Chactopsoides marahuacaensis ( González-Sponga, 2004 ) Ochoa & Rojas-Runjaic & Pinto-da-Rocha & Prendini, 2013

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 : 105-108

Chactopsoides marahuacaensis ( González-Sponga, 2004) , n. comb.

Figures 2 , 45E , 46E , 48B , 49B , 51C , 52E , 62 , 63

Chactopsis marahuacaensis González-Sponga, 2004: 1 , 6–8, plate II, map 1, table 2; Botero- Trujillo, 2008: 34.

TYPE MATERIAL: Holotype ♀ ( MAGS 4434 ), paratype ♀ ( MAGS 4433 ), VENE- ZUELA: Amazonas: Municipio Alto Orinoco: near Culebra village, near base of Marahuaca mountain , Cunucunuma river , 03 ° 469000 N 65 ° 489000W, 250 m, iii.1983, P. Anduze.

DIAGNOSIS: Although the adult male of this species is unknown, it is placed in Chactopsoides , n. gen., on the basis of its trichobothrial pattern. Chactopsoides marahuacaensis , n. comb., differs from C. anduzei , n. comb., and C. gonzalezspongai , n. sp., as follows. In general, C. marahuacaensis , n. comb., is less granular than the other two species: the carapace is mostly smooth, with scattered granules near the anterior margin only, and nongranular surfaces punctate (fig. 45E), compared with C. anduzei , n. comb., and C. gonzalezspongai , n. sp. (fig. 45A–D), in which the carapace is coarsely to finely granular, especially anteriorly and laterally; the pedipalp chela manus external and ventral surfaces are mostly smooth and punctate in C. marahuacaensis , n. comb., but weakly granular, and the nongranular surfaces punctate in C. anduzei , n. comb., and C. gonzalezspongai , n. sp.; the LIM carinae of metasomal segments II and III are represented by only a few granules posteriorly in C. marahuacaensis , n. comb., and C. gonzalezspongai , n. sp. (fig. 48B), whereas they are restricted to the anterior third of the each segment in C. anduzei , n. comb. (fig. 47); the metasomal VSM carinae are obsolete on segment II, and complete and granular on segments III and IV in C. marahuacaensis , n. comb., but complete and granular on segments II–IV in C. anduzei , n. comb., and C. gonzalezspongai , n. sp. The DMA carina of the pedipalp chela is costate on the fixed finger only in C. marahuacaensis , n. comb., and C. anduzei , n. comb., but costate on the distal quarter of the manus and on the fixed finger in C. gonzalezspongai , n. sp. Chelal trichobothrium db is situated closer to eb in C. marahuacaensis , n. comb. (fig. 63A), slightly proximal to esb in C. anduzei , n. comb. (fig. 56B), and equidistant between esb and eb in C. gonzalezspongai , n. sp. (fig. 60B). The dimensions of metasomal segment V and telson provide additional differences between C. marahuacaensis , n. comb., C. anduzei , n. comb., and C. gonzalezspongai , n. sp. The length/width ratio of metasomal segment V (♀) is 1.77–1.82 in C. marahuacaensis , n. comb., 1.75–1.96 in C. anduzei , n. comb., and 1.63–1.72 in C. gonzalezspongai , n. sp. The telson length/height ratio (♀) is 3.13–3.15 in C. marahuacaensis , n. comb., 3.40–3.85 in C. anduzei , n. comb., and 2.63– 3.13 in C. gonzalezspongai , n. sp.

SUPPLEMENTARY DESCRIPTION: The following supplements González-Sponga’s (2004) original description.

Trichobothria: Femur with three trichobothria (fig. 62A). Patella with 33 trichobothria (fig. 62B–D): two dorsal, seven ventral, 23 external, one internal; v 6 and v 7 trichobothria situated submedially, v 6 equidistant between v 5 and v 7; est 5 situated on VE margin and slightly distal to est 4; est 2 situated proximal to other est trichobothria; em 1 situated slightly distal to em 2 and em 3; esb 2 situated slightly distal to esb 3. Chela with 26 trichobothria (fig. 63): 10 situated on manus, three ventral, seven external; 16 situated on fixed finger, seven external, six dorsal, three internal (it, ist, ib); isb absent; it situated between et 3 and est; Est situated equidistant between Et 1 and V 3; Et 2 situated distal to Et 1; eb situated near base of fixed finger; db situated between esb and eb, closer to eb; dm 1 situated slightly distal to et 3.

