Sparianthina parang, Rheims, Cristina Anne, 2011

Rheims, Cristina Anne, 2011, New species of Sparianthina Banks, 1929 (Araneae: Sparassidae: Heteropodinae), Zootaxa 3125, pp. 64-68 : 65-66

Sparianthina parang sp. nov.

Figs 1–6

Type material. Holotype: 3 from 1.2 mi SW Speyside (11°27’ N; 60°34’ W), River Dam, King’s Bay, St. Paul Parish, Tobago, 10–17 May 1991, G. Hormiga, S.F. Larcher & T.R. Litwak leg. ( USNM). Paratypes: 33, 4Ƥ with the same data as holotype ( USNM).

Additional material examined. TOBAGO: St. Paul Parish: 11Ƥ, King’s Bay, River Dam, 1.2 mi SW Speyside (11°27’ N; 60°34’ W), 10–17 May 1991, G. Hormiga, S.F. Larcher & T.R. Litwak leg. ( USNM).

Etymology. The specific name is a noun in apposition. “ Parang ” is a popular folk music originating out of Trinidad and Tobago with Caribbean and Latin American cultural influences.

Diagnosis. Males of S. parang sp. nov. can be distinguished from those of the remaining species of the genus by the embolus, distally narrow and with a long, distally concave projection at the base ( Figs 1, 3 ) and by the RTA slightly widened distally with two dorsal projections ( Fig. 2 ). Females resemble those of S. selenopides by female epigynum with an anterior atrium wider than long (Jäger et al. 2009, fig. 14) but can be distinguished by the much narrower median septum, with lateral lobes touching each other posteriorly ( Fig. 4 ) and by the narrower internal duct system of the vulva ( Fig. 5 ).

Description. Male (USNM, holotype): Prosoma dark orange, brown along fovea and thoracic striae. Eye borders black. Chelicerae, legs and pedipalps dark orange. Sternum pale orange with slightly darker margins. Labium and endites orange, distally pale orange. Opisthosoma brownish gray. Dorsally with one pair of brown, round, muscular impressions on posterior half. Total length 5.0. Prosoma: 2.5 long, 2.4 wide. Opisthosoma slightly triangular: 2.4 long, 1.6 wide. Eye diameters: 0.16, 0.21, 0.15, 0.20; interdistances: 0.14, 0.06, 0.34, 0.38, 0.36, 0.30. Legs: I: 15.7 (4.2, 1.3, 4.7, 4.0, 1.5); II: 18.0 (4.9, 1.4, 5.4, 4.6, 1.7); III: 13.3 (3.7, 1.1, 3.8, 3.5, 1.2); IV: 15.3 (4.2, 1.1, 4.2, 4.4, 1.4). Spination: femora I–III p1-1-1, d0-1-1, r1-1-1; femur IV p1-1-1, d0-1-1, r0-0-1; tibiae I–II d1-1-1, v2-2 - 2-2-0; tibiae III–IV p1-0-1;, d1-0-1, r1-0-1, v2-2 -0; metatarsi I–II p1-0-0, r1-0-0, v2-2 -0; metatarsus III p1-1-0, r1- 1-0, v2-2 -0; metatarsus IV p1-1-2, r1-1-2, v2-2 -0. Palp: tibia slightly shorter than cymbium with one dorsal and three prolateral spines; VTA triangular and slightly retrolateral; cymbium scopulae inconspicuous; tegulum retrolaterally swollen; embolus with long thickened base from which arises an elongate, distally concave projection; conductor being a long, hyaline lamina; DTA distally concave and slightly bent retrolaterally ( Figs 1–3 ).

Female (USNM, paratype): Coloration as in male. Total length 6.4. Prosoma: 2.7 long, 2.7 wide. Opisthosoma: 3.6 long, 2.5 wide. Eye diameters: 0.15, 0.22, 0.17, 0.24; interdistances: 0.22, 0.08, 0.40, 0.44, 0.42, 0.20. Legs: I: 12.1 (3.4, 1.3, 3.5, 2.8, 1.1); II: 13.4 (3.9, 1.4, 3.8, 3.1, 1.2); III: 11.6 (3.2, 1.1, 3.8, 2.5, 1.0); IV: 12.1 (3.6, 1.1, 3.1, 3.1, 1.2). Spination as in male, except tibiae I–IV d0. Epigynum: epigynal plate longer than wide; median septum narrow, much longer than wide ( Fig. 4 ). Vulva: glandular projection small and rounded, arising close to copulatory opening; duct system anteriorly widened with two dorsal chambers and internally convoluted posteriorly; fertilization ducts very long ( Figs 5–6 ).

Variation. Males (n = 4): total length 4.5–5.0; prosoma length 2.1–2.5; femur I 3.7–4.2. Females (n = 10): total length 4.8–7.1; prosoma length 2.4–3.4; femur I 3.1–3.5.

Distribution. Only known from the type locality, in the island of Tobago.

Figures

FIGURES 1 – 6. Sparianthina parang sp. nov. 1 – 3 Male, left palp (1 ventral view, 2 retrolateral view, 3 detailed view of embolar region); 4 – 6 Female (4 epigynum, ventral view, 5 vulva, dorsal view, 6 schematic view of duct system). Scale lines: 0.5 mm.