http://www.paper.edu.cn Zootaxa 1582: 19–25 (2007) ISSN 1175-5326 (print edition) www.mapress.com/zootaxa/ ZOOTAXA Copyright © 2007 · Magnolia Press ISSN 1175-5334 (online edition) One new species of scorpion belonging to the genus Euscorpiops Vachon, 1980 from South China (Scorpiones: Euscorpiidae, Scorpiopinae) MING-SHENG ZHU 1 , LU ZHANG 1 & WILSON R. LOURENÇO 2 1 College of life sciences, Hebei University, Baoding, Hebei 071002, China: 2 Département de Systématique et Evolution, USM 0602, Section Arthropodes (Arachnologie), Muséum national d’Histoire naturelle, CP 053, 61 rue Buffon 75005 Paris, France: e-mail: [email protected] * Corresponding author, Ming-Sheng ZHU e-mail: [email protected] Abstract A new species of scorpion, Euscorpiops yangi sp. nov. (Euscorpiidae) is described from Maguang County, Yunnan Prov- ince, China. The new species can be characterized by 18 external trichobothria (5 eb, 2 esb, 2 em, 4 est, 5 et) and 9 to 10 ventral trichobothria in the pedipalp patella; a narrow and elongated chela with a length vs width ratio equal to 3.4 on males and 3.3 on female; cheliceral movable finger with 5 basal teeth on ventral edge. Key words: scorpion, taxonomy, Euscorpiops, new species, Yunnan Provence, China Introduction The genus Scorpiops Vachon, 1980, subfamily Scorpiopsinae Kraepelin, 1905, formerly included in the fam- ily Vaejovidae Thorell, 1876 was revised by Vachon (1980) who proposed three subgenera, Alloscorpiops, Euscorpiops and Neoscorpiops, in addition to the nominotypical subgenus Scorpiops. The subgenus Euscor- piops was distinguished from the subgenus Scorpiops by the number of external trichobothia on the pedipalp patella: 18–20 in Euscorpiops compared with 17 in Scorpiops. Lourenço (1998) raised the subgenus Euscor- piops to genus level and the subfamily Scorpiopsinae to family level, Scorpiopidae. Soleglad & Sissom (2001) downgraded Scorpiopidae again to subfamily level, and placed it in the family Euscorpiidae. These authors also amended the diagnosis of the genus Euscorpiops on the basis of the position of chela trichoboth- ř ium Eb3, in relation to the position of trichobothria Dt and Est. Subsequently, Kova ík (2005) described three new species, and proposed a key for the genus Euscorpiops. The genus Euscorpiops is a small group of scorpions comprising 15 species with a narrow distribution in Southwest Asia including India, Vietnam, Laos, Burma, Bhutan, Thailand and China (Tikader & Bastawade, 1983; Kovařík, 2000, 2004, 2005; Zhu, Qi & Lourenço, 2005). Four species have been recorded from China: Euscorpiops novaki Kovařík, 2005 (Tibet), Euscorpiops vachoni Zhu, Qi & Lourenço, 2005 (Yunnan); Eus- corpiops karschi Lourenço, Zhu & Qi, 2005 (Tibet) and Euscorpiops shidian Zhu, Qi & Lourenço, 2005 (Yunnan). The recent study of several scorpions collected in Yunnan Province, China, revealed a new species, Eus- corpiops yangi sp. nov., which is the fifth species of the genus Euscorpiops to be recorded from China. Accepted by L. Prendini: 9 Jul. 2007; published: 12 Sept. 2007 转载 19 中国科技论文在线 http://www.paper.edu.cn Material and methods Illustrations and measurements were produced using a TTL-II stereomicroscope with an Abbe drawing device and an ocular micrometer. Measurements follow Stahnke (1970) and are given in mm. Trichobothrial nota- tions follow Vachon (1974) and morphological terminology mostly follow Hjelle (1990). Terminology of metasomal carination follow Vachon (1952) and terminology of pedipalp chelal carinae follow Prendini (2000) and Soleglad & Sissom (2001).Type series of the new species is deposited in the Museum of the Col- lege of Life Sciences, Hebei University (MHU). One paratype male is deposited in the Muséum national d’Histoire naturelle, Paris, France (MNHN). Taxonomic treatement Family Euscorpiidae Laurie, 1896 Subfamily Scorpiopinae Kraepelin, 1905 Euscorpiops Vachon, 1980 Scorpiops (Euscorpiops) Vachon, 1980: 151 (in part). Tikader & Bastawade, 1983: 452 (in part). Euscorpiops Lourenço, 1998: 246 (in part). Fet et al., 2000: 491. Soleglad & Sissom, 2001: 93. Lourenço, 2005: 14. Kovařík, 2005: 1. Type species: Scorpiops asthenurus Pocock, 1900. Diagnosis: Trichobothrium Eb3 on the external surface of the chela is located between trichobothria Dt and Est. Telson presents an annular ring at the juncture of the vesicle with aculeus. Three pairs of lateral eyes. 17– 21 external and 7–18 ventral trichobothria on pedipalp patella. Ventral surface of manus with 4 trichobothria. Euscorpiops yangi sp. nov. (Figs 1–22) Type material: Male holotype, CHINA: Yunnan Province, Maguang County, Gulingqing Town, 23°00´N, 104°18´E, 20/VII/2006, Zi-Zhong Yang and Yu-Lung Wang leg. (Ar.