S. Mahunka szerk.: Folia Entomologica Hungarica 44/1. (Budapest, 1983)

Acinogaster balazsi sp. n., a new Pygmephorid species from Surinam (Acari: Tarsonemina) By S. MAHUNKA (Received December 1, 1982) Abstract: A new Pygmephorid species: Acinogaster balazsi sp.n. is described from Surinam. While staying in Surinam, Dr. D. BALÁZS (Budapest) has collected and extracted two soil samples for the Arachnoidea Collection of the Hungarian Natural History Museum, Budapest. This material also included Tarsonemina mites, of which one species is new for science and described hereunder. Family PYGMEPHORIDAE Acinogaster balazsi sp.n. Measurements. - Length: 210-219^nm, width: 126-134jam Dorsal side (Fig. 1): Prodorsum well chitinized. Peritremes large, originating far from each other. AU prodorsal setae short, the longest exobothridial setae nearly as long as sensillus. Notogastral setae - excepting setae h-^ - also short, Cj and c

2 equal in length, d-^ and f-^ slightly shorter. Setae e^ > f-, but hg > 6j. Among caudal setae ps^ twice as long as ps

2 and ps

3

. Ventral side (Fig. 3): The shape of apodemes and the chaetotaxy very similar to those of the genotype: Acinogaster marianae Cross, 1965. Legs: Tibiotarsus of leg I (Fig. 2) fusiform with a dark spot dorsally, between /-j andcJ^. Solenidium cJ

2 long, much longer than process of setae d. Solenidium CO j of legs II pointed at tip (Fig 5) and originating basally, jf j of legs II and III (Fig. 6) blunt at tip. Shape and chaetotaxy of leg IV as shown in Fig. 4. Material examined: Holotypus (814-HT-83): Suriname, Albina, 27.

Mai, 1981. leg. D. BALÁZS - soil sample from litter of tropical rain forest: 1 paratype from the same sample. Holotypus deposited in the Arachnoidea Collection of the Hungarian Natural History Museum, Budapest, paratype deposited in the Museum d'Histoire Naturelle, Geneva. Remarks: The new species is closely related to the type species of the genus Acinogaster Cross, 1965, however, setae Cj and c

2 the new species equal in length (c

2 twice as long as Cj in marianae Cross, 1965) and d^ much shorter than e-^ in the new species, while dj longer in the type species. I dedicate the new species to Dr. D. BALÁZS for his valuable material presented to our Museum.