Colasia akisoides Koch, 1965

Bai, Xing-Long, Liu, Jing-Ze & Ren, Guo-Dong, 2023, Revision of the genus Colasia Koch, 1965 (= Belousovia Medvedev, 2007, syn. nov.) (Coleoptera, Tenebrionidae, Blaptini), ZooKeys 1161, pp. 143-167 : 143

Colasia akisoides Koch, 1965

Figs 1-4 , 5 , 28 , 29 , 33

Colasia akisoides Koch, 1965: 131; Medvedev 2001: 95; Löbl et al. 2008: 231; Ren et al. 2016: 333; Nabozhenko and Chigray 2020: 285.

Type material.

Lectotype, designated here: ♂ (HNHM), Giufu-Shan / Szechuan / Em. Reitter // depressa // Paratypus 1965 / Colasia akisoides / C.Koch // Colasia / Colasia akisoides C.Koch / Dr Z. Kaszab det., 1974 // LECTOTYPE / Colasia akisoides / Koch, 1965 / design. Bai, Liu, Ren, 2022 (Figs 1-4 ). Paralectotypes: 1♀ (HNHM), ♀ // Giufu-Shan / Szechuan / Em. Reitter // depressa // Paratypus 1965 / Colasia akisoides / C.Koch // Paralectotype / Colasia akisoides / Koch, 1965 / design. Bai, Liu, Ren, 2022; 1♀ (HNHM), ♀ // Kinfushan / Prov. Szechuan / West-China IV/V 29 / Coll.,H.Becker // depressa // Paratypus 1965 / Colasia akisoides / C.Koch // Paralectotype / Colasia akisoides / Koch, 1965 / design. Bai, Liu, Ren, 2022.

Additional material.

China: 1♂ (HBUM), 2015.VII.10 / 1665 m / North Slope of Jinfo Shan, Nanchuan District , Chongqing / 29°02'34"N / leaf litter / 107°11'10"E / Ri-Xin JIANG leg. / Mianyang Normal University, MYNU ; 2♀ (HBUM), 2022.VI.30-VII.3 / Shangding, North Slope of Jinfo Shan , Chongqing / 2000 m / Tian-Xuan GU leg. / Hebei University Museum .

Distribution.

China: Chongqing.

Remarks.

This species was described based on the collection of Muséum national d’Histoire naturelle, Paris, France ( Koch 1965), including ten specimens from China in the original description: "2♂♂ 2♀♀ <<Giufu-Shan, Szechuan>>! leg. Emm. REITTER; 1♂ 4♀♀, Kintushan, Prov. Szechuan, West-China>>! leg. BECKER; 1 ♀ <<Junan, Junan-fu>>!".

In January 2017, the first author had a chance to visit the Muséum national d’Histoire naturelle, but no types of this species have been found. In May 2022, XB asked Dr. Antoine Mantilleri (curator for Coleoptera at the MNHN) for help in searching for the types of this species. No such specimens were identified. Fortunately, three syntypes (1♂, 2♀) of this species were founded in HNHM and lent us to study by late Dr. Ottó Merkl. Therefore, the male type deposited in HNHM is designated as the lectotype in this paper, and the remaining types becoming paralectotypes.

The identification of the female paralectotype from Junan-fu (most likely Kunming City), Junan (Yunnan) is in doubt. On the one hand, according to the distribution of all the species of the revised genus Colasia , it is unlikely to be C. akisoides . On the other hand, it was once identified as Asidoblaps glyptoptera by Gebien ( Koch 1965). Recently, we have obtained some specimens from Kunming, Yunnan, and they were confirmed to be Asidoblaps sp. after the identification. These specimens superficially resembled representatives of Colasia , but were obviously different by aedeagal morphology. Thus, we speculate that the female paralectotype from Yunnan belongs to the Asidoblaps species.

Giufu-Shan and Kinfushan (sometimes erroneously spelled Kintushan) both refer to the current Jinfo Shan ( Bezděk et al. 2015; Kataev and Liang 2015; Ge et al. 2021). Jinfo Shan is located in southern Chongqing, Chongqing once belonged to Sichuan Province, and now it is a municipality directly under the Central Government. Thus, the type locality of this species is Jinfo Shan, and the distribution of this species should be changed from Sichuan and Yunnan ( Löbl et al. 2008; Ren et al. 2016; Nabozhenko and Chigray 2020) to Chongqing.

Redescription.

Body black, weakly shiny; legs shiny.

