Stigmaeus bifurcus,

Bingül, Meryem, Doğan, Salih & Dilkaraoğlu, Sibel, 2017, Contributions to the knowledge of the mite genus Stigmaeus Koch, 1836 (Acari: Stigmaeidae) of Turkey, European Journal of Taxonomy 307, pp. 1-16: 4-8

publication ID

https://doi.org/10.5852/ejt.2017.307

publication LSID

lsid:zoobank.org:pub:3645CA2E-F2CE-41FB-91EA-48999065936B

DOI

http://doi.org/10.5281/zenodo.3846655

persistent identifier

http://treatment.plazi.org/id/03CD87FF-FFC0-FF95-FD88-31548A2BAF15

treatment provided by

Carolina

scientific name

Stigmaeus bifurcus
status

sp. nov.

Stigmaeus bifurcus  sp. nov.

urn:lsid:zoobank.org:act:2EB6B605-F3AA-4142–8692-BD150A8A85D0

Figs 1–2View FigView Fig; Table 1

Etymology

The name of this new species, bifurcus  , refers to the shape of the eupathidion on the palptarsus.

Type material

Holotype

TURKEY: ♀, from soil under Ulmus  sp., Erzincan, alt. 1275 m, 39º39'39.8" N, 39º29'28.5" E, 25 Oct. 2015.

GoogleMaps 

Paratypes

TURKEY: 8 ♀♀, same data as holotype; 1 ♀, from soil under Rosa canina, same locality as holotype, 15 Mar. 2015.

Description

Female

IDIOSOMA. Elongated. Length of body (including gnathosoma): 396 (350–384). Width of body: 163 (129–157).

GNATHOSOMA ( Fig. 2BView Fig). Gnathosoma punctate and 68 (65–70) long, chelicerae separate and punctate, 78

(74–81) long. Palp punctate and 91 (74–89) long. Counts of setae and solenidia from palptrochanter to

palptarsus: 0, 3, 1, 2 + 1 claw + 1 seta-like accessory claw, 4 + 1 solenidion + 1 subterminal seta-like

eupathidion + 1 bifurcate eupathidion. Palptibial claw slightly longer than palptarsus. Palp supracoxal

setae (elcp) pudgy. Subcapitulum with two pairs of adoral setae (or 1,2) and two pairs of subcapitular setae (m, n). Dimensions and distance between subcapitular setae, m 14 (12–14), n 26 (22–25), m –m 21

(19–22), n–n 24 (23–26), m–n 12 (10–12).

DORSUM ( Figs 1AView Fig, C–D, 2A). Integument striate except punctate peritremal region, propodosomal shield with reticulations, its posterior margin concave and with tubercles. Propodosomal shield bearing three pairs of setae (vi, ve, sci) and apodemal marking, eyes and post-ocular bodies absent. Setae sce on minute platelets. Central shield vaguely reticulate but other shields not ornamented. Central shield bearing two pairs setae (c 1, d 1). In one paratype specimen left member of setae c 1 about twice as long as right member ( Fig. 1CView Fig). Setae d 2 located on marginal shield. Setae e 1 on divided median zonal shields. Setae e 2 located on minute platelets. Setae f 1 on divided intercalary shield. One pair of extra, minute and non-setose shields lateral to intercalary shields. Suranal shield divided and with three pairs of setae (h 1–3) but right member of setae h 3 absent in one paratype ( Fig. 1DView Fig). Setae vi, sci, d 1 and all suranal setae slightly serrated but others smooth ( Fig. 2AView Fig). Lengths and distances of dorsal idiosomal setae as follows: vi 16 (14–17), ve 42 (38–47), sci 20 (17–20), sce 41 (40–44), c 1 16 (15–17), c 2 46 (45–49), d 1 16 (16–18), d 2 34 (29–35), e 1 8 (17–20), e 2 18 (17–19), f 1 31 (34–38), h 1 21 (21–26), h 2 24 (21–26), h 3 13 (13–15), vi–vi 23 (24–29), ve–ve 33 (31–35), vi –ve 20 (19–22), sci –sci 46 (43–48), ve –sci 36 (33–35), sce –sce 99 (86–104), sci –sce 27 (23–29), c 1 –c 1 31 (26–31), c 2 –c 2 145 (124–145), c 1 –c 2 63 (46–66), d 2 –d 2 100 (89–102), c 1 –d 1 43 (40–46), c 1 –d 2 41 (35–41), d 1 –d 1 28 (27–31), d 2 –d 1 43 (39–43), e 2 –e 2 96 (83–97), d 2 –e 2 62 (51–61), d 1 – e 1 47 (40–49), d 1 – e 2 51 (44–49), e 1 – e 1 32 (29–37), e 2 – e 1 34 (27–37), f 1 –f 1 46 (43–51), e 1 –f 1 26 (24–26), e 2 –f 1 42 (36–43), f 1 –h 1 40 (35–46), f 1 –h 2 40 (30–43), f 1 –h 3 41 (27–36), h 1 –h 1 23 (22–26), h 2 –h 2 52 (48–54), h 3 –h 3 70 (57–66), h 1 –h 2 16 (12–14), h 2 –h 3 9 (6–9).

