Atractides remyi, (ANGELIER, 1951)

Gerecke, Reinhard, 2003, Water mites of the genus Atractides Koch, 1837 (Acari: Parasitengona: Hygrobatidae) in the western Palaearctic region: a revision, Zoological Journal of the Linnean Society 138, pp. 141-378 : 269

ATRACTIDES REMYI ( ANGELIER, 1951)

Megapus remyi Angelier, 1951

Syn. to A. latipes (Szalay, 1935) : Angelier, 1954a

Type series: No access. Loci typici: France, Corse. Golo, près de Ponte- Castirla, 280 m, 25.08.1950, 2 ♀ ; Golo, à Ponte-Leccia, 160 m, 30.08.1950, 1 ♀; Rivière du Vecchio, sous le col de Vizzavona, 980 m, 20.08.1950, 1 ♀.

Discussion: In the preliminary publication, the author discussed only the diagnostic differences with A. distans and A. diastema , two taxonomically distant species. Later he noticed the similarity to A. latipes , and synonymized A. remyi with that species. Most measurements slightly exceed the values provided here for A. latipes , but the important proportions are in good agreement (e.g. I-L-5 dL/HB 2.43, L I-L-5/6 1.38). Dimensions of the palp as calculated from Angelier’s data are (L/H, L/H ratio, relative L): P-1 25/24, 1.04, 09; P-2 58/40, 1.45, 21; P-3 76/36, 2.11, 27; P-4 84/25, 3.36, 30; P-5 34/–, -, 12; total L 277, P-2/4 ratio 0.69.

However, the (admittedly sketchy) figures of the specimens from Corsica published in 1954 depict the following differences to A. latipes : S-1 and -2 sharply pointed, not blunt, and S-1 considerably enlarged, I-L-6 extremely narrowed at HB, and setation of palps rather uniform, without particularly enlarged and flattened dorsal setae. For the time being the synonymization of A. remyi with A. latipes is accepted, but we should keep in mind that in Corsica the presence of a modified island sister species of A. latipes is possible. This should be clarified by future variability studies.

ATRACTIDES GRACILIPES ( ANGELIER, 1951)

( FIG. 58A–C )

Megapus gracilipes Angelier, 1951

Type series: No access. Locus typicus: France, Corse, Ruisseau affluent du San Pietro, au pied du col de Bavella, sous un pont de bois de la route Forestière 4, 400 m environ, 27.08.1950, 1 ♂ .

Description:

General features

Original description, female unknown dorsal integument:?; muscle attachments: not sclerotized coxal field: mediocaudal margin of Cx-1 between apodemes of Cx-2 extremely narrow; suture lines Cx-3/4 curved, in their medial part directed to the posterior margin of Cx-3 + 4

I-L: I-L-5 not enlarged distally, S-1 and -2 moderately distanced, S-1 longer and more slender than S-2; I-L-6 curved, equal in H all over the segment, claws strong excretory pore: sclerotized; Vgl-1: fused to Vgl-2

palp: probably without sexual dimorphism, ventral margin P-2 equally convex, P-3 nearly straight, but in the distal part convex, P-4 1: 1: 1, rather slender, sword seta near proximoventral hair

Male

Original description genital field: round, anteriorly convex, posteriorly slightly indented, gonopore extending from Ac-1 to Ac-3, Ac in triangular position; genital setae: 30 idiosoma L/W 600/450; glandularia petites coxal field L 320; Cx-3 W –; Cx-1 + 2 –

I-L-5 dL 150, vL –, dL/vL –, HA-HC –, dL/HB –

S-1 L 95, L/W –, S-2 L 75, L/W –, interspace –, L S-1/2 1.26

I-L-6 L 120, HA-HC –, dL/HB –; L I-L-5/6 1.25

genital field L/W 105/120, Ac-1–3 L –

gnathosoma –; chelicera –

Figures

Figure 58. A–C, Atractides gracilipes ♂, from E. Angelier (1954). A, ventral idiosoma; B, palp, lateral view; C, I-L-5 and - 6. D–L Atractides corsicus, from E. Angelier (1954). D, ♂ coxal and genital field, E, ♀ coxal and genital field; F, ♀ I-L-5 and -6; G, ♀ palp, medial view; H, ♂ palp, medial view, I ♂ genital field, K ♂ I-L-5 and -6, L ♀ genital field. Scale bars = 100 µm.