Euthycaelus Simon 1889

Guadanucci, José Paulo Leite & Weinmann, Dirk, 2014, The spider genera Euthycaelus Simon and Schismatothele Karsch (Mygalomorphae, Theraphosidae), Zootaxa 3795 (3), pp. 275-288 : 276

Euthycaelus Simon 1889

Euthycaelus Simon 1889: 200 (description of ♀; Rudloff 1997: 7 (removed from the synonymy with holothele, Contra raven, 1985:153). Platnick (2013) did not follow Rudloff’s proposal because of the lack of a detailed diagnosis.

Type-species. Euthycaelus colonicus Simon 1889 , by subsequent designation by Simon 1892:128.

Species included. Euthycaelus colonicus Simon 1889 , E. norae sp. nov., E. amandae sp. nov.

Diagnosis. Males and females resemble those of the genus Schismatothele , and can be recognized by palpal tibia being swollen and bearing several spines on the apical retrolateral surface; tridimensional, heavily sclerotized spermathecae. They differ from those of Schismatothele by the following features: palpal tibia with two rows of thick spines; male palpal bulb elongated, subtegulum separated from tegulum; male tibial apophysis with retrolateral branch very long; spermathecae composed of a pair of single receptacles.

Description. Carapace oval, longer than wide; moderately pilose. Cephalic region slightly raised. Eye group rectangular, anterior eye row procurved, posterior slightly recurved. Fovea deep, straight or procurved. Labium subquadrate, with ca. 100 cuspules densely concentrated on anterior half. Labiosternal junction moderately deep; sigilla oval, distinct and located near junction. Sternum rounded, with conspicuous bulge near labiosternal junction; posterior sternal sigilla oval and away from margin. Male palpal tibia swollen, with thick spines on retrolateral surface, disposed in two rows. Male tibial apophysis comprising two branches. Male metatarsus I bending externally to retrolateral branch of tibial apophysis. Scopulae on tarsi III–IV, on both sexes, divided by band of thick setae. Superior tarsal claws of males and females without teeth or with median row of small teeth; inferior tarsal claws absent. Tarsi IV cracked on males and females. Cymbium longer than wide, bilobed. Palpal bulb with short embolus, large subtegulum, separated from tegulum. Spermathecae strongly sclerotized, comprising two receptacula. Abdomen coloration uniformly brown; abdominal markings absent.