. Bonner zoologische Monographien. Zoology. BONNER ZOOLOGISCHE MONOGRAPHIEN Nr. 52/2004 Discussion of subgenera, species included, distribution and habitat R () pyrifomis Lundblad, 1937, reported from a creek in southern Brazil, is the type species of the ge- nus. While this species is strikingly different from all other genera of the Anisitsiellidae-Limnesiidae com- plex - due to the untypical palpus, the medially fased Cl, and the ridge in the dorsal shield leading to the protruding eyes - the second subgenus, R. [Eoruta- cariis), erected by Cook in 1980, does not show such particular ch
. Bonner zoologische Monographien. Zoology. BONNER ZOOLOGISCHE MONOGRAPHIEN Nr. 52/2004 Discussion of subgenera, species included, distribution and habitat R () pyrifomis Lundblad, 1937, reported from a creek in southern Brazil, is the type species of the ge- nus. While this species is strikingly different from all other genera of the Anisitsiellidae-Limnesiidae com- plex - due to the untypical palpus, the medially fased Cl, and the ridge in the dorsal shield leading to the protruding eyes - the second subgenus, R. [Eoruta- cariis), erected by Cook in 1980, does not show such particular characters. R. {E.) ferradasae Cook, 1980, from bottom de- posits in small streams in Tucaman Province and Salta Province (Argentinia), is the species for which the sub- genus Eorutacarus was erected. R (E.) angelieri OrgWidsLn & Gruia, 1983 is de- scribed from a hyporheic sample collected from a mountain torrent in the "Parque Nacional Rancho Grande" (Estado Aragua, Cuba). Orghidan & Gruia FIG. 84. Genus Raacarus: (a) R (E.) angeiieri, (b) R {E.) ferradasae, (c) R. {E.) sasomus, (d) R. () stygius [Fig. a from Orgidhan & Gruia (1983), Fig. b from Cook (1980), Fig. c from Cook (1986), Fig. d from Harvey (1990)]. (1983) suggest the subgenus Neorutacarus, because of small differences in the extent of sclerotization of the ventral shield. However secondary sclerotizations var}^ greatly in extent, even between closely related species or male and female of a single species. Yet only the female of R (£) angelieri is known and the species is placed here in the subgenus Eorutacarus. However a particular characteristic of the species is the chitinized strip connecting the glandularia that are found in the dorsal furrow. R. {E.) sasonus Cook, 1986 was discovered in a sample from a hole dug in a gravel bar in the Sca- mander River near upper Scamander, Tasmania (Aus- tralia). Species incertae sedis R. () stygius Harv^ey, 1990 was discovered in Aus- tralia (near
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