Tabla de Contenidos: :: Library Catalog

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Detalles Bibliográficos
Autores principales:	Kamimura, Yoshitaka, Cheah, Shen, Wang, Wendy Yanling, Lam, Weng Ngai
Formato:	Recurso digital
Lenguaje:
Publicado:	Zenodo 2026
Materias:	Biodiversity Taxonomy Animalia Arthropoda Insecta Dermaptera Anisolabididae Gonolabis Gonolabis sumatrana
Acceso en línea:	https://doi.org/10.5281/zenodo.19398588
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

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Gonolabis sumatrana de Bormans, 1900Figs 26–33Gonolabis sumatrana de Bormans, 1900: 452 (Sumatra).Gonolabis emarginata Srivastava, 1990: 27, figs 12–17 (Bukit Timah, Singapore). syn. nov.Literature.Burr (1902: 480) “ G. sumatrana Borm. (fig. 2. &male;). – Singapore (Biró). ”Specimens examined.ZRC • 2 &male;&male;, 2 &female;&female;, 1 nymph; Bukit Timah Hindhede Drive; Dec. 1989; H. K. Lua leg.; ZRC_DER_0000003. • 1 &female;; Lower Peirce Reservoir; 21 Jul. 1990; C. M. Yang leg.; ZRC_DER_0000006. • 1 &male;, 1 &female;; Pulau Tekong; 27 Nov. 2001; C. M. Yang, C. M. S. leg.; Under honey comb, Drain; ZRC_DER_0000024. • 1 &male;; Botanic Gardens; Jun. 1965; P. H. L. leg.; ZRC_DER_0000129. NTU • 1 &female;; Central catchment nature reserve; 10 Apr. 2023; W. N. Lam, G. K. Png, J. L. Loo leg.; Winkler extraction of leaf litter; MAC 2 F_23_1. • 1 &male;; same data as for MAC 2 F_23_1; MAC 2 F_23_2. • 1 &female;; same data as for MAC 2 F_23_1; MAC 3 U_23_1. • 1 &male;; same collection data as for MAC 2 F_23_1; 14 Apr. 2023; MAC 6 (re) F_23_1. • 1 &female;; Central catchment nature reserve; 21 Oct. 2021; W. N. Lam, G. K. Png, S. K. B. Tan leg.; Winkler extraction of leaf litter; MAC 6 F_21_1. • 1 &male;; same collection data as for MAC 6 F_21_1; 4 Oct. 2021; PEI 1 F_21_1. • 1 &male;; same collection data as for MAC 2 F_23_1; 23 May 2023; PEI 6 F_23_1. • 1 &female;; Pulau Ubin; 10 May 2023; W. N. Lam, G. K. Png, J. L. Loo leg.; Winkler extraction of leaf litter; UBI 10 U_23_1. • 1 &male;; same collection data as for UBI 10 U_23_1; 8 May 2023; UBI 1 F_23_1. • 1 &female;; same collection data as for UBI 10 U_23_1; 12 May 2023; UBI 3 U_23_2. • 1 &male;; Pulau Ubin; 17 Nov. 2021; W. N. Lam, G. K. Png, S. K. B. Tan leg.; Winkler extraction of leaf litter; UBI 7 F_21_1. • 1 &female;; same collection data as for UBI 10 U_23_1; 3 May 2023; UBI 9 U_23_1.Distribution.Peninsular Malaysia, Borneo, Sumatra, Java, Sulawesi, Singapore.Remarks.Srivastava (1990) described Gonolabis emarginata based on a single adult male specimen collected at Bukit Timah, Singapore (Figs 26–29). He noted that the species closely resembles G. sumatrana, but distinguished it by a larger body size, a slightly emarginate posterior margin of the penultimate sternite (vs broadly rounded in G. sumatrana), and parameres with a concave internal margin and rounded external angle (vs straight and obtuse). However, examination of multiple G. sumatrana specimens from Singapore revealed that the posterior margin of the penultimate sternite is nearly truncate at the middle in smaller males (Fig. 32) but tends to be concave in larger males, with the variation appearing continuous (Fig. 31). Additionally, the paramere morphology of the G. emarginata holotype (CASTYPE 16526 [CAS]) falls within the observed range of individual variation in G. sumatrana (Figs 27, 33; see also Sakai 1987). Both taxa consistently exhibit a comma-shaped sclerite within each penis lobe along with a virga (Figs 28, 34; Zacher 1911). Although Srivastava (1990) noted similarities between G. emarginata and G. oblita Burr, 1910 a, such accessory structures have not been reported for G. oblita (Burr 1915; Brindle 1980).Preliminary DNA analysis further supports the synonymy, revealing minimal genetic variation among G. sumatrana specimens from Singapore, including individuals with G. emarginata - like traits. Based on these findings, we conclude that G. emarginata represents a large-bodied variant of G. sumatrana, and we propose its treatment as a junior synonym of the latter. It is also noteworthy that G. sumatrana exhibits a sharp posterior projection on the lateral sides of abdominal segments VI through IX, with the degree of projection varying individually and typically more pronounced in larger males (Figs 29, 30). According to Burr (1915), G. oblita lacks such structures.Previous records of G. sumatrana from Borneo and Peninsular Malaysia (Borelli 1932 a, b) are based solely on female specimens, which are difficult to identify to species level and warrant further examination. However, a male specimen in the ZRC likely collected in Pahang, Peninsular Malaysia (ZRC _DER_0000008), may provide additional insights.

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