Entomobrya promontorium Jordana & Greenslade 2020, sp. nov.
Creators: name: Jordana, Rafael
name: Greenslade, Penelope
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Entognatha
Collembola
Entomobryidae
Entomobrya
Entomobrya promontorium

description: Entomobrya promontorium sp. nov.
(Figs 3A, 32 A–F)
Holotype. Female (marked under slide), New Zealand, Rock and Pillar Range, - 45.3833°S, 170.1167°E, 1450m asl, pitfall, 12–15.v.1999, B. J. Sinclair leg. [SAMA 22656].
Paratypes. Three specimens: two females and subadult, same data as holotype.
Description. Size. Length 1.342 mm (n= 4).
Colour. Greenish from note on slide label.
Head. Eight eyes, G and H smaller than E and F. Antennal length 661 μm, 2.09 times the length of the head. Ant IV with bilobed apical vesicle; relative length of Ant segments: 1/2.3/2,5.6/2.9. Sensory organ Ant III as figure 32B. Four prelabral ciliated chaetae, 5,5,4, labral smooth chaetae. Labium with MREL 1 L 2 ciliated chaetae, R 1/2 than M in length. Labral papillae with a protrusion in each papilla (Fig. 32A). Labial papilla E with external process reaching the papilla tip.
Thorax and abdomen. Ratio of lengths Abd IV/III=3.75 (n=4). Tibiotarsus without differentiated chaetae, with exception presence of smooth terminal chaetae on legs 3, characteristic for the genus. Unguis with 4 teeth, paired two at 50% from base, first unpaired tooth at 75 % from the base, dorsal tooth basal. Unguiculus acuminated, narrow, external lamella of leg 3 smooth. Tenent hair clavate, longer than unguis. Trochanteral organ with around 22 chaetae. Manubrial plate with 4 chaetae and 2 pseudopores. Mucro bidentate, both teeth of similar size with mucronal basal spine; Mucronal length15 micrometers; smooth apical part of dens twice length of mucro.
Macrochaetotaxy. Simplified Mc formula: 3,1,0,3,2/4,4/2,3/1,0,1/0,3,4,2,2. Head chaetotaxy (Fig. 32C) Mac An 2, An 3a1, An 3 and A 5. M 2 and M 4 present as Mc. In sutural row present S 0, S 2, S 3, S 4p, S 4i, S 4, S 5i and S 5. Ps 2 and Ps 5 present. Thoracic chaetotaxy: Th II chaetotaxy (Fig. 32D) T1 area with Mac m 1, m 2, m 2i and m 2e, T2 area with Mc a 5, m 4, m 4p and m 5. Abdominal chaetotaxy (Fig. 32E): Abd II with a 2, a 3, m 3ep, m 3e and m 3ea, on Abd III a 1 and m 3 Mc present; Abd IV (Fig. 32F) with Mc A 2, A 4 –A 6, A e4, B 2, B 4 –B 6, C 2a and E 1. Sensillary formula usual of Entomobrya. The bothriotricha on Abd IV in position T 2 and T 4 (0110).
Remarks. Four specimens were available, three adults and one subadult, with unique chaetotaxy for Entomobrya. The chaetotaxy of Th II, Abd II and III is similar to E. leonensis Jordana & Baquero, 2005 and E. nivalis (Linnaeus, 1758) but differs in the labral papillae being conical in this species and multispinate in the other two. The pattern of Mc on Abd IV is also different (0,3,2,2,2) for E. leonensis and (0,3,0,2,2) for E. nivalis.
Salmon (1964) recorded 37 species of Entomobrya from New Zealand, with five exotics although two were Australian species. None of these species have ever been revised but none have the same colour pattern as E. promontorium sp. nov. On current evidence it appears that this species is a short-range montane endemic.
Etymology. Named for the prominent rock formation on which the species was found.
description: Published as part of Jordana, Rafael & Greenslade, Penelope, 2020, Biogeographical and ecological insights from Australasian faunas: the megadiverse collembolan genus, Entomobrya (Entomobryidae), pp. 1-104 in Zootaxa 4770 (1) on page 61, DOI: 10.11646/zootaxa.4770.1.1, http://zenodo.org/record/3797958