Claassenia magna Wu 1948
Creators: name: Xiang, Ya-Nan
name: Huo, Qing-Bo
name: Du, Yu-Zhou
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Perlidae
Claassenia
Claassenia magna

description: <i>Claassenia magna</i> Wu, 1948 Figs. 1–7 Wu, 1948:146; Illies, 1966:328; Sivec <i>et al</i>., 1988:14; Du <i>et al.</i>, 1999:60; Yang <i>et al.</i>, 2018:24. <b>Adult habitus.</b> General color yellowish brown, head mostly light yellowish brown; triocellate, ocelli white, black surrounded the inner base of the circles, light brown bands connected the mid-ocellus and two posterior ocelli, anterior ocellus smaller, posterior ocelli closer to each other than to the eyes; antennae dark brown; palpi yellow brown (Fig. 1). Pronotum elliptical, middle longitudinal line were dark brown, surface rugose (Fig. 2). Legs yellow brown, femorotibial joint darker. Wings translucent, veins dark brown (Fig. 1). <b>Male</b>. Forewing length 30.5 <b>–</b> 32.2 mm, hindwing length 27.3 <b>–</b> 29.3mm, body length 27.8 <b>–</b> 29.2 mm (n = 21). Terga 1 <b>–</b> 7 simple, tergum 8 with a small round group of scattered papillae near the middle of posterior margin; mesal area of tergum 9 slightly raised, with a larger oval patch of sensilla basiconica transversally arranged (Figs. 3A–3B); tergum 10 cleft into two parts, hemitergal lobes thick and finger-shaped, rounded apically, extending to 1/3 of tergum 9 (Fig. 3C), hemitergal lobes scattered tiny sensilla basiconica (Fig. 3B). Sternum 9 transformed into broad subgenital plate with a round hammer in the middle of the posterior margin, the posterior margin of sternum 9 sclerotized and covered with long hairs (Fig. 3D). Aedeagus membranous, without any conspicuous lobes or spines, long cylinder, the base is simple, ventrally middle of aedeagus inflated to slightly spherical, both dorsally and ventrally the end slender and pointed (Figs. 4A‒4B). <b>Female</b>. Forewing length 39.6 mm, hindwing length 36.4 mm, body length 41.8 mm (n = 1), general body color darker than males but pattern similar to males (Fig. 5). Pronotum is similar in shape to males, margins and middle longitudinal line dark brown (Fig. 6A). Terga 9 <b>–</b> 10 dark brown, tergum 10 with triangular posterior projection (Fig. 6B). Sternum 8 with slight extension, subgenital plate broad and slightly protruded posteromedially, dense hairs on sternum 8, sternum 9 humped medially, the internode membrane of sterna 9 and 10 with a dense band of hairs, sternum 10 mostly pale, posterolateral margins brown (Fig. 6C). <b>Egg</b>. Length ca. 0.51 mm, width ca. 0.38 mm (n = 1). Spindle-shaped, collar wide. Chorion covered with shallow pits and without ridges (Fig. 7). <b>Material examined.</b> 8 males, 1 female, China: Fujian Province, Nanping City, Wuyi Mountains, 240 m, N 27.73512, E 117.68541, 15-V-2021, leg. Huo Qing-Bo and Zhao Meng-Yuan; 11 males, China: Guangdong Province, Shaoguan City, Nanling National Forest Park, 1010 m, N 24.92694, E 113.02167, 20-V-2021, leg. Xiang Ya-Nan; 2 males, China: Hunan Province, Chenzhou City, Mangshan National Forest Park, 500 m, N 24.98148, E 112.89213, 22-V-2021, leg. Xiang Ya-Nan. <b>Distribution.</b> China (Fujian, Guangxi, Guangdong, and Hunan Province). <b>Remarks.</b> The specimens that were collected at the type locality (Wuyi Mountain, Fujian Province) and the male described above are identical to the holotype of <i>C. magna</i>, all with a small group of sensilla basiconica on tergum 8 and a larger oval patch of sensilla basiconica on tergum 9 (Figs. 3A‒3B). Du (1999) redescribed the males based on specimens collected from Guangxi Zhuang Autonomous Region. In this study, we also examined a series from Nanling National Forest Park and Mangshan National Forest Park, which is close to Guangxi, and the morphological characteristics are consistent with <i>C. magna</i>.
description: Published as part of <i>Xiang, Ya-Nan, Huo, Qing-Bo &amp; Du, Yu-Zhou, 2022, A discussion of morphological differences within Claassenia qingzanga Xiang, Huo &amp; Du, 2022 (Plecoptera: Perlidae) based on molecular data and a redescription of C. magna Wu, 1948, pp. 287-294 in Zootaxa 5141 (3)</i> on pages 288-292, DOI: 10.11646/zootaxa.5141.3.6, http://zenodo.org/record/6592801
description: {"references": ["Wu, C. F. (1948) Fifth supplement to the stoneflies of China (Order Plecoptera). Bulletin of the Peking Society of Natural History, 17 (2), 145 - 151.", "Illies J. (1966) Katalog der rezenten Plecoptera. Das Tierreich, Berlin, 82, 328.", "Sivec, I., Stark, B. P. &amp; Uchida, S. (1988) Synopsis of the world genera of Perlinae (Plecoptera: Perlidae). Scopolia, 16, 1 - 66.", "Du, Y. Z. (1999) A taxonomic study on Plecoptera from China. Unpublished Postdoctoral Dissertation, Zhejiang University, Hangzhou, 324 pp.", "Yang, D. &amp; Li, W. H. (2018) Species Catalogue of China. Vol. 2. Animals, Insecta (III), Plecoptera. Science Press, Beijing, 49 pp."]}