Vaejovis ocotensis Zárate-Gálvez & Francke, 2009, new species
Creators: name: Zárate-Gálvez, Kaleb
name: Francke, Oscar F.
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Scorpiones
Vaejovidae
Vaejovis
Vaejovis ocotensis

description: Vaejovis ocotensis, new species
(Figs 1–14, 16, 18)
Type data. Holotype female (CNAN T-0404) from Cueva del Metate [16° 53’ 8” N – 93° 25’ 13” W, elevation 900 m], 3.6 km NW Ocuilapa de Juárez, Municipio Ocozocoautla de Espinoza, Chiapas, México, 7 March 1999, M. Hernández L. (col.). Paratypes: two adult females (CNAN T-0405) from “El Ocote, Chiapas, 8 March 1993, E. Barrera (col.)” [No details are available as to where in the Biosphere Reserve these two specimens were collected].
Etymology. The specific epithet is an adjective derived from the type locality.
Diagnosis. The following characters place this species in the nitidulus group: (1) carapace obtusely emarginated, with distinct anteromedian notch; (2) chela trichobothria ib and it located at the base of the fixed finger; (3) pectinal teeth on females are subequal in size; (4) cheliceral movable finger with distinct serrula; and (5) ventral spinule row of telotarsus terminating distally with one or two spinules only.
Pedipalp chela fixed finger with primary row of denticles divided into six subrows. Pedipalp patella with two esb trichobothria. Metasoma with ventral submedian carinae present on segments I–IV, weak to moderate, granular. Metasomal segment I wider than long, others longer than wide; segment V length/width ratio 2.30– 2.57. Pectinal tooth count 18–20 on females. Chelal carinae obsolete, except for a few granules along prodorsal and dorsal marginal carinae.
Although the holotype was collected in or near a cave, the species shows no troglomorphies whatsoever.
Description of the female holotype (Figs 1–2)
Color: Base color dorsally medium brown, metasoma darkening distally to reddish brown; variegated fuscosity throughout, gradually fainter toward metasoma; segment V without distinct fuscosity. Ventrally pale yellow, except metasoma moderately infuscate. Pedipalps and telson yellow-orange. Chelicera pale yellow to cream, manus dorsally with a slight variegated fuscosity. Legs yellow-orange gradually lightening to pale yellow on basitarsus and telotarsus; with longitudinal fuscous bands on femur, tibia and stronger in patella.
Prosoma: Carapace longer than wide, surface shagreened to minutely granulose throughout; anterior margin obtusely emarginated, with distinct anteromedian notch, with three pairs of setae. Ocular tubercle low, located on anterior one-third; three pairs of lateral eyes, posterior-most eye about one-half diameter of anterior two. Anterior median furrow moderately deep and broad; posterior median furrow shallow and broad near median eyes, gradually becoming deeper and narrower; posterolateral furrows shallow and broad. Sternum pentagonal, with five pairs of setae; median longitudinal furrow deep and broad.
Mesosoma: Tergites with dense and fine granulation, segments III–VII with some sparse, slightly larger granules towards posterior margins; VII with two pairs of strong, subserrate carinae, lateral margins subserrated. Sternites III–VI smooth and lustrous; VII with dense and fine granulation; submedian carinae absent, lateral carinae moderately strong, granular; lateral margins crenulate. Genital opercula with two pairs of setae, with almost complete median longitudinal membranous connection. Pectinal tooth count 20–20; teeth subequal in size.
Metasoma: Intercarinal spaces densely, minutely granulose. Ventral submedian carinae granular, on I weak, on II–IV moderate. Ventrolateral carinae strong, on I–IV subserrate. Lateral inframedian carinae subserrate, on I strong; on II strong, on distal third only; on III represented by two small, distal granules; on IV absent. Lateral supramedian carinae on I–III strong and serrate, with distalmost denticle enlarged, spinoid (on I smaller than II and III); on IV strong, serrate to distally crenulate. Dorsolateral carinae strong, serrate, distally ending in an enlarged, spinoid denticle, larger than distalmost denticles of lateral supramedian carinae. Segment V (Fig 3): ventromedian and ventrolateral carinae, moderate and granular; lateromedian carinae weak, granulose, present only on basal two-thirds; dorsolateral carinae moderate, subserrate-granular on basal one-fifth, weak and granulose beyond.
Metasomal setal counts: on dorsolateral carinae 1/1:3/3:3/3:3/3; on lateral supramedian carinae 4/4:4/3:3/ 3:3/3; on lateral inframedian carinae 4/5:1/2:1/1:1/0; on ventrolateral carinae 4/4:4/4:4/4:4/4. Segment V: on dorsolateral carinae 5/5; lateral median carinae 9/9; ventrolateral carinae 5/5; ventromedian carinae with 5 “pairs” at variable distances from the keel proper.
Telson: Vesicle elongate and globose, smooth dorsally, ventrally slightly granulose, with sparse setation (6 in posterior edge of vesicle, 1 in position of subaculear tooth, 16 in total). Aculeus lacking basal microdenticles. Some small granules near position of subaculear tubercle (Fig 3).
Chelicera: Movable finger with a distinct serrula ventrally. Manus with one seta dorsally.
