Halacarellus hyrcanus ( Viets, 1928 )

Durucan, Furkan, 2020, Two new genera, Limnohalacarus and Soldanellonyx (Acari: Halacaridae) in freshwater halacarid mites with additional new records from Turkey, Persian Journal of Acarology 9 (1), pp. 1-11 : 3

Halacarellus hyrcanus ( Viets, 1928)

( Figs. 3 A-E)

Material examined

15 deutonymphs, 16 protonymphs, Lake Eğirdir-Isparta, on sediments and stones, 19 August 2019, coll. F. Durucan.

Morphology and notes

Idiosoma of deutonymphs between 400–410 long, 270–278 wide. AD, OC and PD reticulated. AD 100–103 long, 110–112 wide. OC 65–67 long, 55–57 wide. PD 225–228 long, 164–167 wide ( Fig. 3A ). AE with 3 pairs of ventral setae. AE 93–95 long, 212–215 wide. PE with 1 dorsal, 2 ventral setae. PE 135–138 long, 75–78 wide. GA with 2 pairs of pgs and 2 pairs of large genital acetabula. GA 160–165 long, 150–155 wide ( Fig. 3B ). Gnathosoma 110–114 long, 73–75 wide. P-1, 12; P-2, 40; P-3, 17; P-4, 13 ( Fig. 3C ). Genu I with large ventral seta and 2 smaller ventromedial setae. Tibia I with 2 pairs of ventral setae ( Figs. 3D ). Idiosoma of protonymphs are between 280–300 long, 200– 210 wide. GA with one pair of large genital acetabula. GA of protonymph almost as long as wide (114). Each genital acetabula size is 20. ( Fig. 3E ). Halacarellus hyrcanus has previously recorded in both sexes from running water on 15 th May 2016 in from Kargi Stream, Fethiye by Durucan and Boyacı (2019). In this study, both nymphal stages (proto- and deutonymph) of the species have been recorded from standing water on 19 th August 2019.

Distribution Halacarellus hyrcanus was found from Caspian Sea, Baku-Azerbaijan by Viets (1928) for the first time and afterwards recorded from Rhine ( France, Germany, Netherlands), Bulgaria (Lake Varna), Romania (Danube delta, Sfintul Gheorghe, Plavisevita, Sulina) ( Bartsch 1998, 2004, 2009). Juveniles were reported from Wales ( Bartsch 2001). Turkey (Kargi Stream, Fethiye, Muğla) ( Durucan and Boyacı 2019) Present record: Lake Eğirdir (Isparta).

Figures

Figure 3. Halacarellus hyrcanus (Viets, 1928) (deutonymph) – A. Idiosoma, dorsal view; B. Idiosoma, ventral view; C. Gnathosoma, ventral view; D. Leg I, medial view; E. H. hyrcanus (protonymph) – E idiosoma, ventral view. Scale bars: A–C 100 µm, D–E 50 µm.