Achaemenothrombium talebii (Karimi Irvanlou & Kamali, 2001) Saboori & Wohltmann & Hakimitabar, 2010

Saboori, Alireza, Wohltmann, Andreas & Hakimitabar, Masoud, 2010, A new family of trombidioid mites (Acari: Prostigmata) from Iran, Zootaxa 2611 (1), pp. 16-30 : 25-27

Achaemenothrombium talebii (Karimi Irvanlou & Kamali, 2001) comb. nov.

( Figs. 7–19 )

Syn.: Keramotrombium talebii Karimi Irvanlou & Kamali, 2001

Diagnosis. Larva with the following features: Ge I with 3 normal setae, microseta on Ti I and Ge II without two tips, Ta I with 5 solenidia and 6 eupathidia, Ta II with 2 solenidia and Ti III with 8 normal setae.

Description. Larva. For morphometric data see Table 2. Habitus as in Figure 7 . Colour in life unknown. Specimen captured in the field parasitic on bases of hind wing of Acrida oxycephala (Pall.) ( Orthoptera : Acrididae ) by J.S. Karimi Irvanlou.

Gnathosoma ( Figs. 11 & 12 ). Cheliceral claw broken in specimen. No hypostomal setae detectable, oral setae (as) (9) spine-like on small projections. No supracoxal seta (elcp) visible. Pedipalp formula (ƒPρ): n-nnnN 2 -nnNNNζω. Palp trochanter not detectable. Palp femur and genu each with one spine-like seta (5–7) dorsally. Palp tibia with two spines (5–6) dorsally near base of odontus plus one elongate, smooth seta (57) ventrally. Odontus with two tips, divided 1/3 of the length. On palp tarsus three distinctly prolonged, smooth setae (22, 47, 57) plus two spine-like, nude setae (3–4), one eupathidium (ζ) and one solenidion (ω) of about same length (5–7).

Idiosoma ( Fig. 7 ). Scutum pentagonal oblong, rounded anteriorly, without lateral flaps, punctate, punctations are more distinct medially behind AM bases. AL and PL setae with minute barbs and AM and sensillae (S) smooth. Posterior to scutum an ovoid scutellum, setae c 1 barbed, arising half length of the sclerite. Posterior to scutellum a second, smaller scutellum, setae d 1 barbed, arising just anterior to half length of the sclerite. Two pairs of eyes at the level of posterior part of scutum, each pair situated on the oval sclerite (28 × 50) and slightly protruding above the idiosoma surface. Anterior lens (26) slightly larger in diameter than the posterior one (19). Rest of dorsum with smooth, folded in lines cuticle. Dorsal setae barbed, situated on plates, arranged in rows C 1-3, D 1-3, E 1-3, F 1-3 and H 1-2 (including setae on anterior and posterior scutellum).

Ventral side of idiosoma with one pair of Claparéde's organs laterally between coxae I and II. Coxa I with setae 1a (53) and 1b (45) barbed, a smooth supracoxala (elc I) (7) located dorsolaterally on coxa I. Coxa II with setae 2a (59) and 2b (31) barbed. Coxa III with seta 3b (50) barbed. Setae 3a (46) located outside coxa III and form a pair of intercoxal setae. Posteriorly following 15 barbed setae around anal opening. Anal pore without sclerite, 47 long.

Legs ( Fig. 13–19 ). Segmentation formula: 6-6-6, for leg chaetotaxy see Table 1. All normal setae on legs I–III setulose. Pretarsus of legs I–II with paired claws and claw-like empodium. Pretarsus of leg III with 1 claw plus empodium normal, the inner claw curved outside, shorter and slightly thicker.

Postlarval instars: unknown

Type material. Holotype [ARS-20100224-2] deposited at ‘ Jalal Afshar Zoological Museum’ , College of Agriculture , University of Tehran, Karaj, Iran.

Distribution. Iran, Varamin, 19 October 1998 (date mentioned by collector may be incorrect because senior author was not successful at collecting grasshoppers on 19 October in Varamin), J.S. Karimi Irvanlou.

Remarks. A. talebii was erroneously assigned to Keramotrombium Southcott, 1994 , by Karimi Iravanlou and Kamali (2001), based upon an incomplete description and figures with some characters misinterpreted. This is revised in the present investigation. For differentiation to A. cyrusi gen. et sp. nov., the only other species in the genus, see above.

Figures

FIGURES 7–10. Achaemenothrombium talebii (Karimi Irvanlou & Kamali, 2001) comb. nov. (larva). 7, idiosoma, dorsal view; 8, idiosoma, ventral view; 9, scutum; 10, scutellum I & II.

FIGURES 11–13. Achaemenothrombium talebii (Karimi Irvanlou & Kamali, 2001) comb. nov. (larva). 11, gnathosoma, dorsal view; 12, gnathosoma, ventral view; 13, coxa-genu of leg I–III.

FIGURES 14–19. Achaemenothrombium talebii (Karimi Irvanlou & Kamali, 2001) comb. nov. (larva). 14, Ti I; 15, Ti II; 16, Ti III; 17, Ta I; 18, Ta II; 19, Ta III.