Omanaxonopsis arabica, Smit & Pesic, 2010

Smit, H. & Pesic, V., 2010, New Species Of Water Mites From Oman, With Some Zoogeographical Notes (Acari: Hydrachnidia), Acarologia 50 (2), pp. 151-195 : 186

Omanaxonopsis arabica n. sp.

( Figures 26 A-G, 27A-B, 28F)

Type series — Holotype: female, spring Al Khremh , crossing road to United Arab Emirates border, Oman, 15.xi.2008, 24°47.421 N 55°56.503 E.

Diagnosis — As for genus.

Description

Female — Dorsal and ventral shields anteriorly fused; dorsal shield L 364, W 270; eye pigment well developed; dorsal shield ( Fig. 26A ) with four pairs of glandularia; postocularia well distanced from anterior margin; excretory pore located at posterior end of dorsal shield; ventral shield ( Fig. 26B ) L 378, W 331; lateral margins of ventral shield with an irregular truncate projection on each side located considerably posterior to the insertions of the fourth leg; capitular bay L 91; one pair of glandularia lying between the genital field and insertions of the fourth legs; acetabula difficult to see in the rugose integument but 5-6 pairs appear to be present, width between most lateral pair of acetabula 104; gonopore relatively large, W 42; chelicera ( Fig. 26G ) total L 118, basal segment L 84, claw L 38, L ratio basal segment/claw 2.2; capitulum ( Fig. 26D ) ventral L 62; palp ( Fig. 26 E-F): total L 196, dL and %L (in parentheses): P-1, 29 (14.8); P-2, 46 (23.5); P-3, 26 (13.3); P-4, 72 (36.7); P-5, 23 (11.7); L P-2/P-4 ratio 0.64; distoventral portion of P-2 expanded. Legs: L of I-Leg ( Fig. 27A ): 32, 37, 32, 46, 63, 66; L of IV-Leg ( Fig. 27B ): 54, 68, 62, 69, 93, 80; IV-Leg-5 with two swimming hairs; the claws with dorsal and ventral clawlets.

Male — Unknown.

Etymology — Named for its occurrence on the Arabian peninsula.

Figures

FIGURE 26: Omanaxonopsis arabica n. sp., female: (A) – dorsal shield; (B) – idiosoma, ventral view; (C) – genital field; (D) – capitulum; (E-F) – palp; (G) – chelicera. Scale bars = 100 µm.

FIGURE 27: Omanaxonopsis arabica n. sp., female: (A) – I-Leg; (B) – IV-Leg. Scale bar = 100 µm.