Saharobuthus elegans Lourenco & Duhem 2009, sp. n.
| Main Authors: | Lourenco, Wilson, Duhem, Bernard |
|---|---|
| Format: | info publication-taxonomictreatment |
| Terbitan: |
, 2009
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/3854812 |
Daftar Isi:
- Saharobuthus elegans sp. n. urn:lsid:zoobank.org:act: 3C2F50F7-DD92-4854-8584-CBE4FF62B084 Figs 1, 9-15, 30 Diagnosis: as for the new genus. Type material: Occidental Sahara, region of Adrar-Sotuf, 430 m alt., 25/V/1964 (P. L. Dekeyser), 1 male holotype. Deposited in the collection of the Muséum national d’Histoire naturelle, Paris. Etymology: The specific name is a reference to the very slender build of the new species. Description based on the male holotype (Measurements in Table 1). Coloration. Basically yellowish to pale yellow, with some light reddish zones. Prosoma: carapace yellowish with carinae and granulations reddish; median and lateral eyes surrounded by black pigment. Mesosoma: yellowish with some very light greyish zones. Metasoma: all segments yellowish, with carinae reddish. Vesicle pale yellow; base of aculeus yellowish with a reddish tip. Venter yellowish; pectines pale yellow. Chelicerae yellowish without spots; fingers yellowish with reddish teeth. Pedipalps yellowish with carinae slightly reddish; rows of granules on fingers reddish. Legs yellowish with some diffused spots. Morphology. Prosoma: Anterior margin of carapace not emarginated, almost straight. Carapace carinae strongly developed; anterior median, central median and posterior median carinae strongly marked; central median and posterior median fused; central lateral strongly marked; posterior median carinae terminating distally in a small spinoid process that extends slightly beyond the posterior margin of the carapace (process less marked than in the genus Compsobuthus). Intercarinal spaces strongly granular on anterior and posterior zones; moderate to weak on the other regions. Median ocular tubercle anterior to the centre of the carapace; median eyes separated by two ocular diameters. Three pairs of lateral eyes. Mesosoma: Tergites I-VI tricarinate. Lateral carinae on I-VI strongly marked; each carina terminating distally with a spinoid process that extends slightly beyond the posterior margin of the tergite. Median carinae on I moderate; on II-VI strong, crenulate; terminating distally on each segment with a spinoid process that also extends slightly beyond the posterior margin of the tergite. Tergite VII pentacarinate, with lateral pairs of carinae strong; median carinae present on proximal half, strong. Intercarinal spaces strongly granular. Sternites: Lateral carinae absent from sternites III to VI; moderate, finely crenulate on VII. Submedian carinae on sternites III-VI absent; on VII moderate. Pectines long; pectinal tooth count 28-29. Metasoma: Segments I-II with 10 carinae, crenulate; III-IV with 8 carinae. Segment V with 5 carinae; ventromedian carinae strongly marked, with several lobate denticles; anal arc * value including the telson length. composed of 10 ventral teeth and four rather uniform lateral lobes. Dorsal furrows of all segments moderately developed, smooth; intercarinal spaces weakly to moderately granular. Telson weakly granular to smooth; vesicle with a pear-like shape, and a long aculeus longer than vesicle; subaculear tooth absent. Chelicerae with two reduced but not fused denticles at the base of the movable finger (Vachon, 1963). Pedipalps: Trichobothrial pattern orthobothriotaxic, type A (Vachon, 1974); dorsal trichobothria of femur in β (beta) configuration (Vachon, 1975). Femur pentacarinate; carinae strongly crenulate. Patella with eight carinae, moderate; dorsointernal carinae with 2-3 spinoid granules. Chela short with moderately elongated fingers; all carinae vestigial. Dentate margins on movable and fixed fingers composed of 11-12 oblique rows of granules; outer and inner accessory granules present on both fingers; four granules, two small and two large, located proximally to the terminal granule on the movable finger; basal region of movable finger with a strong lobe. Legs: Ventral aspect of tarsi with two series of spine-like setae. Tibial spurs present on legs III and IV, strongly marked. Pedal spurs present on all legs, moderate to strongly marked. Geographic distribution. Only known from the type locality. Genus Pantobuthus gen. n. urn:lsid:zoobank.org:act: 3C2F50F7-DD92-4854-8584-CBE4FF62B084 Diagnosis. Large scorpions, 66.3 mm in total length (excluding telson). Coloration generally pale yellow with regions of very light grey. Carapace carinae moderately marked; ‘lyra’ configuration rather incomplete; median ocular tubercle at the centre of carapace; three pairs of lateral eyes situated in a posterior position in relation to the ante- rior edge; third pair totally vestigial. Sternum triangular, wider than long. Pedipalps very short and bulky; chela strongly globular; dentate margins on fixed and movable fingers of pedipalp chela composed of 9-10 oblique rows of granules. Outer and inner accessory granules present on both fingers, strongly marked. Pectinal tooth count 24-23; fulcra present; basal middle lamellae not dilated. Chelicerae with one basal denticle on the fixed finger; basal denticles of the movable finger strongly reduced. Metasomal segments II to IV with strong spinoid granules