Longchuanacris lobata Niu et Ou

Mao, Ben-Yong, Niu, Yao, Ou, Xiao-Hong, Zheng, Zhe-Min & Scott, Matthew B., 2011, A taxonomic study of the genus Longchuanacris Zheng et Fu (Orthoptera: Acrididae: Catantopinae), with descriptions of two new species from Yunnan, China, Zootaxa 3118, pp. 51-61 : 54-56

Longchuanacris lobata Niu et Ou , sp. nov.

( Figs. 1–6 , 13–14 )

Type materials. Holotype: male, CHINA: Tongbiguan, Yingjiang County, Yunnan Province, 24º36’ N, 97º39’ E, 1450 m, 30 Jul. 2009, collected by Benyong Mao. Paratypes: 5 males and 2 females, same data as holotype; 2 males and 3 females, same locality, 24º37’ N, 97º39’ E, 1314 m, 29 Jul. 2010, collected by Yazhi Zhang; 2 males and 3 females, same locality, 1150–1260 m, 24 Oct. 2003, collected by Xiaohong Ou, Ruihao Qin and Changsheng Zuo; 9 males and 5 females, CHINA: Xima, Yingjiang County, Yunnan Province, 1400–1500 m, 18–20 Oct. 2003, collected by Xiaohong Ou and Yingxian Situ. Type specimens are deposited in SWFU, except 2 paratypes (1 male, No. IOZ(E)221419; 1 female, No. IOZ(E)221420) are deposited in the Institute of Zoology, Chinese Academy of Sciences, Beijing, China ( IZCAS).

Diagnosis. The new species is similar to L. macrofurcula as demonstrated by similar general appearance, especially by furculae with apex broadly rounded, but its male can be distinguished from the latter by the characters listed in Table 2.

Hind femora yellowish green, with an orange-red ring before Hind femora fully green, absence of an orange-red ring before hind-knee knee

Male cerci with apex bilobate, inner lobe finely longer than Male cerci with apex bilobate, inner lobe more longer than outer lobe outer lobe

Apex of furculae smooth, sometimes preapical-inner angle Apex of furculae with preapical-inner angle forward curved finely curved forward as a styliform projection

Etymology. The species name refers to the cerci of male with a dorso-internal apical lobe.

Description. Interocular distance 1.1–1.3 (1.22, on the average, n=5, male) or 1.3–1.4 (1.33, on the average, n=5, female) times as wide as frontal ridge between antennal sockets. Lateral margins of frontal ridge nearly parallel, except finely expanded at median ocellus. Antennae reaching to base of hind femora (male) or posterior margin of pronotum (female), mid segments 2.4–2.8 (2.64, ibid, male) or 2.1–2.3 (2.17, ibid, female) times longer than wide. Eyes longitudinal diameter 1.3–1.4 (1.38, ibid, male) or 1.5–1.6 (1.53, ibid, female) times as horizontal diameter, and 2.3–2.7 (2.48, ibid, male) or 1.9–2.0 (1.93, ibid, female) times as subocular furrow. Pronotum with posterior margin obtusely angularly excised; prozona 2.1–2.8 (2.44, ibid, male) or 2.2–3.0 (2.50, ibid, female) times as long as metazona. Prosternal spine with apex acute. Mesosternal lobes slightly wider than long; mesosternal interspace 1.8–2.9 (2.28, ibid, male) or 1.1–1.3 (1.17, ibid, female) times longer than minimum width. Tegmina 2.3–2.6 (2.40, ibid, male) or 2.7–3.1 (2.90, ibid, female) times longer than maximum width. Hind tibiae with 8 external and 9–11 internal spines on dorsal side; external apical spine small.

Male genitalia. Furculae large, upright and oblong, width near apex broader than or equal to that at base, apical margin with preapical-inner angle forward curved as a styliform projection ( Figs. 1–2 ). Supra-anal plate with posterior margin triangularly projecting ( Fig. 1 ). Cerci long-triangular, compressed, reaching to or finely beyond apex of supra-anal plate; apex incurve and bilobate or with at least faint bifurcation, inner lobe more distinct than outer lobe ( Figs. 1 ). Subgenital plate conical; apex obtuse. Epiphallus with outer lophi oblong; anchorae small with apex obtuse; anterior projections with posterior sides nearly straight in lateral view; lateral plate with external margin weakly concave, posterior projection distinctly narrow and backwards reaching to or beyond posterior margin of outer lophi in lateral view ( Figs. 4–6 ). Ectophallic membrane with an extra, spoon-shaped sclerite. Phallic complex with basal valves of penis reaching to apex of apodeme in dorsal view.

Female genitalia. Subgenital plate with posterior margin nearly straight with two small obtuse dentes near lateral margins ( Fig. 3 ).

Colouration ( Figs. 13–14 ). Similar to L. macrofurcula , except for the following colouration patterns: tegmina black (male) or brown (female); hind femora yellowish green, absence of an orange-red ring before black knee; abdominal tergites bluish green.

Measurements (mm). Body length: male 17.7–19.0, female 20.7–21.9; pronotum length: male 3.1–3.4, female 4.3–4.5; tegmen length: male 2.7–3.3, female 3.1–3.2; hind femur length: male 9.7–10.4, female 12.2–12.7.

Distribution. China: Yunnan (Yingjiang).

Figures

FIGURES 1 – 6. Longchuanacris lobata Niu et Ou, sp. nov.. 1. male terminalia, dorsal view; 2. male cercus and furcula, lateral view; 3. female subgenital plate, ventral view; 4 – 6. epiphallus, dorsal, anterior and lateral views. an = anchora; cer = cercus; f = furcula; ilo = inner lophus; olo = outer lophus; pp = posterior projection; sa = supra-anal plate. Scale bars = 1 mm.

FIGURES 13 – 17. Habitus, lateral view. 13 – 14. Longchuanacris lobata Niu et Ou, sp. nov., male, female; 15 – 16. Longchuanacris microfurcula sp. nov., male, female; 17. Longchuanacris guangxiensis Zheng et Ren, 2007 (= Caryanda neoelegans Otte, D. 1995), male. Scale bars = 1 mm.