Tegnacus unicornutus Pye, 2012

Soika, Grażyna, Gol, Ali, Honarmand, Arash, Wozińska, Anna & Sadeghi, Hussein, 2017, New records of eriophyoid mites from Iran (Acari: Trombidiformes: Eriophyoidea) and a description of a new Brevulacus Manson species, Zootaxa 4216 (4), pp. 321-338 : 335-337

Tegnacus unicornutus Pye, 2012

( Figure 8 )

Type data: Carpinus betulus L. ( Betulaceae ), England

Relation to the host. Vagrant on the under surface of the leaves. Causing no apparent damage ( Pye 2012).

Geographic distribution. England (Pye) and Iran (here).

Distribution and host plants in Iran. 2 females and 3 males from Aliabad-e Katul, 36°54'N - 54°53'E, Golestan Province, 140 m above sea level on Carpinus betulus L., 0 1 October 2013, coll. A. Gol. mounted on 5 slides and retained in the collections of the DVOPP, INHORT, Skierniewice and 3 females and 2 males mounted on 5 slides have been deposited in the DPPFA, FUM, Iran.

Remarks. This is the first record of this species on C. betulus in Iran. The genus Tegnacus was described on the basis of specimens collected in England by Pye (2012). The characteristic features of this genus are the hornlike projection between the prodorsal shield lobe and the base of the palps, short first annulus and the absence of seta l″ on genu II ( Pye 2012). The specimens originating from the Iranian population are morphologically almost identical to the original description of this species by Pye (2012). They differed only slightly from the original description by the length of the body (150–155 in Iranian specimens, 170‒183 in British specimens).

Figures

FIGURE 8. Digital micrographs of Tegnacus unicornutus Pye, 2012: A — Dorsal view; B — Ventral view; C — Lateral view. Scale bar: 50 µm for A, B; 10 µm for C.