Redescription of Pterygosoma patagonica (Acariformes: Pterygosomatidae) with new host and distribution data

Abstract

Pterygosoma patagonica Dittmar de la Cruz, Morando and Avila, 2004 (Acariformes: Pterygosomatidae) is redescribed from specimens collected from three iguanid species, Liolaemus petrophilus Donoso-Barros and Cei, 1971 (type host), Liolaemus austromendocinus Cei, 1974 and Liolaemus rhoti Koslowsky, 1898 (new host record) (Squamata: Liolaemidae) from Argentina, including the type locality. Pterygosoma patagonica is most similar to Pterygosoma ligare Fajfer and González Acuña, 2013, but differs in the absence of dorsal setae on femora II and IV, lateral seta on genua IV and the setae anterior to the pseudoanal area (vs. present in P. ligare), the smaller idiosoma (400–515 long and 500–615 wide) (vs. idiosoma 655–745 long and 1115–1135 wide), slightly serrated subcapitular setae n (vs. smooth setae), the anterior mid-dorsal setal cluster with 40–50 setae subequal in the length (vs. the setal cluster with about 86 setae that progressively elongate from the anterior to the posterior part of the cluster), 2 pairs of dorso-median setae dm (vs. absence of these setae), 3–6 pairs of ventro-median setae vm, 9–13 pairs of the postero-lateral setae and 4–6 pairs of the peripheral setae on the ventral side of the idiosoma (vs. 15 pairs of setae vm, 19 pairs of the postero-lateral setae and 13 pairs of the peripheral setae), 4 pairs of the pseudoanal setae ps (vs. 5 pairs of setae ps), legs I–IV subequal in the length (vs. the second pair of legs is shorter than the others).