Gastrocentrum magnum sp. nov.
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publication ID |
https://dx.doi.org/10.3897/zookeys.979.53765 |
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publication LSID |
lsid:zoobank.org:pub:BC56F2AE-D8F9-411E-9C92-81945738E264 |
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persistent identifier |
https://treatment.plazi.org/id/4907A6E5-1E07-57BA-AC57-23B0F45B41F6 |
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treatment provided by |
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scientific name |
Gastrocentrum magnum sp. nov. |
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Gastrocentrum magnum sp. nov. Figures 1 View Figures 1–9 , 10A View Figure 10 , 13 View Figure 13 , 14 View Figure 14 , 25 View Figure 25
Holotype.
India: "Inde Anglaise, Pedong, Région de Darjeeling. Chasseures indigènes, 1933 /Museum Paris, 1952, Coll. R. Oberthür / Gastrocentrum magnum sp. nov. males, Det. Yang G. Y. 2019 / Holotype: Gastrocentrum magnum sp. nov. Yang & Yang, 2020" (MNHN, male) (Fig. 1 View Figures 1–9 ). Paratypes. India: "Assam / Museum Paris ex Coll. R. Oberthur" (MNHN, 1 male); "Assam, [ …] / Gastrocentrum dux Westw. / Museum Paris ex Coll. R. Oberthur / Ex-Musaeo H. W. Bates, 1892 / Museum Paris / females" (MNHN, 1 female); "Sikkim, Guntok, Eté 1894, Chasseurs Bretandeau / Gastrocentrum dux Westw. c.f. Gahan / Museum Paris ex Coll. R. Oberthur" (MNHN, 1 female). China: China, Xizang, Mêdog, Nyingchi, Baibung, 876 m, 2016.VIII.09, light trap, LU Yanquan leg. (CCCC, 1 female); Yunnan, Longchuan, 1770 m, 2016.VI.3, light trap, YANG Xiaodong leg. 16Y (CCCC, 1 female); "Hainan, Jianfengling, Tianchi, 2010.IV.15-20/Wenxin Lin, 950 m, Collection of CHEN Changchin" (CCCC, 1 female); China, Yunnan, Honghe, Lvshuihe, 640 m, 23°1'41"N, 103°24'19"E, 07.V.2019, leg. L.Z. Meng (NKME, 3 ex., RGCM,1 ex.); China, Yunnan, Honghe, Gulinqin, 585 m, 22°43'51"N, 103°59'35"E, 07.V.2019, leg. L.Z. Meng (RGCM, 2 ex.); China, S-Yunnan, Xishuangbanna, 20 km NW Jinghong, Man Dian NNNR-office, 22°07.80N, 100°40.05E, 740 m, LFF, 24.V.2008, leg. A. Weigel (RGCM, 1 ex.). Vietnam: C-Vietnam, ThuaThien - Hue Pr., Phu Loc, Bach Ma NP, Top area, 1250-1400 m, 16°11'39"N, 107°51'12"E, 5-9.V.2019, leg. A. Weigel LFF (RGCM, 1 ex.). Thailand: 18.-23.4.1991, Dol Suthep Pui, 1300-1500 m, leg. P. Pacholatko (RGCM, 1 male).
Diagnosis.
Earlier researchers identified one of the paratypes of this new species as G. dux . The new species can be separated from G. dux by: asetiferous punctations on elytra continuing to the tip (Fig. 10A View Figure 10 ); intercoxal process of first abdominal ventrite grooved longitudinally (Fig. 20F View Figures 20–21 ); female pygidium with anterior margin notched in a shallow triangular shape (Fig. 14A View Figure 14 ), and lateral tails of spermathecal gland extremely long, ca. 2 × the length of ovipositor (Fig. 14C View Figure 14 , spglt). Gastrocentrum unicolor is sympatric with the new species in India, but G. magnum can be separated from it by much larger body size and five expanded terminal antennomeres (Fig. 13H View Figure 13 ).
Description.
General appearance: length 22-25 mm, robust, dark brown. Head: including eyes feebly broader than pronotum; eyes moderately large, distance between eyes slightly greater than the transverse diameter of eye; gular suture convergent in anterior; antennae expanded laterally from 7th antennomere onwards (Fig. 13H View Figure 13 ); vertex and frons with dense punctations, with a very faint ridge along the midline, postgenae rugose. Pronotum: oblong, length/width ratio ca. 1.5, constricted posteriorly; surface finely and densely punctate, faintly rugose, clothed with long, yellow hairs. Elytra: oblong, sides subparallel, length/width ratio ca. 2.4, vested with dense golden setae; wedge-shaped protuberance present on inner surface; asetiferous punctations rows somewhat irregular, PAP in ten rows, AAP on interspaces between 1st-2nd, 3rd-4th, and 5th-6thPAP rows; AAP present in two incomplete rows, with longitudinal spacing between neighboring punctations uneven; AAP faintly smaller than or as big as PAP, interspace between 2nd-3rdPAP rows larger than punctation diameter (Fig. 10A View Figure 10 ); both PAP and AAP beginning to decrease in size postmedially and continuing to the tip, which are quite irregular near apical 1/5 of elytra (Fig. 10A View Figure 10 ). Legs: outer apex of protibia not extending outwards. Abdomen: intercoxal process of the first ventrite grooved longitudinally. Male genitalia: pygidium subquadrate, posterior margin rounded (Fig. 13F View Figure 13 ); sixth ventrite arciform, 3 × wider than length, posterior margin well rounded, central membranous region inverted trapezoidal, extending from anterior margin to posterior margin (Fig. 13G View Figure 13 ); tegmen tubiform, length ratio of phallobasic apodeme to phallobase ca. 1: 3.7 (Fig. 13A, B View Figure 13 ); parameres hooked (Fig. 13A, a View Figure 13 ); interphallic plate shorter than half length of phallus (Fig. 13D View Figure 13 ); phallus apex knot-like, faintly longer than broad (Fig. 13C, D View Figure 13 ). Female reproductive organs: pygidium slightly wider than length, posterior margin rounded (Fig. 14A View Figure 14 ); sixth ventrite trapezoidal, 3 × wider than long, posterior margin truncated, central membranous region broad, apical accessory membranous region petty (Fig. 14B View Figure 14 ); bursa copulatrix clearly defined; spermathecal gland with a short top tail (Fig. 14C View Figure 14 , spgtt) and an extremely long lateral tail, which longer than twice length of ovipositor (Fig. 14C View Figure 14 , spglt); spermatheca curved tubiform (Fig. 14C View Figure 14 , sp).
Variation.
The female paratype collected from Hainan has the spermatheca faintly bifurcated distally. This individual variation was also observed in specimens of G. zayuense collected from the same locality (Fig. 18D-J View Figure 18 ).
Distribution.
India (Assam, Sikkim), China (Xizang, Yunnan, Hainan), Vietnam, Thailand.
Etymology.
This new species, together with G. dux , have the largest body size in this genus. The specific epithet comes from the Latin adjective magnus (=large).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.