Planaturus pileatus Smit, 2017

K, Harry Smit & PešićK, Vladimir, 2024, New records of notoaturine water mites from New Zealand, with the description of five new species (Acari: Hydrachnidia: Notoaturinae), Acarologia 64 (2), pp. 499-524 : 510

Planaturus pileatus Smit, 2017

Figures 6 , 14E

New records — South Island. 0/1/0, Highest tributary of Warbeck crossing Maruia Saddle Rd, Murchison, interstitial, 42°01.880′ S, 172°17.695′ E, alt. 535 m asl., 17 Febr. 2023. 0/1/0, tributary of Warbeck crossing Maruia Saddle Rd, Murchison, 42°00.261′ S, 172°19.373′ E, alt.

360 m asl., 17 Febr. 2023. 0/1/0, Camp Creek, Lake Kaniere Scenic Reserve, 42°50.313′ S, 171°09.910′ E, alt. 156 m asl., 13 Febr. 2023. 0/1/0, Rough and Tumble Creek, interstitial, Moana, 42°36.174′ S, 171°34.890′ E, alt. 111 m asl., 21 Dec. 2022. 2/2/0, Shag River, interstitial, crossing Mc Donald Road, E of Ranfurly, 45°20.700′ S, 170°36.297′ E, alt. 84 m

asl., 24 Jan. 2023, 1/0/0 dissected and slide mounted (RMNH).

Remarks — Thus far, the male was unknown, and therefore a description is given below.

Description. Male — Idiosoma dorsally (till tip of hood) 388 long and 242 wide, ventrally

369 long. Eye pigment visible. Dorsal shield typical for the genus Planaturus , smooth and with small pores ( Figure 14E ), 270 long and 192 wide; unpaired anteromedial plate 134 long and 144 wide; unpaired posteromedial plate 136 long and 137 wide; anterolateral platelet 169 long, posterolateral platelet 84 long. Anterodorsal part of ventral shield forming a projecting hood-like structure with a concave anterior margin as illustrated in Figure 6 A-B, Cx/II and -III pointed and somewhat projecting; gnathosomal bay 84 long; glandularia Cxgl-4 located near Cx-III/IV suture line; projections associated with insertions of fourth legs relatively broad, a pair of glandularia located medial to these projections. Genital field with several acetabula present on each side, gonopore terminal, 47 long; a medially located group of small setae extending anteriorly from gonopore ( Figure 6C ). Ejaculatory complex ( Figure 6D ) 94 long.

Palp: dorsal length/height (ratio in parentheses): P1, 16/11 (1.43); P2, 33/33 (1.0); P3,

26/22 (1.16); P4, 39/19 (2.08); P5, 19/9 (2.0); P2 with ventrodistal extension, none of the setae on P-2 greatly lengthened or expanded, P4 with a median ridge ( Figure 6 G-H). Gnathosoma ( Figure 6F ) ventrally 60 long (without apodemes), 81 with apodemes, anterodorsal part of gnathosoma blunt and only slightly projecting; chelicera 97 long. Dorsal length of I-leg-2-6: 41, 34, 41, 38, 39; dorsal length of IV-leg-2-6 ( Figure 6I ): 80, 33, 38, 39, 53; greatest height of IV-leg-2, 45.

Distribution — Known from South Island only ( Smit 2017, Smit and Pešić 2020).

Figures

Figure 6 Planaturus pileatus Smit, 2017, Shag River (A-D, F-I, male; E, female). A – idiosoma, dorsal view; B – hood-like structure on anterodorsal part of ventral shield; C idiosoma, ventral view; D – photograph of ejaculatory complex; E – anterodorsal part of ventral shield; F – gnathosoma and palpal segments P1 and P2; G-H – palp; I – IV-leg-2-6. Scale bars = 100 μm.

Figure 14 Photographs of dorsal shield. A – Evidaturus scopticus Cook, 1983, male holotype, stream on Wainui Rd (from: <https://collections.tepapa.govt.nz/object/125039>); B –Kritaturus sornus Cook, 1983, female, Longbeach Creek; C – K. jacundusCook, 1983,