Sedulia perakensis Willemse, 1932

Tan, Ming Kai, Robillard, Tony & Kamaruddin, Khairul Nizam, 2016, Revision of the grasshopper genus Sedulia Stål, 1878 (Acrididae: Catantopinae) from Malay Peninsula, Zootaxa 4107 (2), pp. 255-266 : 256-258

Sedulia perakensis Willemse, 1932

( Figs. 1 , 2 )

http://lsid.speciesfile.org/urn:lsid: Orthoptera .speciesfile.org:TaxonName:56383

Sedulia perakensis Willemse, 1932: 282 ; Willemse 1957: 368; Storozhenko 2009: 19.

Type material. Holotype: female, Peninsular Malaysia, Perak, coll. Buxton, 1919 (MNHN-EO-CAELIF2471) [examined].

Remarks. The original description by Willemse (1932) was mainly colouration and patterns. Since the description of the female genitalia parts was not available, we redescribe the female holotype, with focus on the female genitalia parts. We also provide a new diagnosis for the species. The male of this species remain unknown and the genus status requires further testing using male characters (male abdominal apex and genitalia).

New diagnosis. Tegmen brachypterous, veinlets dense and with angular apex; cerci compressed and gently outcurved, in apical third suddenly narrowed, with pointed apex.

Redescription of female holotype. Habitus as shown in Fig. 1 . Head considerably shorter than pronotum ( Fig. 1 B). Frontal ridge narrow, parallel-sided above median ocellus and distinctly broadened below this ocellus. Eyes large. Antennae made of 20 segments, reaching middle of pronotum. Pronotum with four transverse furrows, increasingly distinct and complete posteriorly ( Fig. 1 ); prozona 1.45 times as long as metazona; anterior margin of prozona and posterior margin of metazona angularly rounded; lateral carinae absent; median carina distinct. Prosternal spine straight, conical, with obtuse apex. Hind wings absent. Hind femora stout, 3.87 times as long as maximal width of these femora; dorsal carina serrated. Hind femora 1.17 times longer than hind tibiae. Hind tibiae with seven outer dorsal spines and seven inner dorsal spines; outer apical dorsal spine absent. Tympanum large, oval.

Female. Tegmen brachypterous, veinlets dense and with angular apex, not touching each other in rest position, reaching the hind margin of fourth tergite ( Fig. 2 A). Tenth tergite with two membranous rounded lateral lobes along the middle of the posterior margin ( Fig. 2 B). Epiproct elongated, separated into two parts by a middle sulcus, with obtuse apex ( Fig. 2 B). Cerci compressed and gently outcurved, in apical third suddenly narrowed, with pointed apex ( Figs. 2 B, 2C). Subgenital plate elongate; posterior margin with large median angular projection and with lateral excisions ( Fig. 2 D). Ovipositor short, hook-like; dorsal valves smooth with apex gently curved dorsad; ventral valves with apex bent ventrad ( Fig. 2 C).

Male. Unknown.

Colouration. Body brown, with light brown and some blackish pattern. Head, including frons and antennae light brown to brown. Posterior part of the eye with a pale yellow stripe that continues to the lateral lobe of pronotum. Disc of pronotum brown, with black spots spaced out along posterior margin and sometimes anterior margin; lateral lobes with black spots spaced out along margins, brown with light brown stripe in dorsal part, beneath the light brown stripe is a dark stripe. Light brown and blackish stripe of lateral lobe continue along lateral side of thoracic segments. Tegmen brown with large and shining black spot in the middle of tegmen. Fore and mid legs brown with some darker patches. Hind femur brown with black irregular spots along ventrolateral area. Hind tibia brown; its spines dark brown to black. Abdominal tergites brown with black patterns; with lateral black spots along ventro-lateral margins of each tergite; abdominal sternites red brown in the middle, sometimes with yellow stripes laterally. Thoracic sternites dark brown anteriorly to pale brown posteriorly.

Measurements (in mm). BL = 28.7; PL = 8.6; PZL = 5.1; MZL = 3.5; PW = 5.8; TL = 7.1; TW = 3.5; HFL = 20.0; HFW = 5.2; HTL = 17.1.

Distribution. Peninsular Malaysia (Perak).

Figures

FIGURE 1. Sedulia perakensis Willemse, 1932: female holotype habitus in lateral (A) and dorsal (B) views. Scale bars: 1 mm. Images by Simon Poulain.

FIGURE 2. Sedulia perakensis Willemse, 1932: tegmen in lateral view (A), abdominal apex in dorsal (B), lateral (C) and ventral (D) views. Scale bars: 1 mm. Images by Simon Poulain.