-MHU-0011); 3 males and 1 female paratypes, same data as for holotype (1 male paratype in MNHN, the others in MHU). Diagnosis: Medium-sized scorpion with total length 46.1 to 51.3, and can be easily distinguished from other species of the genus Euscorpiops, and in particular from Euscopiops vachoni and Euscorpiops shidian by the following features: (1) patella of pedipalp with 9 to 10 ventral trichobothria, whereas in E. shidian 11 are present; (2) pectinal tooth number is 5 to 7, E. vachoni has 7 to 8; (3) chela narrow and elongated; the ratio between length and width is 3.4 on males and 3.3 on female, whereas in E. vachoni it is respectively 1.5 and 1.9 and in E. shidian it is 1.6 and 2.7; (4) cheliceral movable finger with 5 basal teeth on ventral edge, both E. vachoni and E. shidian present a higher number of basal teeth than the new species. Etymology: The specific name is a patronym in honor of Dr. Zi-Zhong Yang, Dali University, Yunnan, China, who collected the type material. Description based on male holotype and female paratype Coloration. Body dark brown. Carapace dark brown.Tergites dark brown with pale spots. Appendages blackish-brown. Telson reddish-brown with four longitudinal yellowish-brown stripes, Vesicle blackish- brown with the end of the aculeus dark reddish. Pedipalp dark brown. Chela manus and fingers blackish. Legs reddish-brown with pale patches except tarsi, tarsi yellowish-brown. Sternites yellowish-brown, sternum brownish. 20 · Zootaxa 1582 © 2007 Magnolia Press ZHU ET AL. 中国科技论文在线 http://www.paper.edu.cn FIGURE. 1. Euscorpiops yangi sp. nov. Male holotype, dorsal view. Scale = 2mm. Morphology. The entire carapace is granulated except for anterior paler areas; anterior granules larger than the posterior ones; carinae absent. Lateral and posterior median furrows distinct but shallow. Median ocular tubercle smooth, forming a conspicuous promontory with one pair of small median eyes, located ante- riorly to the centre of the carapace (Fig. 1). Lateral ocular tubercles each with three ocelli. Mesosoma covered with minute granulations on the dorsal surface (Fig. 1); tergites I to III without carinae, tergites IV to VI each with one vestigial median carina, tergite VII bears a very weak median and two pair of lateral carinae. Ster- num and sternites III to VI are smooth except for sternite VII, which has a few granules on lateral surfaces and no distinct carina. Pectinal tooth count 7–7 in male holotype and 5–6 in female paratype (Figs. 6, 13). Metaso- mal segments II to V longer than wide , segment I wider than long; segments I and II with a few granules strongly marked; segments I to V have 10-8-8-8-7 carinae; All dorsaldor, solateral and ventrolateral carinae of segments I to IV are serrated, but dorsolateral carinae of segment V are weak, other carinae are granular. Ves- icle is smooth with a few setae (Fig. 14). Cheliceral movable finger with 5 basal teeth on ventral edge. Pedi- A NEW SPECIES OF EUSCORPIOPS FROM S. CHINA Zootaxa 1582 © 2007 Magnolia Press · 21 中国科技论文在线 http://www.paper.edu.cn palps: femur has four carinae, covered with irregular granules on dorsal and ventral surface (Figs. 2, 9), interior aspect with serrated carinae; patella with five carinae, covered with irregular granules on dorsal sur- face and smooth ventrally (Figs. 4, 5, 11, 12). Trichobothrial pattern of type C, neobothriotaxic by Vachon (1974); patella with 18 external trichobothria (5 eb, 2 esb, 2 em, 4 est, 5 et), 10 ventral trichobothria (Figs. 3, 5, 10, 12). Chela is narrow and elongated (Figs. 15–18, 19–22); the ratio between length and width is 3.4 in male holotype and 3.3 in female paratype. Digital, ventroexternal and ventrointernal carinae are moderately granular, Dorsal internal carina is strongly granular, other carinae are vestigial or absent (Figs. 15–18, 19–22). Size range of total length 46.1–49.1. Description based on male holotype and one female paratype. Measurements in Table 1. TABLE 1: measurements (in mm) of holotype and paratype specimens. MOAC= Median ocular to the anterior margin of the carapace, MOPC=Median ocular to the posterior margin of the carapace. Euscorpiops yangi sp.n. Male holotype Female paratype Total length 47.8 51.3 Carapace length 6.8 7.3 Anterior width 3.2 3.2 Posterior width 7.3 8.2 Mesosomal segments length 18.3 21.3 Metasomal segment I length 2.2 2.2 width 2.7 2.8 Metasomal segment II length 2.7 2.6 width 2.4 2.4 Metasomal segment III length 2.9 3.0 width 2.2 2.3 Metasomal segment IV length 3.2 3.2 width 2.2 2.2 Metasomal Segment V length 5.5 5.3 width 2.1 2.1 Telson length 6.4 6.4 width 2.2 2.0 depth 2.1 1.9 Vesicle length 5.5 4.5 Aculeus length 1.8 1.9 Pedipalp Femur length 7.7 7.7 width 3.1 2.9 Patella length 6.8 6.8 width 3.8 3.6 Chela length 14.6 14.5 width 4.2 4.5 depth 3.9 3.7 Movable finger length 7.2 7.9 MOAC length 2.5 2.7 MOPC length 4.2 4.7 Pectinal teeth 7:7 5:6 22 · Zootaxa 1582 © 2007 Magnolia Press ZHU ET AL.