Hydrodroma reinhardi Pešić, 2002

Gerecke, Reinhard, 2017, The water mites of the genus Hydrodroma (Acari, Hydrachnidia, Hydrodromidae) in Europe and Africa, Ecologica Montenegrina 13, pp. 1-24 : 19-22

publication ID	https://doi.org/ 10.37828/em.2017.13.1
DOI	https://doi.org/10.5281/zenodo.12717674
persistent identifier	https://treatment.plazi.org/id/B5628784-FFD9-FFBD-FF46-3596FDBBFEC4
treatment provided by	Felipe
scientific name	Hydrodroma reinhardi Pešić, 2002
status

Treatment

( Figs 8 View Figure 8 A-D)

Type series (not examined): NHMB, holotype ♂, river Cijevna near Dinoša, 45 m asl., 01.07.2000 Pešić; same site and date, paratypes: 2 ♂♂, 2 ♀♀ ; further paratypes, University of Podgorica , collection Pešić: same site and date, 2 ♂♂, 8 ♀♀ same site, 01.10.2000, 6 ♂♂, 7 ♀♀.

Material examined: Coll. Gerecke, all slide mounted: Paratypes: Montenegro, River Cijevna near Dinoša, 45 m asl., 01.07.2000, Pešić , 1 ♂ ; same site, 01.10.2000, 2 ♂♂, 1 ♀. Further material: France, Corse F 23 Corse Sarténe (2A), Roccapina. F. Ortolo near Pont de l'Ortolo , 20 m asl., 8°51E, 41°33N, 26.09.1991 Gerecke, 1 ♀ GoogleMaps ; F 92 Galéria (2B), Rau. de Tavulaghiu NE Pinzu di Corbi , 150 m asl., 11.06.1993 Gerecke 1 ♀ ; Italy, Lazio, I 883, Sorinano nel Cimino , spring in castagneto exp. NW, 1000 m asl., 01.08.2000 Di Sabatino, Gerecke, Goldschmidt, 1 deutonymph ; Sardinia I 365, Gennargentu ( NU). Fonni, R. Mattalle, 950 m, NK 23 32, 18.05.1986, Gerecke, 2 ♂♂ ; I 380, Alghero (SS), R. Serra S Cantoniera Rudas, 20 m, MK 47 96, 26.05.1986, Gerecke, 1 ♀ , 4 deutonymphs; I 386, Monte Linas ( CA), Villacidro, stream 2 near P. S. Miali, 600 m, MJ 74 67, 30.05.1986 Gerecke, 1 ♀ Barbágia Seúlo ( NU), W Seúlo, Contrada Tornolù, 650 m, NK 17 14, 18.09.1991 Gerecke, 1 ♂ .

Discussion: The detailed original description does not leave important questions open, some additional morphological features could be verified from the material authorized by Pešić listed above. Hydrodroma reinhardi is similar to H. despiciens in the range of acetabula numbers (genital field: Fig. 8 B View Figure 8 ), but differs in a smooth medial margin of Cx-I ( Fig. 8 A View Figure 8 ), lower swimming setae numbers (only on IV-L-4, 2 anterior setae, posterior setae numbers II-L-5, 1; III-L-4, 2-4; IV-L-5, 3-4; IV-L-4, 4-5; IV-L-5, 3-4) and relatively larger leg claws (L 15-16 % segment 5). Further differences concern generally minor measurements of palp and leg segments (e.g., P-4 L 143-187 vs. 184-190 in H. despiciens ; IV-L-5 L 239-311 vs. 332-410) and the shape of the integument: the papillosity consists of two different types as in H. despiciens , but the larger central papillae are not rounded, apically forming blunt tips ( Figs 8 View Figure 8 C-D).

The deutonymph has not been described previously. The examined specimens show the characteristic integument papillosity as in adults and the diagnostic low swimming setae number: II-L-5, posterior, 1; III-L-4, posterior, 2 III-L-5, posterior, 2; IV-L-4, anterior 1, posterior 2; IV-L-5, posterior, 2.

Biology and distribution: A running water species frequently found in springs. Central Mediterranean, recently reported also from Russia (area of Yaroslavl, Caucasus: Tuzovskij 2015); here recorded for the first time from continental Italy (Lazio).