Longchuanacris microfurcula Niu et Zheng

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 : 56-58

Longchuanacris microfurcula Niu et Zheng , sp. nov.

( Figs. 7–12 , 15–16 )

Type materials. Holotype: male, CHINA: Xima, Yingjiang County, Yunnan Province, 24º47’ N, 97º42’ E, 1679 m, 31 Jul. 2010, collected by Yazhi Zhang. Paratypes: 10 males and 10 females, same data as holotype; 25 males and 20 females, same locality, 1500 m, 3 Aug. 2009, collected by Benyong Mao and Ming Qiu; 5 males and 1 female, Tongbiguan, Yingjiang County, Yunnan Province, 24º36’ N, 97º39’ E, 1450 m, 30 Jul. 2009, collected by Benyong Mao. Type specimens are deposited in SWFU, except 2 paratypes (1 male, No. IOZ(E)221421; 1 female, No. IOZ(E)221422) are deposited in IZCAS.

Diagnosis. The new species is similar to L. bidentata , as demonstrated by similar general appearance, especially by similar shape of furculae (furculae with apex acute; width between outer margins at base narrower than or nearly equal to half width of supra-anal plate), but can be distinguished from the latter by the characters listed in Table 3.

L. bidentata ( Zheng et Liang, 1985) L. microfurcula Niu et Zheng , sp. nov.

Hind femora with basal three fifths greenish yellow, Hind femora fully green, absence of an orange-red ring apical two fifths red before knee

Male cerci triangular, reaching to apex of supra anal plate Male cerci long-triangular, reaching beyond apex of

supra anal plate

Posterior margin of subgenital plate in female with two Posterior margin of subgenital plate in female nearly small teeth, and angularly protrudent between two teeth straight in middle and concave near lateral margins Epiphallus with lophi oblong; anterior projections with Epiphallus with lophi crescent; anterior projections with posterior sides nearly rounded in lateral view posterior sides nearly straight in lateral view

Etymology. The name is derived from the small furcula size in the male.

Description. Interocular distance 1.1–1.3 (1.22, on the average, n=5, male) or 1.3–1.7 (1.44, on the average, n=5, female) times as wide as frontal ridge between antennal sockets. Frontal ridge distinct and longitudinally shallowly furrowed throughout (male) or subobsolete below median ocellus (female); lateral margins nearly parallel, except finely expanded at median ocellus. Antennae reaching to coxa of hind leg (male) or not reaching to posterior margin of pronotum (female), middle segments 2.1–2.6 (2.36, ibid, male) or 1.4–1.8 (1.60, ibid, female) times longer than wide. Eyes oval, longitudinal diameter 1.4–1.6 (1.48, ibid, male) or 1.5–1.6 (1.58, ibid, female) times as horizontal diameter, and 2.0–2.2 (2.12, ibid, male) or 1.7–1.9 (1.78, ibid, female) times as subocular furrow. Pronotum with posterior margin obtusely angularly excised; median carina hardly indicated; prozona 2.4–2.7 (2.60, ibid, male) or 2.3–3.0 (2.54, ibid, female) times as long as metazona. Prosternal spine with apex subacute. Mesosternal lobes slightly wider than long; mesosternal interspace 2.3–2.7 (2.57, ibid, male) or 1.2–1.7 (1.53, ibid, female) times longer than wide. Tegmina 2.9–3.8 (3.30, ibid, male) or 2.9–3.2 (3.02, ibid, female) times longer than maximum width. Hind tibiae nearly cylindrical, with 8 external and 10 internal spines on dorsal side; external apical spine small.

Male genitalia. Furculae with basal half transverse and upright, apical half triangular and cephalically directed, width between outer margins at base observably narrower than half width of supra-anal plate ( Fig. 7 ). Supra-anal plate broadly shield-shaped, lateral areas with a process; posterior margin triangularly projecting in middle ( Fig. 7 ). Cerci long-triangular, compressed, surpassing distinctly apex of supra-anal plate, apex restricted, incurve and faintly bifurcated ( Fig. 8 ). Subgenital plate with apex obtuse. Epiphallus with crescent lophi; 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 not reaching to posterior margin of lophi in lateral view; bridge stout, posterior margin subacute in middle ( Figs. 10–12 ). Phallic complex with basal valves of penis not reaching to apex of apodeme in dorsal view.

Female genitalia. Subgenital plate with posterior margin nearly straight in middle and concave near lateral margins ( Fig. 9 ).

Coloration ( Figs. 15–16 ). Similar to L. macrofurcula , except for the following colouration patterns: tegmina black (male) or brown (female); hind femora green; hind tibiae and tarsi caerulescent.

Measurements (mm). Body length: male 16.5–17.5, female 19.3–21.3; pronotum length: male 3.0–3.2, female 3.6–4.2; tegmen length: male 2.6–3.4, female 2.9–3.4; hind femur length: male 8.9–9.5, female 10.2–11.2.

Distribution. China: Yunnan (Yingjiang).

Figures

FIGURES 7 – 12. Longchuanacris microfurcula Niu et Zheng, sp. nov .. 7. male terminalia, dorsal view; 8. male cercus and furcula, lateral view; 9. female subgenital plate, ventral view; 10 – 12. epiphallus, dorsal, anterior and lateral views. an = anchora; ap = anterior projection; cer = cercus; f = furcula; lo = 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.