Naiadacarus sidorchukae, Klimov & Oconnor & Khaustov, 2019
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publication ID |
https://doi.org/ 10.11646/zootaxa.4647.1.28 |
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publication LSID |
lsid:zoobank.org:pub:76D3D826-7173-444A-BDB4-F2537F325155 |
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persistent identifier |
https://treatment.plazi.org/id/03DB8787-FFD8-FF89-7DD4-49A6FD4EACBE |
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treatment provided by |
Plazi |
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scientific name |
Naiadacarus sidorchukae |
| status |
sp. nov. |
Naiadacarus sidorchukae , sp. n.
Naiadacarus sp. Khaustov at al., 2018: 33, Fig. 20C,D.
Type material. Holotype: phoretic deutonymph (slide 28.1)— RUSSIA, Tyumen region, near Uspenka, 57°04 N, 65°04 E, pine-spruce coniferous forest, ethanol wash of pheromone trap with numerous specimens of Ips typographus ( Coleoptera : Curculionidae : Scolytinae ) collected by this trap, 22 May 2017, A. Khaustov. Paratypes: 30 phoretic deutonymphs (slides 10, 11, 13, 14, 15, 16, 17, 18, 24, 27, 28, 64, 67, some slides with multiple specimens)— same data; 1 phoretic deutonymph—same data, 28 May 2017; 11 phoretic deutonymphs—same data, 05 Jun 2017.
Type deposition. Holotype and 1 paratype (slide 28) deposited in ZISP; 10 paratypes (slides 13, 18) in UMMZ; 31 paratypes (remaining slides) in TSUMZ.
Phoretic deutonymph ( Table 1 View TABLE 1 : measurements). Body broadly ovoid, widest in sejugal region ( Figs. 1–4 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 ); idiosomal length 147–167 (158±8, n=10), width 107–131 (117±7, n=10). Gnathosoma consisting of relatively elongate subcapitular remnant and very short, rounded palps bearing palpal solenidia (ω) apically and filiform dorsal palpal setae (dm) dorsolaterally; supracoxal setae of palps (elc p) absent from subcapitular remnant, their positions marked by somewhat refractile spots ( Figs. 2 View FIGURE 2 , 4 View FIGURE 4 ). Positions of ventral subcapitulars and ventral palpal tibials on the gnathosomal remnants also marked by refractile spots ( Figs. 2 View FIGURE 2 , 4 View FIGURE 4 ).
Dorsum ( Figs. 1 View FIGURE 1 , 2 View FIGURE 2 , 5A View FIGURE 5 , 6A View FIGURE 6 ). Propodosoma and hysterosoma each covered by heavily punctate shield. Internal vertical setae (vi) short, positioned slightly anterior to apex of propodosomal sclerite, with adjacent bases; external vertical setae (ve) absent; internal scapular setae (si) distinctly posterior and medial to external scapulars (se); supracoxal setae of legs I (scx) filiform, positioned on thin sclerites above legs I. Sejugal furrow well developed. Hysterosoma with 11 pairs of simple, filiform setae on hysterosomal shield (c 1, c 2, c p, d 1, d 2, e 1, e 2, f 2, h 1, h 2, h 3), setae h 3 distinctly longer than others. Distance d 1 -c 1 10-19 (14±3, n=10), d 1 –e 1 26–38 (31±3, n=10); ratio d 1 -c 1 / d 1 - e 1 1.57–3.57 (2.34±0.58, n=10). Opisthonotal gland openings (gla) between setae c 2 and e 2, situated much closer to latter. Of four fundamental pairs of cupules, only two pairs observed: ia between setae c 2 and c p, ih ventral, lateral to posterior portion of attachment organ.
