Gyrinus (s. str.) pullatus Zaitzev, 1908

Lee, Dae-Hyun & Ahn, Kee-Jeong, 2015, A taxonomic review of the Gyrinidae (Coleoptera) in Korea, ZooKeys 509, pp. 87-107 : 94-95

Taxon classification Animalia Coleoptera Gyrinidae

Gyrinus (s. str.) pullatus Zaitzev, 1908 Figs 4, 29-31, 44, 46

Gyrinus pullatus Zaitzev, 1908: 244.

Specimens examined.

SOUTH KOREA: Gyeongbuk Prov.: 1 ♂, Gyeongju-si, Jinhyeon-dong, Bulguk-temple, 23.VI.1991, SH Lee; 1 ♂, Gyeongju-si, Naenam-myeon, Hwagok-ri, 25.IV.1993, SH Lee, pond; 1 ♂ 1 ♀, Pohang-si, Nam-gu, Yeongil-eub, 22.VI.1992, SH Lee; 1 ♀, Uljin-gun, Wonnam-myeon, Maehwa-ri, Maehwa-stream, 10.VI.1995, SH Lee; 1 ♀, Yeongdeok-gun, Changsu-myeon, Changsu-ri, 5.VI.1994, SH Lee, pond; 2 ♂♂, Yeongdeok-gun, Yeonghae-myeon, 17.VI.1985, SH Lee; 15 ♂♂ 15 ♀♀, Yeongdeok-gun, Yeonghae-myeon, Myogok-ri, 6.VI.1994, SH Lee, pond (1♂, on slide).

Published Korean records.

Gyrinus pullatus : Holmen (1987: 49); Mazzoldi (1995: 159); Nilsson et al. (2001: 31); Hua (2002: 41); Mazzoldi (2003: 28); Gyrinus curtus (misidentification): Mochizuki and Tsunekawa (1937: 78); Mochizuki and Matsui (1939: 56); Kim and Nam (1982: 25); Kwon and Suh (1986: 98); Kim et al. (1994: 134); Lee (1994: 15); Cho and Park (2010: 95).

Diagnosis.

Length 6.0-7.0 mm. Ventral surface mostly reddish brown; ventral part of antennomere 2, mouthparts, prosternum, legs, posterior part of sternite VII, sternite VIII yellowish brown to brown; hypomera, epipleura yellowish brown. Ligula with a row of sparse spines on antero-medial part. Anterior margin of mesoventrite rounded and posterior margin bifid; deep pit (arrow in Fig. 29) and vertical groove present on postero-medial part; deep groove present on antero-lateral parts. Metepisternum with a deep pit (arrow in Fig. 30) on anterior part. Sternite II with pit, transverse and thick plica on anterior part (arrow in Fig. 31). Median lobe of aedeagus (Figs 50-52) narrowed apically, shorter than paramere; narrowest at anterior fifth; apical margin nearly straight; sperm-groove as in Fig. 51. Paramere as in Figs 50 and 52.

Distribution.

Asia: Korea, China (Liaoning, Jilin), Russia (East Siberia, Far East), Europe: Estonia, Finland, Russia (North European Territory), Sweden ( Mazzoldi 2003).

Remarks.

Gyrinus curtus was first recorded in Korea by Mochizuki and Tsunekawa (1937). After that, many entomologists [ Mochizuki and Matsui (1939: 56); Kim and Nam (1982: 25); Kwon and Suh (1986: 98); Kim et al. (1994: 134); Lee (1994: 15); Cho and Park (2010: 95)] reported this species in Korea, only in the local fauna without any taxonomic comments. After examining specimens (2 ♂♂, Yeongdeok-gun, Yeonghae-myeon, 17.VI.1985, SH Lee) previously studied by Kwon and Suh (1986), Kim et al. (1994), Lee (1994), and Cho and Park (2010), we found that they had been incorrectly identified and actually represent Gyrinus pullatus . This species can be distinguished from Gyrinus curtus by the hypomera being yellowish brown to brown and the apical margin of the median lobe being nearly straight.