Rhyncholimnocharinae Lundblad, 1936

Li, Hai-Tao, Jin, Dao-Chao, Yi, Tian-Ci & Guo, Jian-Jun, 2022, Contributions to the knowledge of Eylaoidea (Acari: Hydrachnidiae) from China, European Journal of Taxonomy 787 (1), pp. 53-70 : 60-61

Subfamily Rhyncholimnocharinae Lundblad, 1936

Rhyncholimnocharinae Lundblad, 1936: 203 .

Rhyncholimnocharinae – Cook 1974: 41. — Viets 1987: 679.

Diagnosis (after Cook 1974, modified)

Character of the family Limnocharidae ; gnathosoma attached to a long tubular extension of integument; palp segments 3 (but terminal segment may be greatly reduced giving the appearance of a two-segmented palp), occasionally 2, 4 or 5; dorsum with or without paired sclerites ( Tuzovskij & Gerecke 2020).

Habitat

Running waters (sediment of organic detritus, dead wood and leaf litter of pools, or in mosses at stronger flow velocity).

Distribution

Nearctic, Neotropical, Australian and Oriental realm.

Remarks

There are a total of 24 species in this subfamily including the new species herein described ( Tuzovskij & Gerecke 2020). Most species have a three-segmented palp, while Rhyncholimnochares tapiarum Tuzovskij & Gerecke, 2020 presents a two-segmented palp and R. expansiseta Cook, 1980 shows the phenomenon of its dorsal and ventral edges of P-I merged with the second segment ( Tuzovskij & Gerecke 2020). The palp of Austrolimnochares womersleyi (Lundblad, 1952) has 4 or occasionally 3 segments ( Harvey 1990). The new genus Pentachares Li & Guo gen. nov. established herein presents a five-segmented palp without any fusion. So, we modified the previous diagnosis.