Chactopsis buhrnheimi Lourenço, 2003

Ochoa, José A., Rojas-Runjaic, Fernando J. M., Pinto-da-Rocha, Ricardo & Prendini, Lorenzo, 2013, Systematic Revision Of The Neotropical Scorpion Genus Chactopsis Kraepelin, 1912 (Chactoidea: Chactidae), With Descriptions Of Two New Genera And Four New Species, Bulletin of the American Museum of Natural History 2013 (378), pp. 1-121 : 39-40

Chactopsis buhrnheimi Lourenço, 2003

Figures 1 , 30 , 31

Chactopsis buhrnheimi Lourenço, 2003: 169–173 ,

figs. 4–14; Botero-Trujillo, 2008: 34.

TYPE MATERIAL: Subad. ³ holotype ( INPA-SP 042), BRAZIL: Amazonas: Municipio Guajará: Ipixuna river, 07 ° 069390 S 73 ° 059250W, 13–19.vi.1995, P. Bührnheim and N.O. Aguiar.

DIAGNOSIS: This species appears to be most closely related to C. insignis based on the similar pedipalp carination and trichobothrial pattern. According to Lourenço (2003), C. buhrnheimi may be separated from C. insignis by its more pronounced granulation and by means of its pigmentation pattern, with carapace, tergites, sternites, coxosternal region, legs, and telson yellowish with black spots, and pedipalp femur blackish, patella and chela dark yellowish with some irregular spots.

SUPPLEMENTARY DESCRIPTION: The following supplements Lourenço’s (2003) original description.

Trichobothria: Femur with three trichobothria (fig. 30A). Patella with 33 trichobothria (fig. 30B–D): two dorsal, seven ventral, 23 external, one internal; trichobothrium v 6 situated slightly closer to v 5 than v 7; est 5 situated on VE margin, slightly distal to est 4; est 2 situated proximal to est 3 and est 4; et 3 situated slightly distal to et 4; em 1 situated slightly proximal to em 2 and em 3; em 2 and em 3 situated in the same axis; esb 2 situated slightly distal to esb 3. Chela with 26 trichobothria (fig. 31): 10 situated on manus, three ventral, seven external; 16 situated on fixed finger, seven external, six dorsal, three internal (it, isb, ib); ist absent; it situated proximal to est; Est situated closer to V 3 than to Et 1; Et 1 and Et 2 situated in same axis; eb situated proximal to base of fixed finger; db situated slighty proximal to esb; dm 1 situated slightly proximal to et 3.

REMARKS: The diagnosis provided in the original description of this species is uninformative, and fails to provide comparable differences with C. insignis or other species of the genus. The holotype is a subadult male hence the putative diagnostic differences proposed to separate it from, e.g., the female holotype of C. insignis , may be conflated with ontogenetic and/or sexual differences. Subadults and juveniles of other species of Chactopsis and Chactopsoides , n. gen. (e.g., C. anduzei , n. comb., and C. gonzalezspongai , n. sp.), often differ from adult conspecifics in the pigmentation pattern of the pedipalp patella and chela. Males of all species in these genera are more granular than females. The trichobothrial pattern of C. buhrnheimi is similar to that of C. insignis , with which it may prove synonymous, once adult specimens become available.

DISTRIBUTION: This species is known only from the type locality in the state of Amazonas, Brazil, near the border with Peru (fig. 1).

HABITAT: The type locality falls within an area of primary rainforest. According to Lourenço (2003), the holotype was collected on a terrestrial bromeliad.

Figures

Fig. 1. Distribution of Chactopsis Kraepelin, 1912, plotting known locality records in Brazil, Peru, and Venezuela. Chactopsis amazonica Lourenço and Francke, 1986, open circles; Chactopsis barajuri González- Sponga, 1982, solid triangle; Chactopsis buhrnheimi Lourenço, 2003, open star; Chactopsis curupira, n. sp., open triangle; Chactopsis chullachaqui, n. sp., open diamond; Chactopsis insignis Kraepelin, 1912, solid squares; Chactopsis siapaensis González-Sponga, 1991, open square; Chactopsis sujirima González-Sponga, 1982, solid circles; undetermined Chactopsis species, solid stars. Box indicates area mapped in figure 2.

Fig. 30. Chactopsis buhrnheimi Lourenço, 2003, juv. ³ holotype (INPA), dextral pedipalp segments. A. Femur. B–D. Patella. A, B. Dorsal aspect. C. External aspect. D. Ventral aspect. Scale bar 5 1 mm.

Fig. 31. Chactopsis buhrnheimi Lourenço, 2003, juv. ³ holotype (INPA), dextral pedipalp chela. A. Dorsal aspect. B. External aspect. C. Ventral aspect. D. Internal aspect. Scale bar 5 1 mm.