Hydrolutos breweri Derka & Fedor

Derka, Tomáš & Fedor, Peter, 2012, Description of Hydrolutos breweri (Orthoptera: Anostostomatidae) female from Chimantá Massif (Venezuela), Zootaxa 3247, pp. 65-68 : 66-68

Hydrolutos breweri Derka & Fedor

Description of female.

Body dark brown. Head capsule, including mandibles, dark brown with 3 bright spots triangularly situated on frons, shiny and almost smooth, eyes black. Palpi light basally and distally, with dark middle section. Thorax and abdomen very dark brown dorsally, with light bands on terga (light area on pronotum). Legs brighter than body ( Figure 1 ).

Head: Antennal flagellum more than twice total body length (without ovipositor), proximally smooth, in middle and distal section swollen and covered by short grey fine microsetae. Fastigium as broad as antennal segment S1, dorsoventrally slightly flattened, not declinate, with a median carina. Vertex convex, clypeus subtriangular with median carina. Labrum heart-shaped, proximally broader than distally, with median carina in its apical half. Maxillary palps with the last segment swollen, bright and covered by short fine and soft microsetae. Eyes elevated in frontal view ( Figure 2 ).

Thorax: Pronotum slightly elevated over mesonotum, wider than long, bordered by a smooth rolled margin, containing both smooth and gently rugose areas. All thoracic sterna with 2 spines, prosternum: 2 moderate spines posterolaterally elevated, mesosternum: 2 spines posterolaterally elevated, metasternum: 2 distinct spines with no lateral elevation. Legs long, forecoxa with a moderate lateral spine, midcoxa with a short blunt spine, femora without spines. Fore tibiae dorsally with 2 spines subapically and 2 apically, ventrally with 2 rows of 5 spines (including the apical ones). Middle tibiae dorsally with a row of 4 spines on internal side and a row of 3 spines on external side, ventrally with 2 rows of 5 spines. Hind tibiae with 2 lateral combs of short but firm spines, dorsally with 2 pairs of distinct spines, ventrally with 2 moderate subterminal and 2 superior terminal spines. Tympanum elypsoid, brown. Abdomen: Abdominal apex and genitalia as on Figures 3 , 4 . Abdominal tergites smooth with fine transverse striae mesally and with posterior edges darker. Ovipositor long, slightly dorsad curved with smooth dorsal and ventral margins, the ventral margin bearing minute serrulation. Cerci conical but slim. Epiproct triangular with apex obtuse. Subgenital plate irregular hexagonal with hind margin slightly incised, forming two tiny lateral lobes terminally.

Measurements. Body length 42.0 mm (including ovipositor 55.0 mm), fastigium width 1.3 mm, interocular space 6.0 mm, antenna length 90.0 mm, pronotum length 10.3 mm, width 12.0 mm, hind femur length 36.0, width 8.5 mm max., 3.0 mm min, hind tibia length 36.0 mm, hind tarsus length 11.5 mm, hind tarsi length: I 5.0 mm, II 2.5 mm, III 2.1 mm, IV 1.9 mm, abdomen length (without ovipositor) 22.0 mm, ovipositor length 16.2, cerci length 3.6 mm, subgenital plate length 4.5 mm.

Diagnosis to distinguish Hydrolutos breweri species was published previously ( Derka and Fedor 2010), however it requires more detailed analyses on females described by Issa and Jaffe (1999). Clypeus of H. breweri is undisputedly subtriangular (in both sexes), as presented in the original description by Derka and Fedor (2010). Therefore "a triangular clypeus" mentioned in the Diagnosis ( Derka and Fedor 2010) has to be corrected as lapsus calami to "subtriangular".

Material examined. 1 female, Venezuela, Edo. Bolívar, Chimantá Massif, Churí tepui, Cueva Charles Brewer, ca 2,300 m a.s.l., May 2009.

Figures

FIGURE 1. female Hydrolutos breweri— a total view.

FIGURE 2. Head of female Hydrolutos breweri— a frontal view.

FIGURE 3. Genitalia of female Hydrolutos breweri— a ventral view.

FIGURE 4. Genitalia of female Hydrolutos breweri— a lateral view.