Stigmaeus pseudoparmatus, Doğan & Doğan & Erman, 2017

Doğan, Sibel, Doğan, Salih & Erman, Orhan, 2017, Description of five new species of the genus Stigmaeus Koch (Acari: Raphignathoidea: Stigmaeidae) from Turkey, Zootaxa 4276 (4), pp. 451-478 : 473-476

Stigmaeus pseudoparmatus sp. nov.

Female (n = 4) ( Figs. 26–28 ). Length of body 390 (349–372), width 175 (155–165). Gnathosoma 58 (55–59). Leg I 147 (138–145), leg II 115 (107–114), leg III 121 (115–123), leg IV 132 (126–132).

Dorsum of idiosoma. Integument striated. Prodorsum with a propodosomal shield. Shield-like areas present on posterior propodosoma, and central and lateral hysterosoma. Anterior marginal areas of prodorsum with tubercles. Borders of propodosomal shield not clear and shield with punctations and vague reticulations. Apodemal marking on striated integument. Eyes and pob absent. Setae vi and ve located on propodosomal shield. Setae sci, sce, c 1, c 2, d 1, d 2, e 2 on striated integument. e 1 on divided median zonal shields. f 1 on divided intercalary shield. Suranal shield divided and bearing three pairs of setae (h 1-3). Humeral shields absent. Dorsum with 14 pairs of smooth setae. Setae ve, c 2 and h 2 much longer than others, which are about equal in length. Lengths of dorsal idiosomal setae: vi 10 (11– 12), ve 32 (27–35), sci 10 (9–10), sce 12 (13–14), c 1 12 (12–12), c 2 37 (32–40), d 1 8 (8–9), d 2 8 (8–9), e 1 8 (9–10), e 2 9 (8–10), f 1 15 (15–16), h 1 16 (17–19), h 2 26 (24–28), h 3 12 (13–14). Distances between dorsal idiosomal setae: vi - vi 24 (19–26), ve -ve 41 (35–38), vi -ve 12 (14–15), sci -sci 55 (49–55), ve -sci 40 (40–47), sce -sce 126 (121–128), sci -sce 31 (28–35), c 1- c 1 58 (52–61), c 2- c 2 167 (148–151), c 1- c 2 60 (48–64), d 2- d 2 127 (120–121), c 1- d 1 75 (68–72), c 1- d 2 52 (47–51), d 1- d 1 41 (36–43), d 2- d 1 50 (49–50), e 2- e 2 110 (103–110), d 2- e 2 74 (69–72), d 1- e 1 47 (47–51), d 1- e 2 55 (53–58), e 1- e 1 34 (29–37), e 2- e 1 33 (37–38), f 1- f 1 47 (47–49), e 1- f 1 26 (23–28), e 2- f 1 41 (41–43), f 1- h 1 37 (34–38), f 1- h 2 39 (39–41), f 1- h 3 32 (35–38), h 1- h 1 23 (21–31), h 2- h 2 59 (52–56), h 1- h 2 15 (11–16), h 3- h 3 78 (72–75).

Venter of idiosoma. Coxisternal shields smooth, divided and bearing intercoxal setae; lengths and distances of setae: 1a 17 (15–16), 3a 23 (22–23), 4a 18 (17–18), 1a -1a 28 (25–30), 3a -3a 39 (43–47), 4a -4a 35 (35–50). Four pairs of aggenital setae (ag 1-4) present, ag 1 located on integument, others on aggenital shields. Genital shields with two pairs of setae (g 1, 2), anal shields bearing three pairs of pseudanal setae (ps 1-3). Lengths of setae: ag 1 11 (13–16), ag 2 12 (12–15), ag 3 12 (13–16), ag 4 12 (14–15), g 1 13 (13–17), g 2 14 (13–18), ps 1 17 (17–19), ps 2 17 (18–19), ps 3 11 (10–14).

Gnathosoma . Chelicerae 76 (75–83), palp 70 (66–69). Subcapitulum with two pairs of adoral setae (or 1,2) and two pairs of subcapitular setae (m, n). Setae n much longer than m. Lengths and distances of subcapitular setae: m 12 (12–14), n 55 (51–58), m -m 17 (22–23), n -n 31 (32–33), m -n 9 (8–10).

Legs. Counts of setae and solenidia on legs I–IV: coxae 2–2–2–2, trochanters 1–1–2–1, femora 4–4–3–2, genua 5(+1κ)–2–0–1, tibiae 5(+1φρ)–5(+1φρ)–5(+1φρ)–5(+1φρ), tarsi 13(+1ω)–9(+1ω)–7(+1ω)–7(+1ω).

Male and immature stages. Unknown.

Etymology. The specific name pseudoparmatus is a combination of Latin words pseudo, meaning false and parmatus, meaning shield, referring to the shield-like areas on the dorsum of the body.

Type materials. Holotype female from log of Alnus glutinosa and moss, 40° 39' 49''N, 39° 1' 55''E, 1713 m.a.s.l., 5 October 2013, Örümcek Forests , TURKEY . Paratypes: 1 female from litter under Juniperus sabina , same data ; 3 females from litter under Astragalus membranaceus , 40° 22' 02''N, 39° 49' 32''E, 1926 m.a.s.l., 25 September 2014, Harşit Valley , TURKEY .

Remarks. Stigmaeus pseudoparmatus sp. nov. is close to Stigmaeus arboricola Wood, 1981 , S. elongatus Berlese, 1886 , S. pseudoluteus Liang & Hu, 1987 , S. caeculus Barilo, 1989 , S. candidus Fan & Li, 1993 , S. tokatensis Dönel, Doğan, Sevsay & Bal, 2012 , S. nasrinae Nazari, Khanjani & Kamali, 2012 , S. kermaniensis Changizi & Bagheri, 2012 , S. saboorii Bagheri & Paktinat-Saeej, 2013 and S. berwariensis Uluçay, 2015 ; however, it can be distinguished from all of them by the following combination of features: propodosomal shield present, apodemal marking present, setae sce, c 2, d 2, e 2 on the striated integument, setae e 1 and f 1 on the shields, suranal shield divided, setae h 3 present, humeral shields absent, two pairs of genital and four pairs of aggenital setae present, ag 1 separated from other aggenital setae and different femoral and genual setal formula. The similar and different characters between Stigmaeus pseudoparmatus sp. nov. and related species are given in Table 1.

This study is a part of the first author’s PhD thesis, and was supported by the Scientific and Technological Research Council of Turkey (TÜBİTAK), research project number 113Z094. We thank Dr. Owen Seeman (Queensland Museum, South Brisbane, Australia) and anonymous referees for review and criticism of the manuscript.

Figures

FIGURE 26. Stigmaeus pseudoparmatus sp. nov. (Female) A. Dorsal view of idiosoma, B. Ventral view of idiosoma.

FIGURE 27. Stigmaeus pseudoparmatus sp. nov. (Female) A. Leg I, B. Leg II, C. Leg III, D. Leg IV.