Pseudatheta cooteri Pace, 1998

Hashizume, Takuto, Yamamoto, Shûhei & Maruyama, Munetoshi, 2023, Revision of the Genera Pseudatheta Cameron and Phymatura Sahlberg (Coleoptera, Staphylinidae, Aleocharinae) from Japan, Zootaxa 5319 (1), pp. 27-47 : 38

publication ID

https://doi.org/ 10.11646/zootaxa.5319.1.2

publication LSID

lsid:zoobank.org:pub:45CD8E29-3320-42E2-A8A8-3A36BC0F41CE

DOI

https://doi.org/10.5281/zenodo.8182140

persistent identifier

https://treatment.plazi.org/id/090C879D-FFEB-8E12-899A-FDB0AB3FFE0B

treatment provided by

Plazi

scientific name

Pseudatheta cooteri Pace, 1998
status

 

Pseudatheta cooteri Pace, 1998 View in CoL

( Figs. 1E View FIGURE 1 , 7A–D View FIGURE 7 )

[Japanese name: Minami-hime-kinokotsuyakeshi-hanekakushi]

Pseudatheta cooteri Pace, 1998: 208 View in CoL (original description;

type locality: “ China, Jiangsu Prov., Nanjing Zijinshan”): Schülke & Smetana, 2015: 634 (catalogue); Pace, 2016: 301 (Yunnan).

Material examined. JAPAN: [Kagoshima-ken]: Yaku-shima Is.: 1 male, Aiko-dake, Yakushima-chô , 25 IX–23 X 2006, T . Yamauchi et al. leg, ( KUM); 1 male, 2 females, Kurio, Yakushima-chô , 21 VII 2021, T . Hashizume leg. ( KUM); [Okinawa-ken]: Okinawa-jima Is.: 2 males, Takazato, Ôgimi-son, 3 XI 1993, M. Kimura leg. ( KUM); 2 males, Yona , 25–27 V 1974, M. Sato leg. ( KUM); Iriomote-jima Is.: 2 males, 2 females, Kampiree , 27 III 1984, S. Nomura leg. ( KUM) .

TAIWAN: 3 males, Wulai, Taipei Hsien, 17 V 1972, M, Sakai leg. ( EUM) .

Redescription. Measurements (n = 5): BL ≈ 1.65–1.84; FBL, 0.91–1.00; HL, 0.28–0.34; HW, 0.35–0.39; PL, 0.31–0.35; PW, 0.46–0.50; EL, 0.30–0.35; EW, 0.55–0.60.

Relative length of antennomeres I–XI (n = 1): 25: 27: 19: 10: 10: 10: 11: 11: 13: 13: 35. Ratio of length/width of antennomeres I–XI (n = 1): 1.94: 2.21: 1.80: 0.87: 0.66: 0.64: 0.59: 0.58: 0.63: 0.61: 1.62.

Body ( Fig. 1E View FIGURE 1 ) reddish brown; head darker; elytra dark brown except for the anterior 1/4–1/3; abdominal segments V–VI darker.

Head slightly transverse, HW/HL: 1.12–1.36; surface densely covered with setae. Antenna with antennomeres I–III and XI longer than wide, antennomeres IV–X wider than long; antennomeres I and II with rounded distal end, antennomeres III–X strongly angulated near distal end, antennomere XI oval.

Pronotum transverse, PW/PL: 1.43–1.50, PW/HW: 1.29–1.33; surface densely covered with setae, finely punctured, without microsculpture; posterior margin arcuate. Elytra wider than long, EW/EL: 1.71–1.84, EL/PL: 0.92–1.00, EW/PW: 1.13–1.24; surface densely covered with setae and finely punctured; posterior margin sinuate near posterolateral corners. Mesoventrite without longitudinal carina; mesoventral process extended to slightly beyond middle of mesocoxal cavities, with pointed apex; metaventral process shorter than mesoventral process, with rounded apex; isthmus absent.

Abdomen slightly narrowed posteriad; surface densely covered with setae.

Male. Elytra with a pair of small tubercles at about posterior 1/3 on sutural margin. Tergite VII with a tubercle on anteromedian area. Tergite VIII ( Fig. 7A View FIGURE 7 ) with a tubercle on median area; six processes on posterior margin. Aedeagus as in Fig. 7C View FIGURE 7 ; median lobe with large basal bulb; apical process elongated, simply curved ventrally, slightly widened at basal part; ventral process large, apex pointed, with a distinct angle on dorsa side; flagellum very long.

Female. Spermatheca ( Fig. 7D View FIGURE 7 ) curved twice; distal portion large, nearly conical shape, slightly curved; median portion elongate, curved; proximal portion very small.

Distribution. Japan (Yaku-shima Is., Okinawa-jima Is., Iriomote-jima Is.), Taiwan —new record; China (Jiangsu, Yunnan).

Remarks. We report the first discovery of males of Ps. cooteri and describe them here. Variations in the shape of the ventral process of the median lobe of the aedeagus were observed ( Fig. 7B View FIGURE 7 ). The aedeagus and spermatheca of Ps. spinosa , a species from Taiwan described by Pace (2008), are similar to those of Ps. cooteri . However, judging from the illustrations in that report, Ps. cooteri can be distinguished from Ps. spinosa by the longer apical process of the median lobe of its aedeagus and by the longer, weakly curved distal portion of the spermatheca. We were able to examine specimens of Pseudatheta from Taiwan and found that the aedeagi were identical to those of Ps. cooteri from Japan. We consider the former specimens to be Ps. cooteri from Taiwan, although we were unable to compare the spermathecae because females were not collected with the male specimens. While it is possible that the two species are distributed in Taiwan, the slight differences may have instead been due to intraspecific variation, deformation of the specimens, or misinterpretations in sketching. Therefore, we cannot rule out the possibility that these two species are synonyms.

T

Tavera, Department of Geology and Geophysics

KUM

Resource Management Support Center

V

Royal British Columbia Museum - Herbarium

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Staphylinidae

SubFamily

Aleocharinae

Tribe

Homalotini

SubTribe

Bolitocharina

Genus

Pseudatheta

Loc

Pseudatheta cooteri Pace, 1998

Hashizume, Takuto, Yamamoto, Shûhei & Maruyama, Munetoshi 2023
2023
Loc

Pseudatheta cooteri

Pace, R. 1998: 208
1998
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