, round punctuation; male: posterior margin of tergite VII with a row of longitudinal and narrow striae; posterior margin of tergite VIII with 2 thin, long, point- ed, weakly inward curved appendages. Female: posterior margin of tergite VIII rounded, without incision or appendages ( fig. 1 , 10). Aedeagus ( fig. 2 , 9).

D i s t r i b u t i o n. Japan, North Korea, Taiwan.

Comments. The original description of G. triquetra is based on an unspecified number of syntypes collected “an Baumschwämmen bei Hagi ( Japan)” collected by J. Weise ( Weise, 1877). Male and female syntypes were found in the collection of MNHB. The designation of the male specimen as lectotype is done for the better fixation of the identity of the name Gyrophaena triquetra Weise, 1877 .

The original description of G. sunanica is based on a holotype male from “ Korea, Sŏkam, distr. Sunan, prov. Phjongan-namdo ( North Korea)” and 16 paratypes (5 Ơ and 11 ♀) same data and place as in holotype, collected by “R. Bielawski et M. Mroczkowski” ( Paśnik, 2001). Male and female paratypes were found in the collections of ISEA and MIZ. Paśnik (2001) compared it to G. futamata ( Cameron, 1933) , but there was no reference whatsoever to G. triquetra ; the figures of the aedeagus of the holotype and paratype of G. sunanica in Paśnik (2001) are rather misleading. An examination of the holotype and paratypes revealed that it is identical of G. triquetra in external characters, as well as in the shape of the male sternite VIII and in the morphology of the aedeagus. Examination of the holotype and paratype of G. sunanica revealed that they belong to G. triquetra . I consider G. sunanica to be a junior synonym of G. triquetra .

The original description of G. flammula is based on the male holotype from “ Kaohsiung Hs. for abv. Tona For. Sta. 1100 m (Taiwan) ” collected by A. Smetana ( Pace, 2007). The holotype was found in the collection of MSNV. Pace (2007) compared G. flammula to G. taiwaspinosa Pace, 2007 , but not to G. triquetra ; the figures of the aedeagus of the holotype and paratype of G. flammula in Pace (2007) are rather misleading. An examination of the holotype G. flammula revealed that it is identical to G. triquetra in external characters, as well as in the shape of the male sternite VIII and in the morphology of the aedeagus. The synonimy of G. sunanica as a junior synonym of G. triquetra was already established before ( Kim & Ahn, 2010). I also consider G. sunanica to be a junior synonym of G. triquetra .

I thank J. Boone, J. Frisch, A. Glotova, V. Gusarov, L. Latella, O. Merkl, A. Newton, G. Schillhammer, M. Schülkeand, A. Solodovnikov, for the opportunity to work with their respective institutional and private collections, and their valuable comments on this manuscript. I also thank two anonymous referees and V. Korneyev as an editor for their thorough reading of the manuscript and their valuable criticism and corrections. The paper was prepared for publication during an extended visit to the Entomology Department of ZMUC. Funding and facilitation of the visit by A. Solodovnikov and the support from the entire ZMUC-Entomology is appreciated.

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Received 8 August 2022

Accepted 28 October 2022

Figures

Fig. 1. Abdominal tergites VIII of the male: 1 — G. anastasiarum sp.n.; 2 — G. kaunshanchiensis; 3–4 — G. hanseni; 5 — G. korbi; 6 — G. munsteri; 7 — G. pseudonana; 8 — G. pseudonitidula; 9 — G. transversalis; 10 — G. triquetra.

Fig. 2. Aedeagus: 1 — G. anastasiarum, sp. n.; 2 — G. hanseni; 3 — G. kaunshanchiensis; 4 — G. korbi; 5 — G. munsteri; 6 — G. pseudonana; 7 — G. pseudonitidula; 8 — G. transversalis; 9 — G. triquetra.