Tiyantiyana sunipenis, Cigliano & Pocco & Lange, 2011

Cigliano, María Marta, Pocco, Martina E. & Lange, Carlos E., 2011, Grasshoppers of the Andes: new Melanoplinae and Gomphocerinae taxa (Insecta, Orthoptera, Acrididae) from Huascarán National Park and Callejón de Huaylas, Ancash, Peru, Zoosystema 33 (4), pp. 523-544 : 530-531

Tiyantiyana sunipenis n. gen., n. sp. ( Figs 1 ; 4 ; 10 )

TYPE MATERIAL. — Peru. Ancash, Pque. Nac.Huascarán, Sector Carpa, 5 km before Nevado Pastoruri, 4660 m, 09°53’00”S, 77°12’04.2”W, 14. V.2004, Cigliano & Lange, holotype ♂ and allotype ♀ ( MLPA).

PARATYPES. — Peru. Ancash, 3 km from detour to Chiquián to Conococha, 4226 m, 10°04’53.3”S, 77°12’53.8”W, 1.III.2008, Cigliano & Lange, 2 ♂♂, 2 ♀♀ ( MNHN)), 3 ♂♂, 8 ♀♀ ( MLPA). — Ancash, detour to Chiquián, 4062 m, 10°06’32.1”S, 77°11°08.9”W, 15. V.2004, Cigliano & Lange, 1 ♀ ( MLPA). — Ancash, Pque. Nac. Huascarán, Sector Carpa, 5 km before Nevado Pastoruri, 4660 m, 09°53’00”S, 77°12’04.2”W, 14. V.2004, Cigliano & Lange, 2 ♂♂, 4 ♀♀ ( MNHN), 6 ♂♂, 20 ♀♀ ( MLPA). — Ancash, 8 km from Catac on Road to Chavin, 3786 m, 09°45’23.6’’S, 77°23.4’48.5’’W, 26.II.2008, Cigliano & Lange, 1 ♂, 1 ♀ ( MLPA). — Ancash, Abra Yanashallash on road to La Union, 4644 m, 09°52’00.2”S, 77°04’39.5”W, 15. V.2004,

Cigliano & Lange, 1 ♀ ( MLPA). OTHER MATERIAL EXAMINED. — Peru. Ancash, 3 km

from detour to Chiquián to Conococha, 4226 m, 10°04’53.3”S, 77°12’53.8”W, 1.III.2008, Cigliano & Lange, 1 ♂, 14 ♀♀, 2 nymphs ( MLPA). — Ancash, Callejón de Huaylas, Conococha, 4146 m, 10°07’42.2”S, 77°17’52.7”W, 11. V.2004, Cigliano & Lange, 1 ♀ ( MLPA). — Ancash, Pque. Nac.Huascarán, Sector Carpa, 5 km before Nevado Pastoruri, 4660 m, 09°53’00”S, 77°12’04.2”W, 14. V.2004, Cigliano & Lange, 3 ♂♂, 19 ♀♀, 3 nymphs ( MLPA). — Ancash, 8 km from Catac on Road to Chavin, 3786 m, 09°45’23.6’’S, 77°23.4’48.5’’W, 26.II.2008, Cigliano & Lange, 1 ♂, 1 ♀ ( MLPA).

TYPE LOCALITY. — Peru, Ancash, Pque. Nac. Huascarán, Sector Carpa, 5 km before Nevado Pastoruri, 4660 m, 09°53’00”S, 77°12’04.2”W.

ETYMOLOGY. — “Suni” means long in Quechua native language referring to the length of the valves of the aedeagus.

DISTRIBUTION. — Peru. Ancash ( Fig. 10 ).

HABITAT. — According to our observations, Tiyantiyana sunipenis n. gen., n. sp. inhabits puna grassland areas with bunchgrasses of Festuca and Poa forming tussocks. Spaces around the tussocks filled by numerous cushion and rosette herbs, including non-tussock-forming grasses and sedges, prostrate or low-growing forbs.

DIAGNOSIS. — Very small species (from 9 mm in the smaller males to 15.5 mm in the largest females), with variable ground coloration mostly in females.

DESCRIPTION

Males

Body dorsally brown-grey, head brown with grey face. Lateral lobes of pronotum green. Hind femur with dorsal marginal area green, outer face dark brown with two transverse whitish coloured bands; internal face whitish with two transverse dark brown bands; ventral area of hind femur and hind tibiae purple or pinkish. Phallic complex ( Figs 1 I-M; 4C-E): valves of aedeagus very long, protruding beneath the pallium, highly surpassing the level of the epiproct, apex bent downwards; sheath of aedeagus covering ⅔ of the valves of aedeagus with numerous spines; arch of cingulum large. Epiphallus with lophi widely developed horizontally and reduced anchorae.

Measurements (in mm): body length to end of hind femur: 10.26 (9-11.5); hind femur length: 5.95 (5.5-6.5).

Females

Similar to males, but more robust and with the pronotum constricted at the middle and with the carinulae on tegument clearly indicated ( Fig. 1G ). Head with fastigium more prominent; eyes subtrigonal ( Figs 1F ; 4B ). Ovipositor valves strong and long, with serrate margins ( Fig. 1H ). Body colour highly variable: ground colour green, brown or dark purple almost black; with two longitudinal cream bands running along the lateral carinae of the pronotum, the meso and metanota and along abdominal tergites, in some specimens limited by dark brown bands on the head. Body ventrally purple. Hind femora with dorsal area homogeneously green or with two dark brown cross bands, internal face and ventral area red-orange or purple. Hind tibiae red-orange or purple.

Measurements (in mm): body length to end of hind femur: 13.67 (12-15.5); hind femur length: 7.99 (7-8.5).

Figures

FIG. 1. — Tiyantiyana sunipenis n. gen, n. sp.: A, male habitus, lateral view; B, C, male head and pronotum, lateral and dorsal views; D, E, male distal abdominal segments, dorsal and lateral views; F, G, female head and pronotum, lateral and dorsal views; H, female ovipositor valves;I, phallic complex,lateral view;J, L, endophallic plates,cingulum and aedeagal valves with sheath, dorsal and lateral views; K, distal portion of aedeagus and aedeagal valves, ventral view; M, epiphallus, dorsal view. Abbreviations: Ap, apodemes of cingulum; Ar, arch of aedeagus; Av, aedeagal valves; Ep, endophallic plates;L, lophi of epiphallus; Rm, rami; Sh, sheath of aedeagus, Zy, zygoma. Scale bars: 1 mm.

FIG. 4. — Tiyantiyana sunipenis n. gen., n. sp.: A, male habitus, lateral view; B, female habitus, lateral view; C, D, endophallic plates, cingulum and aedeagal valves with sheath, lateral and dorsal views; E, epiphallus, dorsal view. Scale bars: 5 mm.

FIG. 10. — Geographic distribution of species collected in this study: Huaylasacris maxicerci n. gen., n. sp. (□); Maeacris ayasqa n. sp. (■); M. chilikuti n. sp.(△); M. saytu n. sp.(▲); Orphulella chumpi n. sp.(☆); Pediella ancashensis Cigliano, Amédégnato,Pocco & Lange, 2010 (★); Trimerotropis andeana Rehn, 1939 (◇); Tiyantiyana sunipenis n. gen., n. sp. (◆).