Floridotarsonemus humeophilus, MashkovK & KhaustovK & GoncharovK, 2023

MashkovK, Kirill A., KhaustovK, Alexander A. & GoncharovK, Anton A., 2023, First record of Floridotarsonemus from Russia (Acari: Heterostigmata: Tarsonemidae) with a new species description, Acarologia 63 (4), pp. 1211-1218 : 1213-1215

publication ID	https://doi.org/ 10.24349/8rdx-1y0u
publication LSID	lsid:zoobank.org:pub:BA1AB319-AABC-42EC-926E-AD44458EF587
persistent identifier	https://treatment.plazi.org/id/A47BB179-CE26-6C4A-FE0A-73EE0C8FF8AC
treatment provided by	Felipe
scientific name	Floridotarsonemus humeophilus
status	sp. nov.

Treatment

Floridotarsonemus humeophilus n. sp.

Zoobank: 18111E83-E675-4933-B1CC-5A4390B5BCE1

( Figs 1–5 View Figure 1 View Figure 2 View Figure 3 View Figure 4 View Figure 5 )

Female — Gnathosomal capsule ( Figs 2A, B View Figure 2 , 3A View Figure 3 ) subtriangular in shape, 1.5 times longer than wide, connected with idiosoma with membranous cuticle. Length of gnathosomal capsule 28 (28–30), width 18 (15–20). Palpcoxal setae pp () 9 (9–12) present laterally. Dorsal gnathosomal setae ch () 13 (12–14) smooth, simple. Palpi short 10 (9–10), with tiny setae

(dGE) and round inconspicuous process on distal extremity. Ventral gnathosomal setae m () 12 (10–14) smooth and pointed. Cheliceral stylets 8 (7) and their levers short. Pharynx medium, muscular, with thin walls, width of pharynx 5 (5–6) occupies 1/3 part of gnathosomal width ( Fig. 3A View Figure 3 ). Idiosomal dorsum ( Figs 1A View Figure 1 , 3C, D View Figure 3 ). Prodorsal shield expanded laterally. Stigmata small, round, located partially under prodorsal shield; trachea long, thin and narrow, without sclerotized sacks. Bothridia present, trichobothria sc 1 () clearly elongated, pilose, almost completely covered by prodorsal shield. Alveolar pits v 2 located at the same distance from both bases of setae v 1 and sc 2. All tergites with regular tiny puncta and delicate striation near posterior margin. Each tergite with smooth posterior margins. All dorsal setae smooth; setae

h weakly blunt-tipped, other setae pointed. Lengths of dorsal setae: v 1 15 (16–21), sc 2 26 (26–28), c 1 14 (12 – 15), c 2 16 (14 – 18), d 9 (9–11), e 7 (7–9), f 12 (11–13), h 6 (5–6). Distances between setae: v 1 – v 1 31 (32–33), v 2 – v 2 41 (40–42), sc 2 – sc 2 51 (46–50), c 1 – c 1 78 (76–82),

c 2 – c 2 104 (100–107), c 1 – c 2 31 (29–33), d–d 39 (36–41), e–e 70 (67–72), e–f 30 (25–31), f –f

17 (15–22), h–h 37 (33–38).

Idiosomal venter ( Figs 1B View Figure 1 , 3A, B View Figure 3 ). All ventral plates with tiny uniform puncta. Prosternal apodeme (appr) distally with small y-shaped bifurcation and nodule in middle part, not fused with sejugal apodeme (apsej). Apodemes 2 (ap2) not fused with prosternal apodeme (appr),

with two nodules: one in the middle part, other at the end. Sejugal apodeme indistinct,

continuous. All ventral setae smooth and pointed. Lateral ends of apodemes 3 (ap3) extended laterally, apodemes 3 with three nodules. Apodeme 4 (ap4) with nodules, anterior ends of apodemes not fused with poststernal apodeme (appo). Posterior ends of ap 4 reach base of setae

3 b. Tegula 6 (5–7) long, 13 (13–15) wide, with slightly convace sides. Posterior sternal plate with angular sharp process between trochanter III and IV. Length of ventral setae a:8 1(8–9),

2 a 13 (13–14), 3 a 11 (11–13), 3 b 12 (9–12), ps 8 (7–9). Width of tegula 13 (13–15), length of tegula 6 (5–7).

