Tetratriophtydeus, Ueckermann & Grout, 2007

Ueckermann, Edward A. & Grout, Timothy G., 2007, Tydeoid mites (Acari: Tydeidae, Edbakerellidae, Iolinidae) occurring on Citrus in southern Africa, Journal of Natural History 41 (37 - 40), pp. 2351-2378 : 2356-2357

Genus Tetratriophtydeus gen. nov.

Type species. Triophtydeus myacanthus Ueckermann, 1988 (in Meyer and Ueckermann 1988).

Diagnosis

Adults. This genus is closely related to Pretriophtydeus Andre´, differing from the latter in the chaetotaxy of tibiae I–IV, namely 4-2-2-2 instead of 5-3-2-2, and in having five pairs of genital and aggenital setae instead of six pairs of genital and aggenital setae.

This genus can be defined as follows: dorsum of idiosoma with 14 pairs of setae (υi, υe, sci, sce, c 1–2, d, e, f 1–2, h 1–2 and ps 1–2) including a pair of trichobothria (sci); tarsus I with 12 setae and a solenidion; poroidotaxy: 4 (ia, im, ip, ih); genital organotaxy: 2-6-5-5 (eugenital (eu) ♀ - eu „ -genital (ge) ♀ -aggenital (ag) ♀ setae); solenidiotaxy: 2 (tarsi I and II); epimeral formula: 3-1-4-3 (ventral setae plus coxal setae); chaetotaxy of some leg segments: tarsi 12(ω)-6(ω)-5- 5, tibiae 4-2-2-2, genua 3-2-2-2, femora 5-4-3-2 +1 (telofemur two and basifemur one), and trochantera 1-1-1-0. Femur IV divided. Palp chaetotaxy (tarsus to trochanter) 5-2-2-0 .

Etymology

The prefix Tetra refers to the main distinguishing character of the genus, namely the four setae on tibia I.