Dynatozetes asetosus, ErmilovK, 2024

Dynatozetes asetosus n. sp.

Zoobank: 14A566E5-E4C6-4447-A2C0-22B6200C39E9

( Figures 1 View Figure 1 , 2 View Figure 2 )

Material examined — Holotype (female) and two paratypes (two females): Western Venezuela, Merida State, 2300 m a.s.l., 10 km E Tabay, sweeping in cloud forest, 28.IV.1981

(L. Masner and Marsh).

Type deposition — The holotype is deposited in the collection of the Canadian National Collection, Ottawa, Canada ; two paratypes are in the collection of the Tyumen State University Museum of Zoology, Tyumen, Russia. All specimens are preserved in 70% solution of ethanol with a drop of glycerol.

Diagnosis — Body length: 855–930. Rostrum with small, semi-oval protruding. Prolamella present. Rostral, lamellar and bothridial setae long, setiform, barbed; ro and le longer than bs ; interlamellar seta represented by alveolus. Notogaster and anogenital region foveolate. Six pairs of notogastral porose areas, of these, four pairs in posteroperipheral position; Aa oval,

others rounded. Epimeral, genital and aggenital setae setiform, thin, slightly barbed; anal and adanal setae short, setiform, thin, roughened. Leg trochanter IV with anterodorsal process. Dorsal porose area on tarsi I, II not observable.

Description of adult — Measurements – Body length: 930 (holotype), 855, 915 (female paratypes); notogaster width (level of pteromorphs): 840 (holotype), 825 (female paratypes); ventral plate width: 750 (holotype), 705 (female paratypes).

Integument – Body color brown. Surface with dense microgranules (visible under high magnification, 10 × 100); notogaster and anogenital region with small poorly observable foveolae; lateral side of body partially with dense microgranulate cerotegument.

Prodorsum ( Figs 1a, 1c View Figure 1 , 2a View Figure 2 ) – Rostrum with small, semi-oval protruding (visible in anterior view). Lamella (including cusp) about 2/3 length of prodorsum, with short cusp having strong lateral tooth; translamella absent; prolamella lineate, located medial to insertions of rostral and lamellar setae; tutorium ridge-like, with small tooth distally. Sublamellar porose area oval (26– 30 × 19–22). Rostral (112–131), lamellar (112–131) and bothridial (101–106) setae setiform, barbed; interlamellar seta represented by alveolus; exobothridial seta (45–49) setiform, thin, slightly barbed. Dorsosejugal porose area diffuse, located posterolateral to interlamellar seta.

Notogaster ( Figs 1a, 1c, 1d View Figure 1 ) – Dorsosejugal suture interrupted medially. Pteromorph broadly rounded laterally. Six pairs of porose areas, with four pairs in posteroperipheral position; Aa oval (41–52 × 19–26), others (15–26) rounded; A1 anteromedial to A 1. All notogastral setae represented by alveoli. Opisthonotal gland opening and all lyrifissures (except ia) distinct.

Gnathosoma ( Figs 2b–2d View Figure 2 ) – Subcapitulum size: 195–202 × 172–184; subcapitular seta a (22–26) setiform, brushed distally; subcapitular setae m (75–86) and h (52–60) and both adoral setae (26) setiform, barbed. Palp length: 157–165; setation: 0–2–1–3–9(+ω); postpalpal seta

(7–9) spiniform, smooth. Chelicera length: 206–225; setae (cha: 71–75; chb: 56–60) setiform, barbed.

Epimeral and lateral podosomal regions ( Figs 1b, 1c View Figure 1 ) – Epimeral setal formula: 3–1–3–3;

all setae (1a, 1c, 2a, 3a: 45–49; others: 71–90) setiform, thin, slightly barbed. Humeral porose areas Am and Ah elongate oval, poorly observable. Custodium long, thorn-like. Discidium triangular. Circumpedal carina long, distally fused to custodium.

Anogenital region ( Figs 1b–1d View Figure 1 ) – Anogenital setal formula: 6–1–2–3; genital and aggenital setae (45–49) setiform, thin, slightly barbed; anal and adanal setae (19) setiform, thin, roughened. Adanal lyrifissure located close and slightly oblique to anterior half of anal plate. Marginal porose area represented by numerous oval and elongate oval parts.

Legs ( Figs 2e–2h View Figure 2 ) – Median claw distinctly thicker than lateral ones, all slightly barbed dorsally; each lateral claw with small tooth ventrodistally. Trochanter IV with strong anterodorsal process. Dorsoparaxial porose area on femora I–IV, trochanters III, IV, ventrodistal porose area on tibia I–IV and proximoventral porose area on tarsi I–IV well visible; dorsal porose area on tarsi I, II not observable. Formulas of leg setation and solenidia: I (1–5–3–4–20) [1–2–2],

II (1–5–3–4–15) [1–1–2], III (2–3–1–3–15) [1–1–0], IV (1–2–2–3–12) [0–1–0]; homology of setae and solenidia indicated in Table 1.

Remarks — The new species differs from all species of the genus in the presence of the prolamella (versus prolamella absent) and the setiform bothridial seta (versus bothridial seta with well-developed head). Distinctive characters between species within of the genus Dynatozetes can be found in the identification key below.

Etymology — The species name asetosus refers to the absence of interlamellar setae.