Pedipalps: Orthobothriotaxic, Type “C”. Intercarinal spaces densely, minutely granulose. Femur (Fig 4): retrodorsal carina strong, granulose; prodorsal and proventral carinae strong, granular; retroventral carina absent; retrolateral median carina notable by 3–4 prominent granules; ventral face with a basal cluster of larger granules; prolateral face with some larger granules and 7–9 setae. Patella (Figs 5–6): prodorsal and proventral carinae strong granular; retrodorsal and retroventral weak-moderate, granulose; prolateral median carina notable by 8–10 prominent granules; retrolateral median carina very weak, granulose, distinguished by some granules.
Chela (Figs 7–8): Surface shagreened to minutely granulose throughout, retrolateral face almost lustrous; manus and fingers long and slender. Dorsal marginal and prodorsal carinae very weak, granulose, distinguished by some basal granules; all other carinae totally absent. Trichobothria ib-it located at base of fixed finger. Both fixed fingers with primary denticle row divided into 6 subrows by 5 enlarged median denticles (MD), 6 inner denticles (ID) (Fig 10). Right movable finger with 7 subrows due to presence of a sixth, basal most MD (Fig 11), 6 ID (fifth from tip missing). Left movable finger with 6 subrows and 5 MD (basal most not differentiated by size), 7 ID (Fig 9).
Legs: Telotarsus III (Figs 12–14) ventromedian spinule row (leg left/right) with 12/13 spinules, plus 4 smaller basal spinules; terminating distally with one spinule only.
Measurements: Table 1.
Intraspecific variation. Male unknown. The two female paratypes (measurements in Table 1) each have pectinal tooth counts of 18–18. On both paratypes, the fixed finger dentition on all fingers is as in the holotype, with 6 subrows, 5 MD and 6 ID. The movable fingers on both paratypes have 6 subrows and 5 MD (missing the basalmost—as in Fig 9), and 7 ID.
The holotype has a single terminal spinule on both telotarsi III (Fig 13); the larger paratype has a single spinule on right telotarsus III, and a terminal pair on the left telotarsus III; the smaller paratype has paired terminal spinules on both telotarsi III.
Metasomal setal counts on the slightly larger paratype (see Table 1): on dorsolateral carinae 1/1:2/2:2/3:3/ 3; on lateral supramedian carinae 2/2:2/2:2/2:5/4; on lateral inframedian carinae 4/3:1/2:1/1:0/0; on ventrolateral carinae 4/4:4/4:4/4:4/5; on ventral submedian carinae 3/3:3/3:4/5:4/5. On segment V: dorsolateral 6/7; lateral median 4/5; ventrolateral 5/5, ventral median 5/4 (four pairs and one single).
Metasomal setal counts on the smaller paratype: on dorsolateral carinae 1/0:2/2:3/2:4/3; on lateral supramedian carinae 2/2:3/2:3/3:5/4; on lateral inframedian carinae 4/4:1/1:1/1:0/0; on ventrolateral carinae 4/ 4:4/4:4/4:4/4; on ventral submedian carinae 3/3:5/5:4/4:4/4. On segment V: dorsolateral 7/6; lateral median 6/ 6; ventrolateral 6/6; ventral median 5 pairs.
Distribution. Known only from the “El Ocote” region.
Comparisons. V. ocotensis sp. n. resembles Vaejovis curvidigitus Sissom 1991, known from the states of Guerrero, Morelos and Oaxaca; Vaejovis solegladi Sissom 1991 from Oaxaca and Puebla, and Vaejovis davidi Soleglad & Fet 2005 known only from Puebla. However it differs as follows: in V. curvidigitus the first three metasomal segments are wider than long; segment V length/width ratio 1.67–1.85; ventral submedian metasomal carinae obsolete on I–II, often present, but faint on III–IV; pedipalp chela is more robust (length/ width ratio 3.73–4.20 in females). In V. ocotensis sp. n. metasomal segments II and III are longer than wide; segment V length/width ratio 2.30–2.57; ventral submedian carinae granular, on I weak, on II–IV moderate; and the pedipalp chela is thinner (length/width ratio 4.90–5.20 in females).
In V. solegladi base color is yellow, without dusky markings on carapace and tergites, ventral submedian carinae on I–IV obsolete; metasomal segment V length/width ratio 1.90–2.02. V. ocotensis sp. n. base color dorsally medium brown, metasoma darkening distally to reddish brown, with variegated fuscosity throughout, gradually fainter toward metasoma; ventral submedian carinae on I-IV granular, weak to moderate, but always present; metasomal segment V length/width ratio 2.30–2.57.
V. davidi is bigger (Total length 44.8–45.6); base color is dark brown; metasomal segment I is longer than wide; the chelal movable finger is longer than carapace; posterior termination of dorsolateral carinae of metasomal segment IV not formed in conspicuous spine; all pedipalp chelal carinae present and irregularly granulose (Figs 15, 17). V. ocotensis sp. n. is smaller (Total length 36.7–37.8); base color is medium brown; metasomal segment I is wider than long; the chelal movable finger is shorter than the carapace; dorsolateral carinae strong, serrate, ending distally in an enlarged, spinoid denticle; chelal carinae obsolete throughout (Figs 16, 18), except for prodorsal and dorsal marginal carinae, distinguished by some granules basally.
description: Published as part of Zárate-Gálvez, Kaleb & Francke, Oscar F., 2009, A new Va e j o v i s (Scorpiones: Vaejovidae) from Chiapas, México, pp. 61-68 in Zootaxa 2313 on pages 62-66, DOI: 10.5281/zenodo.191983