Caecina sinica Cui, Li & Cai

Cui, Jianxin, Li, Hu & Cai, Wanzhi, 2008, The discovery of the genus Caecina Stål (Hemiptera: Reduviidae: Ectrichodiinae) from China, with the description of a new species, Zootaxa 1727, pp. 44-48 : 45

Caecina sinica Cui, Li & Cai , sp. nov.

( Figs.1–9 )

Description. Color. Yellowish brown. Eyes blackish brown; irregular markings on head beneath reddish; membrane darkish brown.

Structures. Body ovate, covered with closely long setae. Head rhombic in dorsal view. Vortex even. Transverse constriction slightly behind posterior margin of eyes. Interocellar space shorter than diameter of ocellus. Distance between ipsilateral ocellus and eye about 1.5 times as long as diameter of ocellus. Antenna with long setae, length of setae about 3–4 times diameter of corresponding antennal segment; first segment obviously longer than head, and slightly shorter than pronotum; second segment about 0.75 times as long as first. Eyes prominent, reniform. Anteocular portion shorter than postocular portion (excluding neck). First rostral segment extending beyond posterior margin of eye; first and second rostral segments subequal in length. Pronotum nearly triangular; anterior lobe with many stout, short, nearly same-sized spines; anterior angle of pronotum with a spine and another spine closely posterior to it; anterior margin with 2 medium-sized spines; posterior part of lateral margins of anterior lobe with obvious spines; posterior lobe coarse, with longitudinal depression not reaching posterior margin; lateral margins of posterior pronotal lobe smooth, lateral angles round. Legs clothed with long setae, third tarsomere slightly longer than first two tarsomeres combined. Scutellum trapezoidal, apical prongs of scutellum well separated basally. Membrane of hemelytron extending beyond apex of abdomen. Anterior region of each abdominal sternum with distinct, coarse transverse depression, this with many longitudinal crenulations ( Fig. 3 ); lateral margins of second to sixth sterna each with a round depression. Sterna of third to sixth abdominal segments with shallow, longitudinal groove at middle. Pygophore stout, apex of median process rounded ( Figs. 4–5 ); paramere clavate, inner side of apex with a process ( Fig.6 ); pedicel of phallus somewhat long and wide, basal plate shorter than pedicel ( Fig. 7 ); phallosoma ovate, struts separated basally and fused distally ( Figs. 8–9 ).

Measurements [in mm., ♂ (n= 1)]. Body length 10.9, width 3. 0; length head 1.5, width 1.2; length antennal segments I: II: III: IV=1.9: 1.5: 0.5: 0.4 (apical segments missing); length pronotum 2.9, width 2.4; length scutellum (excluding prongs) 0.65, width 1.3; length corium 4.6, width 1.5; length forewing 7.6, width 2.9; length rostral segments I: II: III =1.1: 1.0: 0.4.

Material examined. Holotype, ♂, China, Xizang, Motuo, Kabu, 1070 m, 7-V-2005.

Distribution: China (Xizang).

Etymology: The species name comes from the location of the holotype.

Notes. It is easy to distinguish this species from its congeners. The pronotal collar of the new species is not distinct as it is in most species of this genus. The anterior margin of the collar has 2 medium-sized spines, whereas this margin is often smooth in most species of this genus.

Figures

FIGURE 1. Caecina sinica sp. nov. ♂, holotype. Habitus. Scale bar = 2.0 mm.

FIGURES 2 – 9. Caecina sinica sp. nov. ♂, holotype. 2, Head and pronotum, antennae partly removed; 3, abdomen; 4 – 5, pygophore; 6, paramere; 7, phallus; 8 – 9, phallosoma; 2, 3, 5, 7, lateral view; 8, dorsal view; 4, 9 ventral view. Scale bar of 2 = 1.5 mm; of 3 = 2.0 mm; of 4, 5 = 0.8 mm; of 6 – 9 = 0.5 mm.