Stemmops

Durán-Barrón, César G., Rosas, María V. & Contreras-Ramos, Atilano, 2013, Phylogenetic relationships of the comb-footed spider subfamily Spintharinae (Araneae, Araneoidea, Theridiidae), with generic diagnoses and a key to the genera, Zootaxa 3666 (2), pp. 171-193 : 187-188

Stemmops O. P.-Cambridge, 1894

( Fig. 9 B, C)

O. P.-Cambridge, 1894. Biologia Centrali-Americana, Araneidea, vol. 1, p. 125. Type species by monotypy: S. bicolor O. P.- Cambridge, 1894, ibid., pl. 17, fig. 5.

Diagnosis. Species of Stemmops present the posterior median eyes closer to the lateral eyes (Levi 1955) than between themselves ( Fig. 6 C, D). In all other spintharines their posterior median eyes are far from the lateral eyes. A sclerotized ring around the spinnerets is exclusive of this genus (Aganarsson 2004, figs. 63B, 74A).

Distribution. Mostly occur in warm parts of America, from U. S. A. to Brazil. Two species are found in China, Japan and Korea (Levi 1964b; Yaginuma 1969; Platnick 2013).

Material examined. Stemmops bicolor : U. S. A., Georgia, north of Sylvania, 15 April 1943, 1 Ƥ (AMNH). Stemmops orsus : PANAMA, [Province of Chiriquí], [Town] Boquete, 18 August 1950, A. M. Chickering, 1 Ƥ (paratype) (AMNH). Stemmops ornata : U. S. A., Ohio, Cantwell Cliffs near Rockbridge, 39° 37 N, 82° 33´W, 0 8 August 1935, W. M. Barrows & W. Ivie, 1 Ƥ (AMNH).

Figures

FIGURE 6. Carapace. A, Latrodectus geometricus Ƥ (dorsal view); B, L. geometricus Ƥ (lateral view); C, Stemmops orsus Ƥ (dorsal view); D, S. orsus Ƥ (lateral view).

FIGURE 9. Opisthosoma (dorsal view). A, Spintharus flavidus Ƥ; B, Stemmops orsus Ƥ; C, S. ornata Ƥ; D, Thwaitesia bracteata Ƥ.