Penthalodes

Jesionowska, Katarzyna, 2010, A morphological study of the genus Penthalodes (Acari, Prostigmata, Eupodoidea, Penthalodidae) with description of a new species, Zootaxa 2672, pp. 29-49 : 31

Key to species of Penthalodes

1 Epirostrum trilobed ....................................................................................................................................................... 2

- Epirostrum monolobed ................................................................................................................................................ 5

2 Middle part of epirostrum triangular ........................................................................................................................... 3

- Middle part of epirostrum pentagonal, sharply tipped. Lateral lobes distinctly formed, asymmetrically tongueshaped with tips oriented antiaxially. Ornament of epirostrum reticulate. Alaska ........................................................ ...................................................................................................................... P . alaskaensis ( Strandtmann, 1971) sp. n.

3 Lateral lobes of epirostrum weakly formed. Rhagidial organ I with two banana-shaped or baculiform solenidia in tandem, in confluent depressions ................................................................................................................................. 4

- Lateral lobes of epirostrum distinctly formed, tongue-shaped, oriented obliquely in relation to middle lobe. Rhagidial organ I with two lanceolate solenidia in tandem, each in separate depression. Slovakia and Turkey....................... .............................................................................................................................. P. o val is (Dugés) sensu Kaluz, 2000

4 Lateral lobes of epirostrum small, triangular, pointed. Ornament of epirostrum reticulate. Opisthosomal setae (excluding genital region) loosely feathered. Hawaii ........................ P. hawaiiensis ( Strandtman & Goff, 1978) sp. n.

- Lateral lobes of epirostrum large broadly rounded. Ornament of epirostrum irregular, punctate, consisting of large and tiny costulae. Opisthosomal setae (except for genital region) tridactylate. Poland.................... P. polonicus sp. n.

5 Epirostrum a broadly rounded lobe distally, its ornament sparsely punctate posteriorly, and anteriorly with fine hairs. USA, Oregon ........................................................................................................................ P. oregonensis Baker, 1946

- Epirostrum differently shaped ...................................................................................................................................... 6

6 Epirostrum triangular.................................................................................................................................................... 7

- Epirostrum right-angled trapezium shaped in proximal part with slightly pointed lateral cusps, and in middle part transforms into short tongue-shaped process. Ornament of epirostrum reticulate posteriorly and striate in tongueshaped part. Mexico...................................................................................................................... P. boneti Baker, 1946

7 Lateral edges of epirostrum plicate, with at least two folds each, ornamentation reticulate. Rhagidial organ II with three solenidia, each in separate depressions, two of which are parallel and positioned distally. Japan........................ ................................................................................................................................................. P. c a r i n a t u s Shiba, 1978

- Lateral edges of epirostrum straight, without lateral folds, ornamentation reticulate posteriorly and striate anteriorly. Rhagidial organ II with three solenidia, in line. USA, Texas ..................................................... P. turneri Baker, 1946