Himalanura gansuensis, Zhou & Ma, 2022

Zhou, Rong & Ma, Yitong, 2022, Three new species of Entomobryinae (Collembola, Entomobryidae) from Gansu China, Zootaxa 5155 (3), pp. 371-392 : 377-380

Himalanura gansuensis sp. nov.

Figs 35−59 , Table 2

Types. Holotype: adult female on slide, China, Gansu Province, Lanzhou City, Yuzhong County, Xinglongshan Mountain , 35°48′11″N, 104°03′56″E, altitude 1,900 m, 12, June, 2019, collection number: 1205, by Yitong Ma with entomological aspirator . Paratypes: Seven adult females on slides, same data as holotype; One adult female on slide, China, Gansu Province, Tianshui City , Qinzhou District , Nanguo Temple , Dengbaoshan Memorial Hall , 34°34′01″N, 105°44′36″E, altitude 1,288 m, 13, June, 2019, collection number: 1210, by Yitong Ma with entomological aspirator. All deposited in NTU .

Description. Body length up to 1.42 mm. Ground colour pale yellow in ethanol. Distal part of Ant. I−II, Ant. III−IV blackish violet. Eye patches dark blue. Anterior and lateral parts of dorsal head with blue pigment. Blue pigment also present on each tergite and coxa ( Figs 35−36 ).

Body chaetae long and leaf-like ( Fig. 37 ).

Antenna 0.41−0.45 times body length; antennal segment ratio as I: II: III: IV = 1: 1.70−2.22: 1.60−2.00: 2.07−2.85. Apical bulb of Ant. IV bilobed ( Fig. 41 ). Distal part of Ant. III with three rods ( Fig. 42 ). Distal part of Ant. II with two rods ( Fig. 43 ). Eyes 8+8, G and H smaller than others, interocular chaetae as p, s, t mes ( Figs 38 , 44 ). Dorsal cephalic chaetotaxy with four antennal (An), four median (M) and eight sutural (S) mac ( Fig. 44 ). Prelabral and labral chaetae as 4/5, 5, 4, prelabral chaetae ciliate, other smooth, four labral papillae with one minute denticle each ( Fig. 45 ). Lateral process (l.p.) of labial papilla E differentiated, thicker than normal chaeta with tip reaching apex of papilla E ( Fig. 46 ). Labial triangular chaetae as MREL1L2, all ciliate and R 0.50−0.55 length of M ( Fig. 47 ). Subapical chaeta of maxillary outer lobe thin, subequal to apical one; three smooth hairs on sublobal plate ( Fig. 48 ).

Th. II with four (m1, m2, m2i, m2i2) mac on T1 area, five (a5, m4, m4i, m4p, m5) mac on T2 area, 24−30 posterior mac, one ms and two se on each side. Th. III with 32−36 mac and two se ( Fig. 49 ). Trochanteral organ with 11−13 smooth spiny chaetae ( Fig. 50 ). Unguis with four inner teeth, one pair located 0.57−0.59 from base of inner edge of unguis, distal unpaired two respectively at 0.71−0.76 and 0.83−0.91 distance from base. Unguiculus acuminate and outer edge serrate. Tenent hair thick with its tip clavate, longer than inner side of unguis ( Figs 39 , 51 ).

Abd. IV 2.50−4.28 times Abd. III in dorsal axial length. Abd. I with nine (a2, a3, a5, m2−4, m2i, m4i, m4p), ms antero-external to se. Abd. II with two (a2, a3) mac on A1 arae, four (m3, m3e, m3ea, m3ep) mac on A2 area, one (m5) lateral mac and two se. Abd. III with two (a2, a3) mac on A4 area, one (m3) mac on A5 area and three (am6, pm6, p6) lateral mac, one ms and two se ( Fig. 52 ). Abd. IV with seven central mac, 10 lateral mac ( Fig. 53 ). Abd. V with three se ( Fig. 54 ). Anterior face of ventral tube with 11−14 ciliate chaetae, line connecting proximal (Pr) and external-distal (Ed) mac oblique to median furrow ( Fig. 55 ); posterior face not clearly seen; lateral flap with 2−3 smooth chaetae and 7−8 ciliate chaetae ( Fig. 56 ). Manubrial plate dorsally with 6−7 ciliate chaetae and three pseudopores ( Fig. 57 ); ventrally with 10−11 ciliate chaetae on each side ( Fig. 58 ). Uncrenulated dens 2.43−3.21 times as mucro in length. Mucro bidentate, two teeth subequal and tip of basal spine reaching subapical tooth ( Figs 40 , 59 ).

Ecology. Found in rotten leaf, mainly composed of Pinus tabuliformis , Quercus liaotungensis and Cotoneaster zabelii .

Etymology. Named after its locality: Gansu Province.

Remarks. The new species is the second Himalanura species reported from China and can be distinguished from the first Chinese species of the genus, H. shanxiensis Zhou & Ma, 2020 in colour pattern, body macrochaetotaxy and other characters. It is similar to these species in macrochaetotaxy of Abd. III: H. baijali Baquero, Mandal & Jordana, 2014 , H. bulunkuli Tshelnokov, 1977 , H. gelmani Tshelnokov, 1987 , H. himachalensis Baquero & Jordana, 2015 (in: Baquero et al, 2015), H. martynovae Tshelnokov, 1977 and H. tundricola Tshelnokov, 1987 , but can be separated from them by apical bulb on antenna, macrochaetotaxy of dorsal head, Th. II−III, Abd I−II and IV ( Table 2 ).

Figures

FIGURE 52. Himalanura gansuensis sp. nov. 52. chaetotaxy of Abd. I−III. Scale bar: 20μm.

FIGURES 35−36. Himalanura gansuensis sp. nov. 35−36, habitus. Scale bars: 35−36= 500μm.

FIGURES 37−40. Himalanura gansuensis sp. nov. 37, leaf-like chaetae on body; 38, eyes; 39, middle claw; 40, mucrones. Scale bars: 37−40 = 10μm.

FIGURES 41−48. Himalanura gansuensis sp. nov. 41, apex of Ant. IV; 42, distal part of Ant. III; 43, distal part of Ant. II; 44, dorsal chaetotaxy of head; 45, labrum; 46, lateral process of labial palp; 47, labium; 48, maxillary outer lobe. Scale bars: 41−48 = 20μm.

FIGURES 49−51. Himalanura gansuensis sp. nov. 49, chaetotaxy of Th. II−III; 50, trochanteral organ; 51, hind foot complex. Scale bars: 49−51 = 20μm.

FIGURES 53−59. Himalanura gansuensis sp. nov. 53, chaetotaxy of Abd. IV; 54, chaetotaxy of Abd. V; 55, anterior face of ventral tube; 56, lateral flap of ventral tube; 57, manubrial plaque; 58, ventro-apical part of manubrium; 59, mucro. Scale bars: 53−59 = 20μm.