Legs ( Figs 4A–E View Figure 4 , 5A, B View Figure 5 , 3A, B View Figure 3 ). Chaetotaxy (including unguinal setae u′, u″ on tibiotarsus I and u″ on tarsi II and III) of leg I: Fe4–Ge4–TiTa6(2 ϕ) +10(1 ω); leg II: Fe3–Ge3–Ti4–Ta7(1 ω);

leg III: FeGe1+3–Ti4–Ta6; legIV: FeGe1+1–TiTa1+1. Length of legs: I 47 (48–53), II 48

(45–46), III 43 (41–43), IV 28 (22–24). Leg I ( Figs 4A, B View Figure 4 ). Femur with flange ( Fig. 4B View Figure 4 ).

Solenidion ω elongated, digitiform; solenidia ϕ 1 and ϕ 2 clublike and elongate; seta k 3 (3–4)

baculiform, slightly shorter that solenidion ϕ 1. Lengths of solenidia: ω 5 (5–6), ϕ 1 5 (5), ϕ 2 3

(2–3). Setae: l″, l′, and d of femur barbed and blunt-tipped; seta v″ pointed and barbed. Seta

l′ of genu barbed and blunt-tipped, other setae pointed and barbed. Setae d, pv″ of tibiotarsus smooth and pointed, seta s spiniform, eupathidia p′ (, p″, tc′, tc″) smooth and blunt-tipped, other setae pointed and barbed. Leg II ( Figs 4C–E View Figure 4 ). Solenidion ω 6 (5–6) elongated, digitiform.

Femur with distinct flange ( Fig. 4E View Figure 4 ). Tibia with characteristic sharp process. ( Fig. 4D View Figure 4 ). Seta

d of femur smooth, stout, blunt-tipped; seta l′ blunt-tipped, stout, barbed; seta v″ pointed and barbed. All setae of genu barbed and pointed. Tibia setae v″, l′, and v′ pointed and barbed;

seta d smooth and pointed. Tarsus setae tc′, tc″, pv′ pointed and barbed; seta pv″ pointed and smooth; seta pl″ spiniform and located distally from solenidion ω close to base of seta tc″ ;

seta u′ smooth, spiniform, u″ very small, pointed and smooth. Leg III ( Fig. 5A View Figure 5 ). Setae v′Fe of femorogenu smooth, blunt-tipped; seta v′Ge barbed and pointed; setae l″Ge and l′Ge smooth and pointed. All tibial setae weakly barbed and pointed. Tarsal setae tc′ and pv″ barbed and pointed; setae tc″, pv′, and u″ smooth and pointed; seta u′ smooth, blunt, stout. Leg IV. ( Fig. View Figure 5

5B). All setae smooth and pointed; measurements: v′Fe 6 (6–8), v′Ge 7 (8–10), v′Ti 11 (11–13),

tc″ 42 (43–45).

Males and juvenile stage are unknown.

Type material — Female holotype, Slide ZISP T-Tar-003, Krasnodar Krai, vicinity of the city of Krasnodar, winter wheat field, extracted from soil, 6 April 2022, coll. A.A. Goncharov. Paratypes: 8 females, same data.

Type deposition — The holotype and one paratype are deposited in ZISP (Zoological Institute of Russian Academy of Sciense, St. Petersburg, Russia); other paratypes are deposited in the collection of the TSUMZ (Tyumen State University Museum of Zoology, Tyumen, Russia).

Etymology — The name of the species is a combination of two words, Latin humus meaning soil and Greek φίΛΟΣ meaning love and refers to the soil habitat in contrast to plant habitats of other Floridotarsonemus species.