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A NEW SPECIES of BUTHACUS BIRULA, 1908 from the REGION of GHARDAÏA, ALGERIA (SCORPIONES, BUTHIDAE) Wilson R. Lourenço1 &

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A NEW SPECIES of BUTHACUS BIRULA, 1908 from the REGION of GHARDAÏA, ALGERIA (SCORPIONES, BUTHIDAE) Wilson R. Lourenço1 & Revista Ibérica de Aracnología, nº 27 (31/12/2015): 55–59. Grupo Ibérico de Aracnología (S.E.A.). ISSN: 1576 - 9518. http://www.sea-entomologia.org A NEW SPECIES OF BUTHACUS BIRULA, 1908 FROM THE REGION OF GHARDAÏA, ALGERIA (SCORPIONES, BUTHIDAE) Wilson R. Lourenço1 & Salah Eddine Sadine2 1 Muséum national d’Histoire naturelle, Département Systématique et Evolution, UMR7205, CP 053, 57 rue Cuvier 75005 Paris, France. — [email protected] 2 Laboratoire de Recherche sur la Phœniciculture, Faculté des Sciences de la Nature et de la Vie et Sciences de la Terre et de l’Univers. Université KASDI Merbah-Ouargla, 2 Département des Sciences agronomiques, Faculté des Sciences de la Nature et de la Vie et Sciences de la terre, Université de Ghardaïa, BP 455 Ghardaïa 47000, Algeria. — [email protected] Abstract: Since the early 2000s, the genus Buthacus Birula, 1908 (family Buthidae) has been the subject of an important number of studies. Most of the species considered in these studies come from North Africa, in particular from Morocco, Mauritania and Algeria. One more new species of Buthacus is here described from the Algerian Saharan desert, raising the number of confirmed Buthacus species in Algeria to six. This new discovery brings further evidence about the complexity of this genus, and also attests to a con- siderable degree of diversity found in the Algerian Saharan desert. Key words: Scorpiones, Buthidae, Buthacus, new species, Algeria, Ghardaïa region. Una especie nueva de Buthacus Birula, 1908 de la región de Ghardaïa, Argelia (Scorpiones, Buthidae) Resumen: Desde la década de 2000, el género Buthacus Birula, 1908 (familia Buthidae) ha sido objeto de un importante número de estudios. La mayoría de las especies consideradas en estos estudios provienen de África del Norte, en particular de Marruecos, Mauritania y Argelia. Se describe una especie nueva de Buthacus del desierto del Sahara argelino, elevando el número de espe- cies de Buthacus confirmadas en Argelia a seis. Este descubrimiento aporta nuevas pruebas sobre la complejidad del género, y da fe del grado de diversidad que se encuentra en el desierto del Sahara argelino. Palabras clave: Scorpiones, Buthidae, Buthacus, especie nueva, Argelia, región de Ghardaïa. Taxonomy / Taxonomía: Buthacus samiae sp. n. Introduction As already outlined in previous publications (Lourenço, 2006, The efforts enterprise by Lourenço (2006) to clarify the 2013), the genus Buthacus was erected by Birula (1908) as a status of some Buthacus populations in North Africa, con- subgenus of Buthus Leach, having as its type species Buthus ducted to the description of some new species, including from leptochelys (Ehrenberg, 1829), described from Sinai (Pales- Algeria (Lourenço, 2006, 2013). Recent field work performed tinе) as Androctonus (Leiurus) leptochelys. Since its creation, by the junior author in the Region of Ghardaïa, North of the Buthacus has been considered as a subgenus or as a genus by Central Algerian Saharan region lead to the collection of to different authors. It was finally defined as a valid genus, several Buthacus specimens. Precise analysis of these speci- related to Buthus, by Vachon (1949, 1952). mens showed that they were different from Buthacus birulai In his important study of the North African scorpions, Lourenço, 2006, species also distributed in the North of Alge- Vachon (1949, 1952) discussed the wide distribution of the ria. Consequently, a new species of Buthacus is described genus Buthacus, which was then known from the Atlantic here. This new description attests to a considerable degree of coast of Africa to Palestine. Today the known distribution of diversity found in the Algerian Saharan Desert (Lourenço & this genus is much wider since species are known from Af- Sadine, 2014). ghanistan and even India (Lourenço, 2004; Zambre & Lou- renço, 2010). Vachon (1952) drew the attention to the ex- Ecological comments on the Region of Ghardaïa treme complexity of this genus and, stated that no one could be certain about its precise composition. He also drew atten- The Region of Ghardaïa, is located in the North of the Central tion to the fact that Buthacus leptochelys (Ehrenberg) and Algerian Saharan region (Fig. 1 map) and covers a total area Buthacus arenicola Simon could represent two complexes of of ca. 86,560 km2. The average altitude of the main reliefs is forms or species. of 520 meters. Geomorphological features are constituted by In their ‘Fauna Palaestina’ Levy and Amitai (1980) the Regs and Ergs (Benkenzou et al., 2007). The region is equally attempted to divide the genus Buthacus in two groups characterized by a dry Saharan climate with