Orogastrura parva ( Gisin, 1949 )

Skarżyński, Dariusz, 2011, A taxonomic study on some Alpine Hypogastrura Bourlet, 1839 (Collembola, Hypogastruridae), Zootaxa 2786, pp. 62-68 : 63

Orogastrura parva ( Gisin, 1949)

Fig. 1

Hypogastrura parva Gisin, 1949: 386

Hypogastrura parvula Haybach, 1972 syn. nov.

Material examined. Holotype, female, Hn3, Switzerland, Bernese Highlands, Schynige Platte, 2,000m a.s.l., grassland, vii-viii.1946, leg. H. Gisin; paratypes - 2 ex., same data as holotype ( MNHG). Other material: Switzerland: 3 ex., Hn22, same data as holotype ( MNHG); 8 ex., He42, Grisons (Graubünden), Unterengadin, Alp Mingér, dry grassland with Sesleria sp. and Helianthemum sp., 2,100m a.s.l., 14.vii.1942, leg. H. Gisin ( MNHG); 7 ex., He44, Grisons, Süsom Givé (Pass), 2,150m a.s.l., grassland, 15-16.vii.1942, leg. H. Gisin ( MNHG); Austria: 7 ex., Ja x 906, Styria, Dachsteingebirge, Scheichenspitze, c. 2,700m a.s.l., 8.ix.1947, tussocks of Silene sp. etc., leg. E. Butschek ( MNHG); 3 ex., Jb Pr1/4, Tyrol, Schwarzsee near Nauders, 1,800m a.s.l., 20.ix.1948, leg. Anderlan ( MNHG); 3 ex., Jb Pr1/5, Tyrol, Spiegelkogel, 3,100m a.s.l., 1.ix.1948, leg. Eder ( MNHG); 7 ex. ( H. parvula holotype and paratypes), G 607 (nr. 20), Hohe Tauern, Glockner group, tussock of Deschampsia caespitosa, Gamsgrube near Promenadenweg, 2,460m a.s.l, 7.vii.1967, leg. Franz ( NHMV); Poland (leg. D. Skarżyński, DBET): 3 ex., Carpathians, Tatra Mts, neighborhood of Zielony Staw Gąsienicowy, c. 1,700m a.s.l., 20.vi.2004; 10 ex., Tatra Mts, mosses on rocks near snow field in upper Gąsienicowa Valley, 1,900m a.s.l., 18.viii. 2004; 4 ex., Tatra Mts, Ciemniak, 2,000m a.s.l., mosses on rocks, 18.ix.2004; 3 ex., Sudetes, Karkonosze Mts, neighborhood of Mały Staw, c. 1,200m a.s.l., mosses on rocks, 28.v.2005. All specimens on slides.

Remarks. The examination of the H. parvula and O. parva types revealed their morphological identity and conspecificity (eye fields in the H. parvula holotype as well as in the paratypes are clearly visible and furnished with 6 + 6 ocelli in the arrangement as in Fig. 1 ). I therefore conclude that H. parvula is a junior synonym of O. parva . Some specimens of H. parvula mentioned by Haybach (1972) in the original description as other material fall within the H. exigua range of variability; consequently, I regard them as conspecific with this species (see below). O. parva and H. exigua are almost identical, but they differ in the number of ocelli (6 + 6 versus 8 + 8) and the shape of tibiotarsal tenent hairs (weakly clavate versus clearly clavate). Their ranges of distribution are also different. The former is known from the Alps, Apennines, Sudetes and Carpathians ( Thibaud et al. 2004), while the occurrence of the latter is restricted to the Alps.

Figures

FIGURES 1 – 8. O. parva: 1, postantennal organ and ocelli; H. exigua: 2, chaetotaxy of th. II; 3, chaetotaxy of abd. III – VI; 4, chaetotaxy of ventral tube; 5, chaetotaxy of ant. III – IV; 6, postantennal organ and ocelli; 7, claw III with empodial appendage; 8, furca. Abbreviations in text.