Limnesia magnipora Besch, 1969 –

K, Harry Smit, Pešić, Vladimir, K & K, Simon Clavier, 2022, Water mites from French Guiana, with the description of 14 new species (Acari: Hydrachnidia), Acarologia 62 (4), pp. 1119-1153 : 1125

Limnesia magnipora Besch, 1969 – syn. nov.

Type material — Syntype male, Boschbeek, Toemoek-Hoemak geb. [= mountain], Temomairem, Surinam [idiosoma damaged, palp separated but not mounted, P5 missing, most legs missing], 28 Jul. 1939, leg. D.C. Geijskes ( RMNH.ACA.5585).

New record — 0/1/0, Crique Aya, National Reserve La Trinité, 4.603164°N, 53.414064°W,

4 Nov. 2018, leg. S. Clavier.

Distribution — Surinam ( Besseling 1949); French Guiana (this study).

Remarks — Thus far only the male was known, and therefore a description is given below of the female.

Description — Female – Idiosoma dorsally 551 long and 501 wide, ventrally 575 long. Dorsal and ventral shield present, both shields punctated. Dorsal shield with three pairs of glandularia, near Dgl-1 a short ridge ( Figure 3A). An indistinct lineation visible on the dorsal shield. Coxae fused with ventral shield, suture lines of coxae incomplete; anterior coxae with short apodemes. Vgl-4 located medially of suture line Cx-III/IV ( Figure 3B). Genital field 120 long, not incorporated in the ventral shield, with three pairs of acetabula. Length of P1-5: -, 80, 51, 104, 28. P2 ventrally with a stout seta on a short tubercle ( Figure 3C). Length of I-leg-4-6:

76, 84, 92 (till tip of segment). Length of IV-leg-4-6: 106, 108, 101. Terminal seta of IV-leg-6

76 long ( Figure 3D). III-leg-5 and IV-leg-4 with four swimming setae, III-leg-4 and IV-leg-5 with two swimming setae. I-III-leg claws with ventral clawlet.

Remarks — Besseling (1949) stated that the ventral seta of P2 is inserted directly on the segment, without a setal tubercle. Examination of the holotype shows that this is not correct. The seta of P2 is inserted on a distinct setal tubercle. Besch (1969) described a second species of this subgenus, i.e. Limnesia magnipora Besch, 1969 . The only difference we see with L. surinamensis is the ridge near Dgl-1, which is more near the anterolateral margin of the dorsal shield. However, we think this is due to the way Besch illustrated the species. L As. magnipora is in all other characters similar to L. surinamensis , we propose to synonymize the two species.