Venter ( Figs. 3 View FIGURE 3 , 4 View FIGURE 4 , 5B View FIGURE 5 , 6B View FIGURE 6 ). Coxal fields sclerotized, covered with longitudinal wrinkles; coxal fields IV more heavily sclerotized in anterior half. Anterior apodemes of coxal fields I fused forming sternum. Anterior apodemes of coxal fields II curved medially. Posterior apodemes of coxal fields II broad, curved medially; there is substantial distance between their posterior ends and apices of anterior apodemes III; very finely granular sclerotization present in this area. Anterior apodemes of coxal fields III fused with each other and anterior apodemes of coxal fields IV. Posterior medial apodeme well developed, extending from anterior apodemes IV almost to genital opening. Posterior apodemes IV short, transverse, positioned directly anterior to attachment organ. Dorsal hysterosomal shield separated from ventral surface by a distinct suture on each side. Subhumeral setae (c 3) short, filiform, positioned on ventral surface between legs II–III, adjacent to sutures separating dorsal shield from venter. Coxal setae 1a, 3a, 4b, g filiform; 4a in form of small, rounded conoids. Genital region in posterior portion of coxal fields IV; opening elongate, with two pairs of genital papillae within genital atrium; papillae relatively large, two segmented, with rounded apices ( Fig. 6B View FIGURE 6 ). Coxal setae (4b) positioned at junctions of anterior coxal apodemes IV and posterior median apodeme; genital setae (g) laterad of genital opening. Attachment organ posterior to coxal fields ( Figs. 4 View FIGURE 4 , 6B View FIGURE 6 ). Anterior suckers (ad 3) round, median suckers (ad 1+2) slightly larger, consisting of large sclerotized margins surrounding paired vestigial alveoli. Pair of small refractile spots anterolateral to median suckers (ps 3). Lateral conoidal setae of attachment organ (ps 2) situated slightly posterior to a line joining centers of median suckers; posterior conoidal setae (ps 1) posterior to median suckers (ad 1+2) and slightly more medial. Anterior and posterior lateral and posterior median cuticular conoids well developed. Anus positioned between anterior suckers (ad 3).
Legs ( Figs. 7–10 View FIGURE 7 View FIGURE 8 View FIGURE 9 View FIGURE 10 ). Legs elongate, all segments free. Trochanters I–III each with filiform seta (pR I–II, sR III). Femoral setation 1-1-0-1; setae vF I–II and wF IV filiform, smooth. Genual setation 2-2-0-0; setae mG and cG I–II somewhat spine-like, seta nG III absent. Tibial setation 2-2-1-1; setae gT and hT I–II and kT III–IV spine-like. Tarsal setation 8-9-8-8; tarsus I with 5 thinly foliate setae (ra, la, p, q, and f), seta d elongate and filiform, seta e spoon-shaped, seta wa filiform to somewhat spine-like, setae aa and ba absent ( Figs. 7 View FIGURE 7 A-B, 8A-B); tarsus II similar to tarsus I except seta ba present and filiform and spoon-shaped apex of seta e virtually absent ( Figs. 7 View FIGURE 7 C–D, 8C–D). Tarsus III with 8 setae (w, r, s, p, q, e, f, d) smooth, setae e, f, and w slightly flattened apically ( Figs. 9 View FIGURE 9 A-B, 10 A–B). Tarsus IV similar to tarsus III except seta w longer, thicker and distinctly barbed, and setae d and f longer ( Figs. 9 View FIGURE 9 C–D, 10 C–D). Solenidia ω 1 on tarsi I–II cylindrical, with rounded apices; ω 3 on tarsus I shorter than ω 1, with bul- bous apex, positioned directly adjacent to ω 1; ω 2 of tarsus I thin, expanding slightly apically, positioned somewhat more basal and posterior to ω 1 + ω 3 group (in the holotype, ω 2 on the same level as ω 1 + ω 3 group); φ of tibiae I–III elongate, tapering; φ II 20–32 (27±3, n=23), shorter than tarsus II, ratio tibial solenidion φ II/tarsus II: 0.62–0.93 (0.79±0.08, n=23); φ IV short and stout; σ of genu I elongate, tapering slightly, σ of genu II shorter, cylindrical, σ of genu III absent (when absent, position marked by refractile spot) or present (short). Famulus ε of tarsus I short, pointed, adjacent to solenidion ω 1. All pretarsi consisting of hooked empodial claws arising from tarsal apices, short paired condylophores visible within tarsal apices.
Diagnosis. Phoretic deutonymphs of Naiadacarus sidorchukae differ from those of N. fashingi by a shorter tibial solenidion φ II, 20–32 (27±3, n=23); this solenidion is shorter than tarsus II, ratio tibial solenidion φ II/tarsus II is 0.62–0.93 (0.79±0.08, n=23) ( Figs. 7C View FIGURE 7 , 8C View FIGURE 8 ). In N. fashingi , tibial solenidion φ II is longer, 35–49 (42±4, n=23), as long as tarsus II, ratio tibial solenidion φ II/tarsus II is 0.94–1.17 (1.02±0.05, n=23).
Etymology. The new species is named after the late Ekaterina (Katya) Sidorchuk (1981-2019), who made a major contribution in mite paleontology by introducing breakthrough techniques in studying fossil specimens and describing a large number of important taxa.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.