Male. Head. Apical maxillary palpomere triangular, covered with moderately dense and long setae. Anterior margin of labrum emarginate, lateral margins weakly arcuate. Anterior margin of epistoma emarginate; surface flat, matte, inconspicuous punctate. Frontoepistomal suture shallow and arcuate. Dorsal surface of head flat, matte, sparsely and finely granulated. Genal margins arcuately converging forwards, densely and shallowly punctures merged into short wrinkles. Emargination of outer margins of head above antennal base straight. Eyes transverse, not protruding beyond contour of head, distance between outer margins of eyes represent the widest of head; height 0.53 mm, width 0.17 mm from lateral view, respectively (height 3.1 × width; 2.5 × if the height and width rounded to one decimal place). Temples arcuately narrowing backwards, weakly granulated. Antennae slender and long, with the last segment reaching beyond pronotal base; basal part of antennomere I invisible in dorsal view; II-VII cylindrical, thicker at apex, II very short, III very long, V-VI equal in length, longer than IV and shorter than VII; VIII-X nearly spherical; XI sharped-oval.

Prothorax. Pronotum cordiform, widest at middle, 1.5 × wide as long, 1.8 × wide as head, ratio of width at anterior margin to middle and base 7: 11: 8; anterior margin deeply emarginate, beaded laterally; lateral margins weakly “S” curved, entirely beaded and smooth; posterior margin straight at middle, beaded laterally; anterior angles rectangular and protruding forwards, posterior angles rectangular; surface matte, central convex, lateral sides weakly depressed along lateral margins, with shallowly and rounded depressions in sides of central, moderately depressed near posterior angles in sides of base, longitudinal median line (median depression in Medvedev 2007) smooth and inconspicuous; shallowly, sparsely and finely punctate in central part, near posterior margin, lateral margins, and lateral sides of anterior margin with wrinkly punctures, sparsely and finely granulated. Prothoracic hypomera depressed, densely and shallowly wrinkled in longitudinal, with sparse and tiny granules. Prosternal process sharply sloping downwards behind procoxae, apex blunt in lateral view.

Pterothorax. Elytra oval, widest at middle, 1.3 × long as wide, 1.3 × wide as pronotum; base nearly as wide as pronotal base; dorsal surface matte, weakly convex, declivity sharply sloping downwards; humeral carinae smooth, with very sparse, smooth and large tubercles, sparse and fine granules, sparse, coarse and shallow wrinkles between humeral carinae; each elytron with two carinae (sensu Medvedev 2007) between suture and humeral carina, the second carina inconspicuous; declivity with sparse and short setae, slightly convex along suture; surface of epipleuron (sensu Kamiński et al. 2019) matte, edge relatively wide; pseudopleuron (outer part of elytra in Medvedev 2007) much wider than epipleuron, surface matte, with sparse and inconspicuous granules, edge thin and elevated, reaching sutural angle. Scutellum triangular, covered by pronotum.

Abdomen. Apex of ventrite 1, and base of ventrite 2 flat in middle; ventrites 1, 2, and anterior part of ventrite 3 rough, with moderately dense and long setae, and inconspicuous granules, densely, shallowly, and finely wrinkled at sides; posterior part of ventrite 3 smooth, shallowly punctate; ventrite 4 smooth, shallowly and finely punctate; last ventrite smooth, with sparse, fine punctures and short setae, apical margin widely rounded.

Legs. Slender and long. Femora claviform, mesofemora slightly longer than profemora, and shorter than metafemora. Protibiae weakly curved, distal part distinctly thick; mesotibiae and metatibiae straight, both gradually widened toward apex; distal part of metatibiae with a row of golden yellow hairy row on inner side. Ventral surface of pro- and mesotarsomeres I-IV, and metatarsomeres I-III with undeveloped hairy tuft at apex.

Aedeagus. Length 1.8 mm, width 0.5 mm. Parameres length 0.5 mm, width 0.4 mm. Parameres relatively wide and short, widest at base, basal 1/4 parallel, and then narrowing toward apex nearly straight, distal part weakly curved to ventral side in lateral view.

Female. Antennae not reaching pronotal base; elytra wider and more convex; abdominal ventrites 1 and 2 convex; inner side of metatibiae without golden yellow setae; other characters similar to male.

Measurements.

Body length: 11.5-13.5 mm; width: ♂ 5.5-6.0 mm, ♀ 6.5-7.0 mm.

Figures

Figure 5. Characters of Colasia akisoides Koch, male, lectotype A head B antenna C pronotum D protibia E protarsus F mesotarsus (mesotarsomeres III-V are missing) G metatibia G ' distal part of metatibia H metatarsus I, J aedeagus in dorsal and lateral view, respectively. Scale bars: 1.0 mm.

Figure 33. Distribution of the species of the revised genus Colasia (known to occur only in the south of the Yangtze River).

Figures 1 - 4. Habitus and type labels of Colasia akisoides Koch 1 - 3 lectotype, male in 1 dorsal 2 lateral, and 3 ventral views 4 type labels. Scale bar: 3.5 mm.

Figures 28 - 32. Habitats of Colasia akisoides Koch 28 photograph by Ri-Xin Jiang 29 photograph by Tian-Xuan Gu. C. pilosa sp. nov. 30 female, photograph by Lu Qiu 31 male, photograph by Tian-Long He 32 photograph by Tian-Long He.