Eine merkwürdige, neue, in Tiefsee-Echiniden schmarotzende Halacaridengattung und -art [Acari]

Deep-sea halacarids (Acari) and description of a new species

“…The only known species of Enterohalacarinae, Enterohalacarus minutipalpis, is a parasite found in and on the sea urchin Plesiodema indicum, collected at about 430 m (Viets, 1938). Thus the distribution of Enterohalacarus will likely be influenced more by the distribution of the sea urchin population than by water depth.…”

Aquatic Mites from Genes to Communities

“…Fecundity offree-living species seems to be low, mostly less than 20 eggs per female lifetime. In contrast, the parasitic species Enterohalacarus minutipalpus Viets 1938 has an unusual large number of eggs ('eine auffallend groBe Anzahl von kleinen Eiern') (Viets 1938); in a slide re-examined there are more than 200 eggs per female (Bartsch, pers. observ.).…”

“…Eight of the genera (Arenihalacarus, Corallihalacarus, Enterohalacarus, Phacacarus, Spongihalacarus, Thalassophthirius, Werthelloides, Xenohalacarus) are known only from their type locality, where they were present with one to about two dozen individuals (Abe 1991;Bartsch 1986bBartsch , 1988bBartsch , 1992aOtto 1999Otto , 2000aViets 1938). The distribution of these eight genera is uncertain, they generally are excluded from further consideration.…”

“…None of the halacarid genera is restricted to algal turf, fronds or hapteres. The three genera Enterohalacarus, Parhalixodes and Spongihalacarus are thought to be obligate associates of echinoids, nemerteans and sponges, respectively (Viets 1938;Laubier 1960;Otto 2000a). Two of these genera are monotypic.…”

Diseases of Echinodermata. Ill Agents metazoans (Annelida to Pisces)

“…Dexter (1977) found in the gut of the echinoid Plesiodiadema indicum (Viets 1939). Three specimens were collected in echinoid material dredged by the Albatross off North Moluccas, Indonesia.…”