Paruroctonus arnaudi Williams 1972

Paruroctonus arnaudi Williams, 1972: 4-5, 8, fig. 1; Soleglad, 1973b: 355; Williams, 1980: 32, 34, fig. 38, 39; ►Haradon, 1985: 24, 40; Kovarík, 1998: 143; Beutelspacher, 2000: 66, 136, 152, map 32; Sissom, 2000:506; Soleglad & Fet, 2003b: 6; Soleglad & Fet, 2003a: 8.

type(s) :  Paruroctonus arnaudi Williams, 1972, holotype (male), CAS (Type No. 11334), Socorro Sand Dunes, Baja California Norte, Mexico, 12-VII-1969 (S. C. Williams, V. F. Lee).

Original Description: .

Subsequent Accounts:  Haradon (1985) referred this species to the boreus microgroup in the boreus infragroup of the genus Paruroctonus (then recognized as the nominate subgenus  of a more  broadly circumscribed genus Paruroctonus that  included what is now recognized as the genus Smeringerus Haradon). In a partial key to the members of the subgenus, he ascribed the following attributes to this species:

"Cheliceral fixed digit inferior carina extends proximally at least to level of bicusp; carapace length/cheliceral fixed digit length ratio 4 .2 or more; Pectinal teeth 24/24 or more in males and 17/18 or more in females and 37 or more primary denticles (less proximal row) on pedipalp movable fingers, or if fewer pectinal teeth then either (1) dorsal metasomal setae I-IV 0,0,0,1, or (2) no mrs seta on basitarsus II boreus infragroup; Basitarsus II with mrs seta; Carapace length/cheliceral fixed digit length ratio 7.0 or more boreus microgroup; Metasomal setae: ventrals I-IV 3,4,4,5 ; ventrolaterals 4 on IV and 7 on V; Pedipalp fingers in adult male deeply scalloped proximally, in adult female weakly scalloped."

Williams (1980):

"Diagnosis. - Basic color of cuticle goldenyellow with distinctive dusky to dark marbling on carapace and mesosomal dorsum; ventral keels of metasoma usually with dusky outline; pedipalp finger same color as palm; pedipalp palms swollen, strongly granular keels; pedipalp fingers moderately scalloped, male with distinctive open proximal space when fingers closed; pectine teeth 21-25 in females. 26-31 in males; space between ventromedian keels of metasoma without abundant, stout, reddish setae, segment III with fewer than 10 such setae; pedipalps with fixed finger equal to or shorter than palm in length.
Similar to P. grandis and P. silvestrii. Distinguished from P. grandis as follows: metasomal segments not as elongate; with dusky outlining of ventral metasomal keels; pedipalp fingers of male more deeply scalloped and with larger open proximal space when fingers closed; space between ventromedian metasomal keels not hirsute. Distinguished from P. silvestrii as follows: males with distinctive proximal space when pedipalp fingers closed; pedipalp palm ventrally not conspicuously granular; not as darkly marked."

distribution: NORTH AMERICA. México (northwestern coast of Baja California Norte).
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published records:  Paratypes - 61 specimen (41M, 20F, including an allotype (CAS, Type No. 11334), Socorro Sand Dunes, Baja California Norte, Mexico, 12-VII-1969 (S. C. Williams, V. F. Lee). Baja California Norte, Mexico: 19 km N Rancho El Topo, I6-VII-I969 (Williams, Lee): 2.6 km W Colonia Guerrero, 16-VII-1962 (Parrish): Punta Baja. 2-IX-1963 (Schwenkmeyer).

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