on ventral carinae; telson with a strongly globular vesicle; aculeus much shorter than vesicle and strongly curved; subaculear tooth absent. Legs: tarsi with two series of short spine-like setae; internal series with 5-7 setae, external reduced to 1-3 setae or totally absent; tibial spur strong on legs III and IV; pedal spurs moderate to strong on legs I to IV. Trichobothrial pattern A-β (beta), orthobothriotaxy. Trichobothrium db of chela totally displaced over the internal face of fixed finger. Derivatio nominis: generic name refers to the multiple characteristics of buthid genera present in the new genus. Type species Pantobuthus complicatus sp. n. Affinities of the new genus. The new genus Pantobuthus shows affinities with several genera, such as Odontobuthus, Buthus, Mesobuthus, Hottentotta and Vachoniolus, which are also elements of the North African and Palaearctic faunas. The moderately marked carapace carinae which form only an incomplete ‘lyra’ configuration associates the new genus to Hottentotta and Mesobuthus, but metasomal segments II to IV with strong spinoid granules on the ventral carinae, are more similar to those of the genus Odontobuthus. Th e very central position of the median ocular tubercle on the carapace and the shape of the telson with a strongly globular vesicle and a very short aculeus associates Pantobuthus gen. n. with Buthus. In this last genus, however, both carapace and mesosomal carinae are strongly developed and the ‘lyra’ configuration is totally complete. Th e very short and bulky pedipalps again associate Pantobuthus gen. n. with Buthus. However, the very strongly globular chela recall those of the male Vachoniolus. The male of Pantobuthus complicatus sp. n. remains unknown. Finally, the total displacement of chela trichobothrium db to the internal surface of fixed finger, the retreated position of lateral eyes and the tarsi with two series of short spine-like setae, but with external series reduced or totally absent appear to be particular characteristics of this genus. Genus Pantobuthus gen. n. urn:lsid:zoobank.org:act: 3C2F50F7-DD92-4854-8584-CBE4FF62B084 Diagnosis. Large scorpions, 66.3 mm in total length (excluding telson). Coloration generally pale yellow with regions of very light grey. Carapace carinae moderately marked; ‘lyra’ configuration rather incomplete; median ocular tubercle at the centre of carapace; three pairs of lateral eyes situated in a posterior position in relation to the ante- rior edge; third pair totally vestigial. Sternum triangular, wider than long. Pedipalps very short and bulky; chela strongly globular; dentate margins on fixed and movable fingers of pedipalp chela composed of 9-10 oblique rows of granules. Outer and inner accessory granules present on both fingers, strongly marked. Pectinal tooth count 24-23; fulcra present; basal middle lamellae not dilated. Chelicerae with one basal denticle on the fixed finger; basal denticles of the movable finger strongly reduced. Metasomal segments II to IV with strong spinoid granules on ventral carinae; telson with a strongly globular vesicle; aculeus much shorter than vesicle and strongly curved; subaculear tooth absent. Legs: tarsi with two series of short spine-like setae; internal series with 5-7 setae, external reduced to 1-3 setae or totally absent; tibial spur strong on legs III and IV; pedal spurs moderate to strong on legs I to IV. Trichobothrial pattern A-β (beta), orthobothriotaxy. Trichobothrium db of chela totally displaced over the internal face of fixed finger. Derivatio nominis: generic name refers to the multiple characteristics of buthid genera present in the new genus. Type species Pantobuthus complicatus sp. n. Affinities of the new genus. The new genus Pantobuthus shows affinities with several genera, such as Odontobuthus, Buthus, Mesobuthus, Hottentotta and Vachoniolus, which are also elements of the North African and Palaearctic faunas. The moderately marked carapace carinae which form only an incomplete ‘lyra’ configuration associates the new genus to Hottentotta and Mesobuthus, but metasomal segments II to IV with strong spinoid granules on the ventral carinae, are more similar to those of the genus Odontobuthus. Th e very central position of the median ocular tubercle on the carapace and the shape of the telson with a strongly globular vesicle and a very short aculeus associates Pantobuthus gen. n. with Buthus. In this last genus, however, both carapace and mesosomal carinae are strongly developed and the ‘lyra’ configuration is totally complete. Th e very short and bulky pedipalps again associate Pantobuthus gen. n. with Buthus. However, the very strongly globular chela recall those of the male Vachoniolus. The male of Pantobuthus complicatus sp. n. remains unknown. Finally, the total displacement of chela trichobothrium db to the internal surface of fixed finger, the retreated position of lateral eyes and the tarsi with two series of short spine-like setae, but with external series reduced or totally absent appear to be particular characteristics of this genus.
- Published as part of Lourenco, Wilson & Duhem, Bernard, 2009, Saharo-Sindian buthid scorpions; description of two new genera and species from Occidental Sahara and Afghanistan, pp. 37-54 in ZooKeys 14 on pages 40-45, DOI: 10.3897/zookeys.14.212, http://zenodo.org/record/576470