Charinus brescoviti, Giupponi & Miranda, 2016

Giupponi, Alessandro Ponce de Leão & Miranda, Gustavo Silva de, 2016, Eight New Species of Charinus Simon, 1892 (Arαchnidα: Amblypygi: Chαrinidαe) Endemic for the Brαziliαn Amαzon, with Notes on Their Conservαtionαl Stαtus, PLoS ONE (e 0148277) 1892 (2), pp. 1-33 : 3-6

publication ID	https://doi.org/ 10.1371/journal.pone.0148277
DOI	https://doi.org/10.5281/zenodo.12820260
persistent identifier	https://treatment.plazi.org/id/03C48786-4466-CB44-5E71-F89DFBFEF9C7
treatment provided by	Felipe
scientific name	Charinus brescoviti
status	sp. nov.

Treatment

Charinus brescoviti View in CoL new species. urn:lsid:zoobank.org:act:ED0B1B23-2274-449F-B9EE-EDAE43A48902

( Figs 1A–1E View Fig 1 , 2A View Fig 2 , 3A View Fig 3 and 4A View Fig 4 )

Etymology. This species is named after Dr. Antônio Domingos Brescovit (Instituto Butantan, SP, BR), in recognition of his contribution to arachnology.

Type material. Holotype: BRAZIL: Amazonas : Araçá River, Piaçaba, 18.v.1982, B. Mascarenhas (Female, IBSP 149 ) . Paratypes: BRAZIL: Amazonas : Araçá River, Piaçaba, 18.v.1982, B. Macharenhas (1 female, IBSP 149 ; 1 female and 1 juvenile, MNRJ 9186 ) .

Diagnosis. Well-developed median and lateral eyes; small and rounded meta and mesosternum; large basal spine pedipalp distitarsus (2/3 the distal length); basitibia of leg IV divided in two pseudo articles; trichobothria of basitibia IV (bt) on the proximal third of the article; distitibia IV with 16 trichobothriae, equidistant basal trichobothria (bf, bc and sbf); brownish-yellow body color; cushion-like gonopods with small lateral projections directed backwards and internal seminal receptacles.

Description. Carapace ( Fig 1A View Fig 1 ): flattened, wider than longer (ratio approximately 4/5). Prominent lateral and median eyes; from the median eyes starts a thin median furrow that reaches around the median area of the lateral hump pair, behind the lateral eye spots. Anterior margin with 6 small setae. Corners of anterior margin extending downwards in a wide, roundish boss. Many tiny punctuations, more abundant in the frontal area. Three pairs of deep furrows and a deep, oval fovea. First pair of furrows placed just behind the lateral boss and not reaching the middle line. Lateral eyes without cornea and clearly defined lens (only a small roundish knob). Frontal process well developed, much longer than wider, with blunt, reborded apex.

Sternum ( Fig 1B View Fig 1 ). Tri-segmented, all pieces weakly sclerotized. Tritosternum with a round basis and projected anteriorly in a small blunt tubercle, which reaches the base of the chelicerae, with 2 apical, 2 median and 2 basal setae. Middle piece rounded, convex, with 2 setae. Third piece rounded and convex, subequal to the middle piece, with two setae. Sternites separated from each other by the diameter of the middle piece.

Abdomen ( Fig 1A View Fig 1 ). Oblong, with almost indistinguishable punctuations, finer than that on the carapace.

Chelicera ( Fig 2A View Fig 2 ). Cheliceral furrow with 4 internal teeth; first tooth bifid, Ia slightly bigger than Ib. Second and third teeth subequal. Fourth tooth twice as long as the others and stouter. Teeth length: IV>Ia>Ib = II>III. Claw with 6 denticles, the basal larger.

Pedipalp. Trochanter ( Fig 1D and 1E View Fig 1 ): large ventral apophysis on the posterior border of the article, spiniform, bearing seven large setae, and with a blunt tip pointed forwards; two subequal spines, one at the median third and the other at the distal tip of the prolateral face. Femur ( Fig 1D and 1E View Fig 1 ): 3–4 dorsal spines (I>II>III>IV) with two prominent setiferous tubercle before the first spine; 4 ventral spines (main series) with one small accessory spine before the first, this the same size of spine IV (I>II>III>IV). Tibia ( Fig 1D and 1E View Fig 1 ): dorsal main series with three spines (I>II>III); small accessory spine before the first spine; spine II two thirds spine I and spine III one third the size spine I. Spine I with a setiferous tubercle on its first third. 2 ventral spines, the proximal two thirds the distal. Basitarsus ( Fig 1C, 1D and 1E View Fig 1 ): 2 dorsal spines, the basal 2/3 the distal. 1 ventral spine at the distal half, subequal to the dorsal basal spine. Distitarsus ( Fig 1C View Fig 1 ): with 2 large curved spines, the distal half the size of the article, and the basal half distal spine. Cleaning organ about ½ the article length. Claw ( Fig 1C View Fig 1 ): long, with an acute, curved tip.

Legs. All setose. Ventral corner of the prolateral face of femora II-IV projecting in a distinct spiniform process. Femur length I>III>IV>II. Tibia I with 23 articles. Tarsus (basitarsus+distitarsus) I with 37–39 articles. Leg IV: Basitibia: divided into 2 pseudo-articles, with one trichobothrium on both pseudo-segments; the trichobothrium of the proximal pseudo-article is between the median and the distal third; the trichobothrium of the distal pseudo-article is on the basal third. Distitibia ( Fig 3A View Fig 3 ): 3 basal and 13 distal trichobothria (total of 16); trichobothrium bc half way to bf and sbf. Basitibia-distitibia length DT>BT1>BT2.

Measurements. Female (n = 3): Cephalothorax: Length: 2.1 mm (2.0–2.3), Width: 2.9 mm (2.8–3.0). Abdomen: 2.6 mm (3.1–4.0). Pedipalp: Femur 1.9 mm (1.5–2.1), Tibia 1.2 mm (1.6– 2.2), Basitarsus 0.9 mm (0.7–1), Distitarsus 0.7 mm (0.6–0.7), Tarsal claw 0.5 mm (0.4–0.6).

Color pattern (in alcohol). Chelicerae, pedipalps and carapace yellowish-brown. Legs light yellowish-brown. Abdomen pale yellow. Color of live animals unknown.

Genitalia. Female gonopod ( Fig 4A View Fig 4 ) cushion-like, with small lateral thin projections pointing backwards, resembling claws; projections not sclerotized; atrium not covered by the lateral projections, and with several glandular openings.