Chaudhripalpus Mesa, Welbourn and Evans, 2009,

Beard, Jennifer J., Seeman, Owen D. & Bauchan, Gary R., 2014, Tenuipalpidae (Acari: Trombidiformes) from Casuarinaceae (Fagales), Zootaxa 3778 (1), pp. 1-157: 6-7

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Chaudhripalpus Mesa, Welbourn and Evans, 2009


Chaudhripalpus Mesa, Welbourn and Evans, 2009 

Type species. Crossipalpus creelae Smiley, Frost and Gerson, 1996  , by original designation.

Diagnosis. All life stages: dorsal opisthosoma with 9 pairs of palmate setae; c 2, d 2, e 2, and f 2 absent; setae h 2 similar in size and form to other dorsal setae; palps 4 -segmented, palp setal formula 0, 0, 0, 2 (1); immature stages with anterior margin of prodorsum smoothly rounded, without projections/notches; ventral plate absent; 3 pairs of pseudanal setae (ps 1–3) on well developed plates. Adult female: cuticle between gnathosoma and prodorsum produced into 1 pair of blunt, broadly triangular membranous lobes (with median notch formed between the lobes), anterior to and folded under anterior margin of prodorsum and setae v 2, often appear slightly retracted back into body; gnathosoma completely concealed by prodorsum; genital plate weakly developed, membranous; metapodal plates not developed; coxae I without 1 c; trochanters I –IV 1 - 1 - 1 -0 or 0- 0-1 -0 (v ′ present or absent on tr I –II, absent on tr III –IV; l' always present on tr III); femora I –IV 3 - 3 - 2 - 1; genua I –IV bare; tibiae 4 - 4 - 3 - 3; tarsi I –IV without tc′′.

Males unknown.

Species. Two species: Ch. creelae  , Ch. costacola  .

Hosts and distribution. Casuarinaceae  , Australia.

Remarks. Mesa et al. (2009) state the following characters for the genus Chaudhripalpus  : five-segmented palps with two simple setae, terminal podomere short, with one simple seta, one eupathidium and an elongate solenidion; ventral setae 4 a absent; aggenital (ag), genital (g) and pseudanal (ps) setae smooth. However on examining the type series, we found these characters to be incorrect. The correct characters are as follows: four-segmented palps with no simple setae, terminal podomere with one solenidion and one seta-like eupathidium; ventral setae 4 a present; aggenital, genital and pseudanal setae are all barbed (ps 3 only weakly barbed).

Chaudhripalpus  is close to the monotypic genus Tegopalpus  , differing only in having a four segmented palp (three segmented in Tegopalpus  ) and in having setae v" present on tibiae I –IV. This genus is tentatively retained as a separate genus, as the three segmented palp of Tegopalpus  is autapomorphic within the Tegopalpinae and other mites found on Casuarinaceae  .

Males remain unknown for Chaudhripalpus  , but like the closely related genus Tegopalpus  , we expect that the male and female solenidia would be of similar length and size.