DISTRIBUTION: This species is known only from the type locality in the state of Amazonas, Venezuela (fig. 2).

HABITAT: The type locality of this species falls within primary rainforest.

Figures

Fig. 2. Distribution of Chactopsoides, n. gen., and Megachactops, n. gen., plotting known locality records in Brazil, Colombia, and Venezuela. Chactopsoides anduzei (González-Sponga, 1982), n. comb., solid squares; Chactopsoides gonzalezspongai, n. sp., solid diamond; Chactopsoides marahuacaensis (González-Sponga, 2004), n. comb., open square; Chactopsoides yanomami (Lourenço et al., 2011), n. comb., solid circle; Megachactops coriaceo (González-Sponga, 1991), n. comb., open diamond; Megachactops kuemoi, n. sp., open circle; undetermined Chactopsoides species, solid stars.

Fig. 45. Chactopsoides, n. gen., carapace, dorsal aspect. A, B. Chactopsoides anduzei (González- Sponga, 1982), n. comb. A. ³ (AMNH). B. ♀ (AMNH). C, D. Chactopsoides gonzalezspongai, n. sp. C. Paratype ³ (AMNH). D. Paratype ♀ (AMNH). E. Chactopsoides marahuacaensis (González-Sponga, 2004), n. comb., holotype ♀ (MAGS). Scale bars 5 1 mm.

Fig. 46. Chactopsoides, n. gen., sternum and pectines, ventral aspect. A, B. Chactopsoides anduzei (González-Sponga, 1982), n. comb. A. ³ (AMNH). B. ♀ (AMNH). C, D. Chactopsoides gonzalezspongai, n. sp. C. Paratype ³ (AMNH). D. Paratype ♀ (AMNH). E. Chactopsoides marahuacaensis (González- Sponga, 2004), n. comb., holotype ♀ (MAGS). Scale bars 5 1 mm.

Fig. 48. Chactopsoides, n. gen., metasomal segments III–V, lateral aspect. A. Chactopsoides gonzalezspongai, n. sp., paratype ³ (AMNH). B. Chactopsoides marahuacaensis (González-Sponga, 2004), n. comb., holotype ♀ (MAGS). Scale bars 5 1 mm.

Fig. 49. Chactopsoides, n. gen., metasomal segments I–IV, ventral aspect. A. Chactopsoides gonzalezspongai, n. sp, paratype ³ (AMNH). B. Chactopsoides marahuacaensis (González-Sponga, 2004), n. comb., holotype ♀ (MAGS). Scale bars 5 1 mm.

Fig. 51. Chactopsoides, n. gen., metasomal segment V, ventral aspect. A. Chactopsoides anduzei (González-Sponga, 1982), n. comb., ³ (AMNH). B. Chactopsoides gonzalezspongai, n. sp., paratype ♀ (AMNH). C. Chactopsoides marahuacaensis (González-Sponga, 2004), n. comb., holotype ♀ (MAGS). Scale bars 5 1 mm.

Fig. 52. Chactopsoides, n. gen., telson, lateral aspect. A, B. Chactopsoides anduzei (González-Sponga, 1982), n. comb. A. ³ (AMNH). B. ♀ (AMNH). C, D. Chactopsoides gonzalezspongai, n. sp. C. Paratype ³ (AMNH). D. Paratype ♀ (AMNH). E. Chactopsoides marahuacaensis (González-Sponga, 2004), n. comb., holotype ♀ (MAGS). Scale bars 5 1 mm.

Fig. 62. Chactopsoides marahuacaensis (González-Sponga, 2004), n. comb., holotype ♀ (MAGS), dextral pedipalp segments. A. Femur. B–D. Patella. A, B. Dorsal aspect. C. External aspect. D. Ventral aspect. Scale bar 5 1 mm.

Fig. 63. Chactopsoides marahuacaensis (González-Sponga, 2004), n. comb., holotype ♀ (MAGS), dextral pedipalp chela. A. Dorsal aspect. B. External aspect. C. Ventral aspect. D. Internal aspect. Scale bars 5 1 mm.