Eryngiopus techuelche Khaustov 2016, n. sp.
Creators: name: Khaustov, A. A.
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Prostigmata
Stigmaeidae
Eryngiopus
Eryngiopus techuelche

description: Eryngiopus techuelche n. sp.   
 (Figures 31-35)   
 Description   
 Female (Figures 31-35) — Length of idiosoma 365, width 185.   
 Idiosomal dorsum (Figures 31A, 35A, B) — Idiosoma fusiform, soft, mostly striated. Eyes present. Propodosomal plate divided into two separated longitudinally aligned parts bearing setae vi and ve (Figure 35B). All dorsal setae uniform, bluntended and weakly barbed. Setae c 2 situated dorsally. Suranal plate divided, with two pairs of setae (Figure 35A). A pair of platelets situated between setae c 1 and d 1; another pair of very small platelets situated anteriorly to setae e 1. Lengths of dorsal setae: vi 17, ve 26, sci 26, sce 31, c 1 27, c 2 30, d 1 22, d 2 24, e 1 16, e 2 16, f 1 23, h 1 29, h 2 33.   
 Idiosomal venter (Figure 31B) — Ventral setae smooth and pointed, except weakly barbed and blunt-ended ps 1-2. Two pairs of aggenital setae; ag 1 situated on soft cuticle; ag 2 on weakly defined platelet. Another small platelet situated posterolaterally to seta ag 2. One pair of genital setae. Cuticle posteriad to gnathosomal base with microtubercles. Setae 1 a, 3 a and 4 a very long. Coxal fields IV with one pair of setae. Lengths of ventral setae: 1 a 81, 1 b 20, 1 c 22, 2 b 27, 3 a 67, 3 b 25, 3 c 27, 4 a 81, 4 b 24, ag 1 22, ag 2 28, g 30, ps 1 19, ps 2 17, ps 3 23.   
 Gnathosoma (Figure 32) — Tibial claw large. Setae l’ of palpal tibia thin, seta-like. All palpal setae pointed and smooth. Number of setae on palpal segments: Tr 0, Fe 3 (d, l’, v"), Ge 1 (d), Ti 3 (d, l’, l"), Ta 8(1) (fused eupathidia ul’, ul", sul, eupathidion acm, ba, bp, lp, 1 solenidion ω). Setae v" of femur very short (Figure 35C). Palpal supracoxal setae (ep) small, thick, with distinctly rounded tip. Chelicerae dorsally smooth (Figure 35D). Rostrum of subcapitulum long. Subcapitular setae pointed; and smooth. Setae n very long. Basal part of subcapitulum without reticulation (Figure 35C). Lengths of subcapitular setae: m 26, n 70, or 1 14, or 2 15.   
 Legs (Figures 33, 34) — Empodial raylets distinctly capitate. Leg segments without reticulation. Leg I (Figure 33A). Coxae I posterodorsally with small, thick, with distinctly rounded tip leg supracoxal setae (el). Leg setation: Tr 1 (v’), Fe 4 (d, l’, l", bv"), Ge 4 (d, l’, l", k), Ti 5(1) (d, l’, l", v’, v", φp), Ta 13(1) (p’, p", tc’, tc", ft ’, ft", u’, u", a’, a", pl’, pl", vs, ω). Setae d of tibia, (p) and (tc) of tarsus are eupathidia. Seta k 4 needle-like. Solenidion ω short 8, finger-shaped; solenidion φp 12 uniformly thin. All leg setae smooth. Leg II (Figure 33B). Leg setation: Tr 1 (v’), Fe 4 (d, l’, l", bv"), Ge 1 (l’), Ti 5(1) (d, l’, l", v’, v", φp), Ta 9(1) (p’, tc’, tc", u’, u", a’, a", pl’, vs, ω). Solenidion ω 6 finger-shaped; solenidion φp 10 uniformly thin. All leg setae smooth. Setae d of tibia and tc" of tarsus long. Leg III (Figure 34A). Leg setation: Tr 1 (v’), Fe 2 (d, ev’), Ge 0, Ti 5(1) (d, l’, l", v’, v", φp), Ta 7(1) (tc’, tc", u’, u", a’, a", vs, ω). Solenidion ω 5 baculiform; solenidion φp 9 uniformly thin. Setae d of tibia and (tc) of tarsus very long. All leg setae smooth. Leg IV (Figure 34B). Leg setation: Tr 0, Fe 2 (d, ev’), Ge 0, Ti 5(1) (d, l’, l", v’, v", φp), Ta 7(1) (tc’, tc", u’, u", a’, a", vs, ω). Solenidion ω 4 baculiform; solenidion φp 7 uniformly thin. Setae d of tibia and (ts) of tarsus very long. All leg setae smooth.   
 Male and immatures unknown.   
 Type material — Female holotype, slide AT260115 /S2, Chile, the Region of Magallanes, Nothofagus forest, in Sphagnum sp., 53°41’08.8"S, 70°58’24.2"W, 26 January 2015, coll. A.V. Tolstikov.   
Etymology — The name of the new species is derived from the name of Tehuelche people, a group of Amerindian tribes indigenous to Patagonia and the southern pampas regions of Argentina and Chile.  
 Differential diagnosis — The new species is most similar to E. similis Wood, 1967, described from New Zealand (Fan and Zhang 2005), by divided propodosomal and suranal plates and similar leg setation. However, it differs from the latter by very short seta v" of palpfemur (vs. well-developed in E. similis), by much longer setae (tc) on tarsi III and IV, presence of small platelets anteriorly to setae e 1 (vs. absent in E. similis).
description: Published as part of Khaustov, A. A., 2016, New species and records of mites of the family Stigmaeidae (Acari: Prostigmata) collected from mosses in Southern Chile, pp. 639-679 in Acarologia 56 (4) on pages 673-679, DOI: 10.1051/acarologia/20164150, http://zenodo.org/record/5401604