Asarcus longipes

Asarcus
Asarcus longipes Kollar, 1839. Photograph of male, fresh material. From Yamaguti & Pinto-da-Rocha, 2009
Suborder	Laniatores
Superfamily	Gonyleptoidea
Family	Gonyleptidae
Subfamily	Bourguyiinae
Genus	Asarcus

Asarcus longipes Kollar, 1839 is a species of the genus Asarcus C. L. Koch, 1839. It is the types species of the genus.

 Distribution

From São Paulo and Rio de Janeiro states in Brazil.

Original description

According to Yamaguti & Pinto-da-Rocha 2009

Male: Measurements (N = 5). Dorsal scutum: length, 6.2–6.7; width, 6.1–6.7; anterior margin width, 2.5– 3.0; posterior margin width, 4.2–4.6. Leg lengths: I, 15.2–19.3; II, 36.8–49.3; III, 26.6–34.4; IV, 57.1–73.7. Femora lengths: I, 14.5–19.3; II, 11.5–15.5; III, 8.7– 11.3; IV, 17.8–22.7.

Dorsum (Figs 13, 32, 114). Ocularium with median tubercle very small, hard to see. Free tergites II and III with median spines, ad with the spine of free tergite II about twice the length of the spine of free tergite III.

Legs (Figs 13, 51, 70, 114). Coxa IV very narrow, covered almost entirely by dorsal scutum, only apex visible. Conspicuous granules present laterally. Tro- chanter IV with two small ventral median spines.

Penis (Figs 95, 96). Dorsal process absent. Ventral process slightly trilobed, fan-shaped over 180°. The apex is ramified: branches are thick and straight. Apex of stylus slightly dorsally curved.

Coloration (live) (Fig. 114). Dorsal scutum, free tergites, and chelicerae yellow, prosoma a little darker. Small black spots sparsely distributed on whole dorsum and femur IV, larger on femur. Dorsal scutum and free tergite margins darker. Pedipalpus dark yellow. Leg coxae yellow, light brown towards apex. Spines, apophyses, and granules darker.

Dry marks (Fig. 114). Very reduced, only a few white spots dispersed on dorsum. Y-shaped stain behind the ocularium can be reduced. One pair of stains on lateral margin of prosoma, at ocularium sides.

Female (Figs17, 33, 55, 74, 118): Measurements (N = 5). Dorsal scutum: length, 6.0–6.8; width, 6.1– 6.9; anterior margin width, 2.4–2.7; posterior margin width, 5.0–5.6. Leg lengths: I, 11.2–13.3; II, 27.7– 32.9; III, 19.3–23.6; IV, 29.9–36.3. Femora lengths: I, 2.1–3.5; II, 7.8–9.4; III, 5.8–7.6; IV, 7.8–9.6. Free tergite II with median spine; free tergite III with small spine or median tubercle. Trochanter IV with two dorsal apophyses, with distal one a little larger than basal one. Femur IV almost straight, with two distal rows of ventral spines.

Comparison: Differs from other Bourguyiinae species in having a very narrow coxa IV (Fig. 13), reduced dry marks (Fig. 114), and the small median tubercle of ocularium (Fig. 13). Male differs from other Bour- guyiinae species in having the spine of free tergites just a little curved ventrally (Fig. 32).

References

Koch, C.L. (1839b) Die Arachniden getreu nach der Natur abgebildet und beschrieben. Band 7. C. H. Zeh'schen Buchhandlung, Nürnberg, pp. 1–130, 36 pls.