Loxoblemmus rectilineus Ma & Qiao, 2020

Qiao, Min, Zhang, Tao, Wang, Yan & Ma, Libin, 2020, A new species of Loxoblemmus Saussure, 1877 and a new distribution record of the genus Stephoblemmus Saussure, 1877 from China (Orthoptera: Gryllidae; Gryllinae), Zootaxa 4732 (3), pp. 481-487 : 484-485

Loxoblemmus rectilineus Ma & Qiao sp. n.

( Figs 4 A–B; 5A–C;6B; 7)

urn:lsid:zoobank.org:act:102DE6D2-1E4F-426E-AA79-C37E4989ECEB

Measurements. Male (n=2): BL 12.18±1.01, HL 2.27±0.54, HW 4.68±0.49, PL 2.3±0.5, PW 4.20±0.44, FWL 5.89±0.42, HFL 8.52±1.05

Type material. Holotype: male, China: Yunnan Province, Xishuangbanna , botanical garden, 19 October 2014, Zhang Tao coll. ( SNNU) . Paratypes: male, China: Yunnan Province, Mengla District, Wangtianshu , 12–23 October 2014, Zhang Tao coll. ( SNNU) .

Etymology. The specific epithet “ rectilineus ” refers to male’s frons truncated apically.

Diagnosis ( Fig. 4 ). Male. Stout and sized medium of the genus. Head broader than pronotum, occiput slightly convex, with three pairs of inconspicuous stripes, frons slightly produced forwards, strongly broad, about 3 times as board as antennal scape. Face wide, flattened, strongly oblique. Median ocellus rounded. Labrum shield-shaped with rounded apical margin. Antennal scape armed with small, but distinct process apically. Pronotum transverse, slightly wider than length, and with anterior margin somewhat concave. Elytra reaching to the apex of abdomen, basal field small, as half the length of pronotum. Oblique veins two; mirror oval, longer than broad, undivided. Apical field rather short. Fore tibiae armed with both inner and outer tympanum. The outer one developed and long-oval shaped and the inner very small. Posterior tibiae armed with five spines on each side dorsally.

Coloration: Head brown, occiput ornamented with 6 yellow stripes and the tip of frontal rostrum ornamented with a transverse band with similar color. Pronotum distributed with yellowish spots. Antennal scape and antennae brown, eyes blackish and areas around ocellus yellowish brown. Maxillary palpi yellowish, anterior and posterior femora spotted with brown. Cercus brown.

Genitalia ( Fig. 5 ): Epiphallic apex hirsute. Middle lobe of epiphallus W-shaped, shorter than lateral lobes. Tip of lateral lobe rather pointed and curve inwards. Lateral margin of ectoparamere sclerotized with inner portions lucent and membranous.

Remarks. The new species is similar to L. reticularus , but the two could be distinguished as follows: head of L. rectilineus wider than pronotum, that of L. reticularus as wide as pronotum; antennal scape of L. rectilineus armed with small process instead of a long and slender hook-shaped process; genae of L. rectilinleus not strongly inflated, but that of L. reticularus distinctly expanded laterally. Compared to L. taicoun and L. macrocephalus , L. rectilinleus could be identified by comparing the frons. L. rectilinleus has the frons margins flattened, not rounded as the other two. And genitalia of L. rectilinleus is also similar to L. jacobsoni . Middle lobes of epiphallus of these two species are somewhat similar, but their ectoparameres are conspicuously different ( Fig. 6 ).

Figures

FIGURE 4. Body and head of L. rectilineus. A. male body; B. front view of head; C. lateral view of head. Scale bar: 10mm.

FIGURE 5. Genitalia of L. rectilineus. A. ventral view; B. dorsal view; C. lateral view.

FIGURE 6. Genitalia of L. jacobsoni and L. rectilineus. A. L. jacobsoni; B. L. rectilineus