Cunaxa gordeevae, Sergeyenko, Alexey L., 2009

Sergeyenko, Alexey L., 2009, New mite species of the genus Cunaxa (Acari: Prostigmata: Cunaxidae) from the Crimea, Ukraine, Zootaxa 2161, pp. 1-19 : 2-4

publication ID	https://doi.org/ 10.5281/zenodo.188963
DOI	https://doi.org/10.5281/zenodo.6222512
persistent identifier	https://treatment.plazi.org/id/04298795-FFD5-5117-FF48-E64BEB90FDA9
treatment provided by	Plazi
scientific name	Cunaxa gordeevae
status	sp. nov.

Treatment

Cunaxa gordeevae sp. nov.

Female ( Figs. 1–9 View FIGURES 1 – 5 View FIGURES 6 – 9 & 54 View FIGURES 54 – 58 ).

Gnathosoma ( Figs. 1–3 View FIGURES 1 – 5 ). Surface of basifemur, telofemur, and genu of palps covered by denticles. Palpal chaetotaxy: 0—1—1—3—5. Dorsal seta on basifemur filiform, dorsal setae on telofemur and genu incrassate. Apophysis of telofemur cone-like with pointed apex, distinctly separated from distal part of segment. A small ventral spine-like process present near the spine-like setae of tibiotarsus ( Fig. 1 View FIGURES 1 – 5 ). Proximal segment of chelicerae distinctly papillate, second segment mainly smooth but proximally some denticles occur dorsolaterally. Dorsally the coxal region possesses an oval-shaped papillated area. ( Fig. 2 View FIGURES 1 – 5 ). The ventral surface of the hypognathum with numerous papillae, which distally to hg4, together with broken striae, form a region which runs forward to the bases of setae hg1 ( Fig. 3 View FIGURES 1 – 5 ).

Idiosomal dorsum ( Figs. 4 View FIGURES 1 – 5 , 54 View FIGURES 54 – 58 ). Propodosomal plate with two pairs of sensillae (vi, sce) and two pairs of simple setae (ve, sci). Propodosomal plate smooth except in areas near the bothridia and laterally to setae ve some papillae present. Length of setae sci shorter or equal (rarely) to half the distance between their bases. Six pairs of hysterosomal setae situated on small platelets. Setae f1 and h1 weakly setose, about 1.6–2 times longer than c1, d1, and e1 which smooth and subequal in length.. Dorsal cuticle with long and thin striae, which in the region between setae c1 and d1 widely spaced ( Fig. 54 View FIGURES 54 – 58 ). Striae anterior to c1, laterally to propodosomal plate and im as well as around pre-anal area with a few papillae.

Idiosomal venter ( Fig. 5 View FIGURES 1 – 5 ). Striae around genital opening thin, papillate. Idiosomal venter with one pair of propodogastral, a pair of anal setae, 4 pairs of hysterogastral and 4 pairs of genital (g1–4) setae. Genital valves with thin broken striae. Setae g4 situated more laterally to row of setae g1–3 and little longer.

Legs ( Figs. 6–9 View FIGURES 6 – 9 ). Leg chaetotaxy: coxae I–IV, 3 sts, 1 peg —1 sts —3 sts —2 sts; trochanters I–IV: 1—1—2—1 sts; basifemora I–IV, 3—3—3—1 sts; telofemora I–IV, 4—4—4—4 sts; genua I–IV, {1 asl, 1 sts}, 3 asl, 4 sts —2 asl, 5 sts —1 asl, 5 sts —1 asl, 5 sts; tibiae I–IV, {1 asl, 1 sts}, 1 bsl, 4 sts —1 bsl, 5 sts —1 bsl, 5 sts —1 T, 4 sts; tarsi I–IV, {1 bsl, 1 peo, 1 sts}, 3 bsl, 1 dtsl, 2 tsl, 23 sts —1 bsl, 1 dtsl, 1 tsl, 25 sts —1 tsl, 26 sts —21 sts. Femora I and II entire, with weak ventral transverse furrow. Femora III and IV completely divided into basi- and telofemur. One of the two proximal solenidia on genu I short, about twice the diameter of its alveolus ( Fig. 6 View FIGURES 6 – 9 ). Tarsi III and IV with distinct pretarsi. Leg surface with papillae, which are dorsally larger but more rare.

Measurements. Length of idiosoma 460 (390–470); width 338 (280–340). Length of hypognathum 193 (185–211); width 108 (100–120). Length of palps 240 (237–251). Chelicerae 175 (175–198). Legs: I 356 (356–399); II 338 (338–368); III 371 (370–424); IV 427 (424–474). Length of setae: hg1 17 (16–21); hg2 25 (25–28); hg3 44 (36–44); hg4 28 (24–29); ve 14 (12–14); sci 23 (21–24); c1 25 (23–25); c2 21 (20–21); d1 25 (24–26); e1 28 (24–29); f1 44 (41–46); h1 42 (39–45); g 1–3 14–15 (14–16); g4 18 (16–19). Distance between setae: hg 4–4 39 (33–39); sci–sci 48 (47–53).

Remarks. In some specimens the proximal solenidia of genu I as well as the solenidion and the dorsal simple tactile seta on tibia II are in a duplex association.

Male and immatures unknown.

Etymology. The new species is named after the well known Russian acarologist Elena V. Gordeeva ( Karadag Nature Reserve, Feodosia, Crimea, Ukraine)—specialist on oribatid mites and my first mentor in acarology.

Differential diagnosis. This new species closely resembles C. setirostris (Hermann, 1804) but it differs from the latter by the number of solenidia on genua I–II, 4–2 (vs. 3– 1 in С. setirostris ). In С. gordeevae the papillae on dorsal surface of the coxal region of the hypognathum are separated from the papillae of ventral surface. In the new species the length of setae sci are shorter or barely equal to half the distance between their bases (in С. setirostris setae sci always longer than half distance between their bases).

Type material. Female holotype, Ukraine, Crimea, “Cape Martyan” Nature Reserve, litter under Quercus pubescens , 12.VI.2001 (Coll. Sergeyenko, A.L.). Paratypes: 7 ΨΨ, Ukraine, Crimea, vicinity of settl. Massandra, mixed forest, in litter, 12.X.2001 (Coll. Deyneka, N.V.). 1 Ψ, Ukraine, Crimea, Angarskiy pass, forest of Fagus orientalis and Carpinus orientalis , in litter, 24.X.2001 (Coll. Sergeyenko, A.L.). 1 Ψ, Ukraine, Crimea, vicinity of Yalta, Yalta mountain pasture, Lapata mount., litter under Fagus orientalis 15.VII.2007 (Coll. Khaustov, A.A.). 7 ΨΨ, Ukraine, Crimea, vicinity of Gurzuf, forest of Fagus orientalis , in litter, 7.VII.2002 (Coll. Khaustov, A.A.). 3 ΨΨ, Ukraine, Crimea, vicinity of Yalta, northern hill of Mogabi mount., in moss on soil, 15.X.2001 (Coll. Khaustov, A.A.).

Location of material. Holotype and 15 ΨΨ in NBG; 3 ΨΨ in SIZK; 3 ΨΨ in ZMKU.