extreme thermal mainly on basis of the structure of the dentition of the mova- amplitudes between the day and the night, reaching 15-16 ble finger. They also discussed the difficulties of making a degrees (Sam, 2012). The coldest month is January with a precise definition of several forms, and stated as follows: minimal temperature of 6.2°C, whereas the hottest month is ‘These groups could be further divided according to other July with a maximum temperature of 41.8°C. characters however, the definite position of several forms Rain fall is extremely low in the region of Ghardaïa from North Africa is still uncertain’. This opinion follows that with an average value of 80.2 mm per year. Air humidity is of Vachon (1952) in the sense that Buthacus leptochelys and rather weak with a maximum value of 55.5% in December Buthacus arenicola undoubtedly represent not individual and a minimum of 21.6% in July (Chehma, 2011). Analysis of species but rather complexes of species. dry periods over several years attest that 11 months are dry 55 ranging from February to December; only a short and slightly Table I. Morphometric values (in mm) of male (holotype) and female paratype of Buthacus samiae sp. n. more humid period can be experienced in January. The new species described here was collected in zones ♂ ♀ of desert rocks with sand beds but also in sand dunes with Total length (telson included) 54.9 56.7 Carapace: scarce grasses vegetation - Regs and Ergs (Fig. 2-3). The new -length 5.5 6.2 species, Buthacus samiae sp. n. shows all the characteristics -anterior width 3.4 3.8 of a typical psammophilic element (Fig. 4). -posterior width 6.2 6.7 Mesosoma length: 14.2 15.7 Metasomal segment I: -length 4.7 4.6 Methods -width 3.6 3.8 Illustrations and measurements were made with the aid of a Metasomal segment II: -length 5.4 5.3 Wild M5 stereo-microscope with a drawing tube (camera -width 3.3 3.6 lucida) and an ocular micrometer. Measurements follow Metasomal segment III: Stahnke (1970) and are given in mm. Trichobothrial notations -length 5.6 5.5 are those of Vachon (1974) and morphological terminology -width 3.2 3.4 Metasomal segment IV: mostly follows Vachon (1952) and Hjelle (1990). -length 6.0 5.8 -width 2.7 2.8 Metasomal segment V: Taxonomic account -length 7.2 6.9 -width 2.7 2.8 BUTHIDAE C. L. Koch, 1837 -depth 2.4 2.5 Telson: Buthacus Birula, 1908 - length 6.3 6.7 - width 2.0 2.1 Buthacus samiae sp. n. (Fig. 5-18; Table I) - depth 1.9 2.2 Pedipalp: YPE MATERIAL T . Algeria, Region of Ghardaïa, Hassi L’Fhel - Femur length 4.9 4.6 (31° 43’ N, 003° 44’ E), in Reg with sand bed, 466 m, - Femur width 1.4 1.6 17/I/2014 (S. E. Sadine); male holotype, 1 male, 2 female - Patella length 6.2 6.0 paratypes. Sebseb (32° 08’ N, 03° 39’ E), in Erg formation, - Patella width 1.9 2.1 - Chela length 8.5 8.4 455 m, 7/III/2015 (S. E. Sadine); 1 male, 3 female paratypes. - Chela width 1.8 1.4 Holotype and five paratypes deposited in the Muséum natio- - Chela depth 2.0 1.7 nal d’Histoire naturelle, Paris; two paratypes deposited in the Movable finger: University of Ghardaïa, Algeria. - length 5.3 5.8 ETYMOLOGY: Honors Professor Samia Bissati, Université KASDI Merbah-Ouargla for her constant support to the junior Prosoma: Anterior margin of carapace not emarginate, author’s work. straight to slightly convex. Carapace carinae weakly deve- loped; anterior median carinae weak to obsolete; central me- DIAGNOSIS: Scorpions of moderate to small size with a total dian, posterior median and central lateral carinae weak to length of 54.9 and 56.7 mm for largest male and female res- obsolete; carinae better marked on females. All furrows weak pectively. General coloration yellow to pale yellow without to obsolete. Intercarinal spaces weakly granular to smooth. spots in adults. Pedipalps with 8-9 rows of granules on the Median ocular tubercle slightly anterior to the centre of the fixed and movable fingers; external accessory granules ab- carapace; median eyes separated by one and a half ocular sent; internal accessory granules moderately marked. Larges diameters. Four pairs of lateral eyes; the first three disposed in granules dividing rows are conspicuous. Trichobothriotaxy A- one line, the fourth situated behind eye three. Mesosoma: (beta) orthobothriotaxic; fixed fingers with trichobothria et Tergites I-VI tricarinate; all carinae very weak; lateral carinae and dt situated at the same level and, trichobothria esb and eb vestigial on segment I; tergite VII pentacarinate, with lateral closed to each other. Dorsal and latero-dorsal carinae on me- pairs of carinae moderate; median carinae present on proximal tasomal segments I to IV without any well marked spiniform one-half, moderately marked. Intercarinal spaces weakly granules; latero-ventral carinae on segment V with spinoid granular to smooth. Sternites: carinae absent from sternites granules and some inconspicuous lobes. Tibial spurs mode- III-VI; rate to weak on legs III and IV.
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