Bakerdania undulata Khaustov

Khaustov, Alexandr A., 2010, Three new species of mites of the genus Bakerdania Sasa, 1961 (Acari: Heterostigmata: Neopygmephoridae) from “ Cape Martyan ” Nature Reserve, Crimea, Zootaxa 2600, pp. 53-60 : 56-59

Bakerdania undulata Khaustov sp. nov.

Figs. 6–10 .

Description. FEMALE: Idiosomal length 297, maximum width 150. Gnathosoma ( Figs. 6–7 ) dorsally with 2 pairs of simple setae, ch 1 distinctly longer than ch 2. Dorsal medial apodeme well developed. Setae dFe needlelike. Idiosomal dorsum ( Fig. 6 ). All tergites smooth. Setae v 2 smooth, other dorsal setae barbed. Tips of setae sc 2, c 1, d, and e, blunt. Other dorsal setae pointed. Length of dorsal setae: v 2 10, sc 2 47, c 1 58, c 2 73, d 43, e 27, f 103, h 1 104, h 2 74. Distances between dorsal setae: v 2- v 2 38, sc 2- sc 2 36, c 1– c 1 47, c 1– c 2 30, d–d 50, e–f 9, f–f 85, h 1– h 1 58, h 1– h 2 8. Idiosomal venter ( Fig. 7 ). Apodemes 1, 2, and sejugal apodeme well developed and joined with presternal apodeme. Secondary transverse apodeme absent. All ventral plates smooth. Setae 1 a and 1 b strongly barbed, setae 2 a with several thin barbs, other ventral setae smooth. Posterior margin of posterior sternal plate tripartite. Setae ps 3 situated close to base of ps 2. Apodemes 3 weakly developed, diffuse. Apodemes 4 long, reaching level of setae 3 c. Apodemes 5 absent. Posterior margin of aggenital plate concave. Length of ventral setae: 1 a 21, 1 b 22, 2 a 23, 2 b 19, 3 a 23, 3 b 21, 3 c 20, 4 a 13, 4 b 24, 4 c 18, ps 1 18, ps 2 12, ps 3 11. Legs ( Figs. 8–10 ). Setation of legs as in B. latissimosetosa sp. n. Leg I ( Fig. 8 ). Tibiotarsus with simple small claw situated on long pretarsus. Solenidia ω1 15> ω2 11> φ1 9> φ2 7. Solenidion ω1 finger-shaped. Solenidion φ1 baculiform. Solenidia ω2 and φ2 uniformly thin. Seta dFeI hook-like, setae l’GeI blunt. Leg II ( Fig. 9 ). Tarsus with simple sickle-like claws. Solenidion ω (13) finger-shaped. Solenidion φ small, difficult to see, setae d’FeII blunt. Leg III. Solenidion φ small, difficult to see, setae d’FeIII blunt. Leg IV ( Fig. 10 ). Tarsus short. Pretarsus short, with large simple claws and thin, tongue-like empodium distally. Setae v”TiIV, pl”TaIV blunt. Length of setae v”TiIV 19, pl”TaIV 17.

MALE and LARVA unknown.

Type material. Female holotype and 5 female paratypes, UKRAINE, Crimea, “Cape Martyan” Nature Reserve, in soil under grass, 10 March 2010, coll. A. A. Khaustov.

Etymology. The species name refers to “undulate” posterior margin of posterior sternal plate of the new species.

Differential diagnosis. The new species is most similar to B. palustris Khaustov, 2008 . Both species have long and thin setae f and h 1, unmodified setae e, short and smooth setae on posterior sternal plate, tripartite posterior margin of posterior sternal plate. The new species differs by subequal setae f and h 1 (in B. palustris setae f distinctly longer than h 1), by blunt setae c 1 (in B. palustris setae c 1 pointed).

Figures

FIGURES 6 – 7. Bakerdania undulata sp. nov., female: 6 — dorsum, 7 — venter. Scale-bar— 50 µm.

FIGURES 8 – 10. Bakerdania undulata sp. nov., female: 8 – 10 — legs I, II, and IV, respectively. Scale-bar— 20 µm.