Anaxiphomorpha hexagona, Ma, 2018

Ma, Libin, 2018, Anaxiphomorpha hexagona sp. n., a new, unusual swordtail cricket collected from Motuo County, Xizang, China (Orthoptera: Grylloidea: Trigonidiidae: Trigonidiinae), Zootaxa 4418 (2), pp. 197-200 : 198-199

Anaxiphomorpha hexagona sp. n.

http://lsid.speciesfile.org/urn:lsid: Orthoptera .speciesfile.org:TaxonName:502735

Type materials. Holotype. Male, China ( Fig. 2-A, D ~F): Motuo, Xizang, 3–11 Sept., 2010, coll. Libin Ma ( SNNU) . Paratypes. China ( Fig. 2-B ~C): three females, Motuo, Xizang, 3–11 Sept., 2010, coll. Libin Ma ( SNNU) .

Measurements. Holotype: BL 5.30, HW 1.08, PL 0.75, PW 1.24, FWL 3.06, ML 1.69, HLL 3.18, CL 2.47; Paratype (n=3): BL 5.04±0.45, HW 1.52±0.14, PL 1.02±0.03, PW 1.52±0.04, FWL 3.41±0.40, HLL 4.01±0.22, CL 2.93±0.36, OL 2.06±0.30.

Etymology. The specific epithet “ hexagona ” refers to epiphallus armed with six significant branches.

Diagnosis ( Fig. 2 ). Male. Body size small. Clypeofrontal suture almost straight. Body yellowish, eyes, tarsal tips and basal abdomen dark brown. Fore tibia slender, armed with outer tympanum but a trace of the inner. Apex of hind femur armed with brown sclerites shaped as half moon. Hind tibiae with three paired spurs. Tegmina broad and flat; veins weak and thin, only chord veins colored brown.

Genitalia: epiphallus short and wide, with four apical lobes, the outer shaped as antlers (paired of basal sclerites slender, long and, in lateral view, curved upwards and shaped as a hook, its apex pointed posterior to body and armed with four thin and long hooks), the middle ones with ear-shaped ridges medially, curving downwards and armed with a pair of denticles distally. Ectoparamere developed, larger than epiphallus in lateral view. Each lobe of ectoparamere armed with several curved ridges, ornamented with denticles. Guide rod large, somewhat triangular shaped.

Female. Similar size and coloration to male, but tegmen, narrowed, soft and translucent. Ovipositor: medium and ventral parts colored brown to dark brown, dorsum brown and remainder yellowish. Dorsal margin armed with weak and thin tooth with squared top margin.

Remarks. Although the new species appears similar externally shape and presents nothing unusual in its coloration ( Gorochov, 1987; Liu & Shi, 2015), it has peculiar and complex concealed male genitalia. All other known species bear a simple, uncomplicated epiphallus, but this species possesses an epiphallus with numerous lobes and branches.

Figures

FIGURE 2. Anaxiphomorpha hexagona, habitus and morphological structures. A, Adult male. B, Adult female. C, Ovipositor.D. Male genitalia, dorsal view. E, male genitalia, lateral view. F, Male genitalia, ventral view.