Charinus souzai sp. nov.

urn:lsid:zoobank.org:act: 869B126A-1DF5-49FF-8619-851D88341869

Figs 43, 76–77; Table 4

Diagnosis

This species may be separated from other Charinus in eastern South America by means of the following combination of characters: compact habitus; reddish coloration; cheliceral claw with nine teeth; pedipalp tarsus with two spines (Fig. 76D); leg IV distitibia sc and sf series each with five trichobothria.

This species resembles C. brasilianus, but is smaller, with nine teeth on the cheliceral claw, compared with six or seven teeth in C. brasilianus . The male is unknown.

Etymology

Patronym honoring Dr Thiago Gonçalves-Souza for his contributions to arachnology and assistance in collecting arachnids in his home state of Espírito Santo, Brazil.

Type material

Holotype BRAZIL • ♀; Espírito Santo, Pancas, Fazenda Menezes; 19°13′21.83″ S, 40°51′19.95″ W; 27 May 2006; T.N. Bernabé and T.G. Souza leg.; MNRJ 9090.

Paratypes BRAZIL • 19 ♀♀; same collection data as for holotype; MNRJ 9090 .

Description

CARAPACE. Six anterior setae (Fig. 76A); frontal process triangular (Fig. 76C). Small granules densely scattered between ocular triads and among sulci. Median eyes well developed (Fig. 76C); median ocular tubercle reduced, with pair of setae; lateral eyes well developed, with seta posterior to lateral ocular triad; lateral ocular triad well separated from carapace margin.

STERNUM. Tritosternum projected anteriorly with typical setation, long, surpassing base of pedipalp coxae (Fig. 76B); other sternal platelets narrow and concave, with pair of setae anteriorly on plaque and some smaller setae posteriorly; pentasternum with four setae anteriorly and pair of setae near membranous region.

OPISTHOSOMA. Ventral sacs and ventral sac cover absent.

GENITALIA. Female genital operculum with short but prominent setae posteromedially (Fig. 77A–C); gonopod sucker-like, markedly sclerotized basally (Fig. 77A, C–D); constricted near apex, creating appearence of bottleneck (Fig. 77D); smooth border of genital operculum between gonopod and distal margin (Fig. 77E); slit sensilla on lateral margin of genital operculum (Fig. 77F). Male unknown.

CHELICERAE. Small tooth projecting slightly from retrolateral surface of basal segment, opposite to bifid tooth; retrolateral surface of chelieral claw with discontinous row of setae, extending basally to medially; claw with nine teeth; two rows of twelve setae on prolateral surface of basal segment; bifid tooth on basal segment with dorsal cusp larger than ventral cusp.

PEDIPALPS. Coxal dorsal carina with prominent setae encircled by round carina and three setae on margin. Femur with five dorsal spines and four or five ventral spines (Fig. 76E–F); spine between dorsal spines 2 and 3 in some specimens; two prominent setiferous tubercles between dorsal spine 1 and proximal margin; spine between ventral spine 1 and proximal margin. Patella with six dorsal spines in primary series (Fig. 76E); prominent setiferous tubercle distal to spine I, one-third length of spine I; four or five ventral spines (Fig. 76F); small setiferous tubercle between spine I and distal margin. Tibia with ventral spine distally and two setae between spine and distal margin. Tarsus with two dorsal spines, proximal spine half length of distal spine (Fig. 76D); cleaning organ with 29–30 setae in ventral row.

LEGS. Tibia of leg I with 23 articles; tarsus I with 41 articles; first tarsal article similar in length to subsequent articles. Leg IV basitibia with four pseudo-articles, with sclerotized, denticulate margin at apex of articles; trichobothrium bt situated in proximal third of pseudo-article; distitibia trichobothrium bc situated closer to sbf than to bf, sc and sf series each with five trichobothria.

Measurements

See Table 4.

Distribution

Known only from the type localities.

Natural history

Found under stones.