VENTER ( Fig. 1BView Fig). Almost striate. Back of coxae I–II and III–IV striate with tubercles. Humeral shields without reticulations and bearing setae c 2. Coxisternal shields divided, smooth and bearing three pairs of setae (1a, 3a, 4a). Lengths and distances of these setae: 1a 14 (12–13), 3a 14 (12–14), 4a 14 (11–14), 1a –1a 17 (17–21), 3a –3a 23 (20–29), 4a –4a 23 (16–26). Genital and anal shields contiguous, two pairs of smooth genital (g 1,2) and three pairs of slightly serrate pseudanal setae (ps 1–3). ps 3 shorter than other pseudanal setae. Four pairs of aggenital setae (ag 1–4) on long and divided aggenital shields. Lengths of these setae as follows: ag 1 10 (8–10), ag 2 10 (8–10), ag 3 10 (8–10), ag 4 11 (9–11), g 1 7 (6–9), g 2 12 (10–13), ps 1 27 (23–27), ps 2 25 (22–25), ps 3 13 (12–14).

LEGS ( Figs 2View Fig C–F). Coxae I–IV with punctation. Length: leg I 138 (136–140), leg II 106 (100–107), leg III 114 (108–115), leg IV 128 (121–129). 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)-3-0-1; tibiae 5(+1φ+1φρ)-5(+1φρ)-5(+1φρ)- 5(+1φρ); tarsi 13(+1ω)-8(+1ω)-7(+1ω)-7(+1ω). All tarsi with solenidia. Lengths of solenidia: Iω 11 (8–12), IIω 8 (7–9), IIIω 6 (3–5), IVω 6 (3–5).

Male and immature stages

Unknown.

Remarks

This new species resembles Stigmaeus kermanshahiensis Khanjani et al., 2012  and S. caria Khanjani et al., 2012  in that the eyes and post-ocular bodies are absent, suranal shield divided, one pair of extra, minute and non-setose shields lateral to the intercalary shields, and the palp tarsus bears a bifurcate eupathidium. However, it can be separated from S. kermanshahiensis  by the following characters: one seta on genu IV (vs two setae in S. kermanshahiensis  ), palptibia with two setae (vs three setae in S. kermanshahiensis  ), and apodemal marking present (absent in S. kermanshahiensis  ). Stigmaeus bifurcus  sp. nov. can also be distinguished from S. caria  by the following characters: three setae on genu II (vs two setae in S. caria  ), palptibia with two setae (vs three setae in S. caria  ), sce on minute platelets (on striate integument in S. caria  ), and apodemal marking present (absent in S. caria  ). The new species is also similar to S. hashtrudiensis Bagheri & Maleki, 2014  ; however, it differs from the latter in its apodemal marking and different numbers of setae on genua II–IV (genua 5(+1κ)-3- 0-1 in the new species vs 5(+1κ)-4- 1-2 in S. hashtrudiensis  ). See Table 1 for a comparitive presentation of characters among different Stigmaeus  species.