Entomobrya salina Jordana & Greenslade 2020
- Dataset
- Biogeographical and ecological insights from Australasian faunas: the megadiverse collembolan genus, Entomobrya (Entomobryidae)
- Rank
- SPECIES
- Published in
- Jordana, Rafael, Greenslade, Penelope (2020): Biogeographical and ecological insights from Australasian faunas: the megadiverse collembolan genus, Entomobrya (Entomobryidae). Zootaxa 4770 (1): 1-104, DOI: 10.11646/zootaxa.4770.1.1
Classification
- kingdom
- Animalia
- phylum
- Arthropoda
- class
- Entognatha
- order
- Collembola
- family
- Entomobryidae
- genus
- Entomobrya
- species
- Entomobrya salina
description
(Figs 3 E, 5 L, 36 A – H)
description
Description. Size. Length up to 2.14 mm excluding antennae (holotype). Colour. (Fig. 3 E and 5 L) Whitish with purple – blue pigment on Antennae and legs. Anterior of head pigmented, two black eyes spots. Th II with lateral colour faded. Th III with lateral bands and a transverse band distally on tergite. Abd I without colour, Abd II and III totally pigmented, Abd IV and V with the half posterior half pigmented. Head. Antennal length 1090 μm, 2.7 times the length of the head (Holotype), Ant IV with the bilobed apical vesicle. Relative length of Ant I / II / III / IV = 1.0 / 1.6 / 2.3 / 2.9. Four labral papillae with conical projection not chaetallike (Fig. 36 H). Four prelabral ciliate chaetae and 5, 5 4 labral smooth chaetae. External process of labial papilla E surpassing the papilla tip. Posterior labial row with MREL 1 L 2 ciliated chaetae, R smaller than M. Eight eyes, G and H similar in size to E and F. Thorax and abdomen. Ratio of lengths Abd IV / III = 4 (Holotype). Trochanteral organ near 14 spiny chaetae. Unguis characteristic with 4 teeth on internal edge; first pair at 50 % distance from base of unguis, and 2 unpaired teeth, first pair at 78 % distance from the base; most distal one minute (difficult to see). Dorsal tooth basal. Unguiculus truncate, external edge smooth on all legs; internal edge with an apparent lamella (Fig. 36 F). Furcal length 900 μm (Holotype). Manubrial plate with 4 chaetae and 2 psp? Mucro with 2 teeth, subapical tooth smaller than apical one. Mucronal spine present. Distal smooth part of dens a little longer than the mucronal length (Fig. 36 G). Macrochaetotaxy. Simplified formula: 3,1,0,3,2 / 5,4 / 2,3 / 1,0,1 / 4 (5), 4 (3), 6,4 (5), 4. Head chaetotaxy (Fig. 36 A) of H 1 area with An 2, An 3 a 1 and An 3, H 2 area with A 5, S’ 0 Mc absent, H 4 with Mc S 1, S 3 and S 4 i, H 5 with Mc Ps 2 and Ps 5. Thoracic chaetotaxy (Fig. 36 B) with Area T 1 on Th II with 5 Mc (m 1, m 1 p, m 2, m 2 i and m 2 i 2). Area T 2 on Th II with 4 Mc present (a 5, m 4, m 4 p and m 5). Abdominal chaetotaxy (Fig. 36 C) with Area A 1 on Abd II with 2 Mc (a 2 and a 3) and area A 2 on with 2 Mc (m 3, m 3 ep and m 3 e). Abd III with 1 mac on areas A 3 and A 5, without Mc on area A 4, m 3 Mc as Fig. 36 D. Abd IV with 44 Mc (A 1, A 2 – A 6, B 1, B 3 – B 6, D 1, E 1, C 1 and C 2 a (Fig. 36 C) and some chaetae of Ae and Ai series as mes). B 5 Mc as figure 36 E. The Chaetotaxic distribution is rather asymmetrical. Sensillary chaetotaxy not seen.
discussion
Remarks. Only six species have 2,3 / 1,0,1 Mc on Th II and III: E. nivalis (Linnaeus, 1758), E. leonensis Jordana & Baquero, 2005, E. caputovisensis sp. nov., E. unostrigata Stach, 1930 and E. salina sp. nov. Entomobrya salina sp. nov. differs in the unguis structure, the chaetotaxy of Abd IV, Th II and colour pattern.
etymology
Etymology. The species name refers to the specialised habitat in which this species is found.
materials_examined
Holotype. Female, SA, Price Salt Fields, - 34.286111 ° S, 137.995 ° E, 5 m asl, under stones, 18. xii. 76, PG leg. [SAMA 22660,01]. Paratype. Juvenile on the same slide as holotype (SAMA 22660,02).