Allogalumna (Allogalumna) mozambiquensis Ermilov

Ermilov, Sergey G. & Bąkowski, Marek, 2021, Two New Species Of Galumnidae (Acari, Oribatida) From Mozambique, Acta Zoologica Academiae Scientiarum Hungaricae 67 (3), pp. 199-210 : 200-204

Allogalumna (Allogalumna) mozambiquensis Ermilov sp. n.

( Figs 1–3 )

Diagnosis. Body size: 315–332 × 249–257. Rostral seta of medium length, lamellar seta short, both setiform, roughened. Interlamellar seta minute. Bothridial seta long, with unilaterally dilated head having some cilia and well developed apical setiform tip. Dorsosejugal and postanal porose areas elongate oval. Dorsosejugal suture interrupted medially. Four pairs of porose areas developed, Aa transversely elongate triangular, A1 rounded, A2 and A3 elongate oval. Median pore present. Epimeral and anogenital setae short, setiform, roughened. Circumpedal carina absent. Solenidion on tibia IV inserted in the middle part of the segment.

Description of adult. Measurements. Body length: 315 (holotype: male), 315–332 (four paratypes, four males); notogaster width: 249 (holotype), 249–257 (four paratypes). Integument. Body color light brown. Body surface microporose (visible under high magnification in dissected specimens, × 1000). Leg femora I–IV and trochanters III, IV partially tuberculate.

Prodorsum ( Fig. 1A, C ). Rostrum rounded. Lateral structure N and ridges E, T well visible. Rostral (18–20) and lamellar (6–8) setae setiform, roughened; ro thicker than le. Interlamellar seta (2) setiform, thin, smooth. Bothridial seta (73–77) with longer stalk and shorter, elongate, unilaterally dilated head having three or four cilia and well developed apical setiform tip. Dorsosejugal porose area elongate oval (22–24 × 6–8), transversely oriented, located posterior to interlamellar seta. Dorsophragma distinctly elongated longitudinally.

Notogaster ( Fig. 1A, C, D ). Dorsosejugal suture interrupted medially. Ten pairs of setal alveoli present. Four pairs of porose areas developed: A1 transversely elongate triangular (length 10–14); A1 rounded (12–16); A2 and A3 elongate oval (16–20 × 12). Porose area Aa located close to pteromorphal hinge, anterior to setal alveolus la. Median pore represented by one fovea located posterior to virtual line connected porose areas A1. Opisthonotal gland opening and all lyrifissures distinct: gla located lateral to A1 and removed from it; im between lm and A1 (equal removed from them); ip posterior to A3; ih and ips close to each other, anterior to p 3 and removed from it.

Gnathosoma ( Fig. 2A–C ). Size of subcapitulum: 86–90 × 73–77. Subcapitular setae (a: 14–16; m: 12–14; h: 6–8) setiform, slightly barbed; h thinnest. Adoral seta (10–12) setiform, barbed. Length of chelicera: 102–106. Cheliceral setae (cha: 36–38; chb: 20–24) setiform, barbed. Length of palp: 65–69. Postpalpal seta (4) spiniform, smooth.

Epimeral and lateral podosomal regions ( Fig. 1B, C ). Epimeral setal formula: 1–0–1– 2. Setae (3b: 8–10; 1a, 4a, 4b: 4) setiform, thin, roughened. Pedotectum II rounded in ventral aspect. Discidium triangular. Circumpedal carina completely absent.

Anogenital region ( Fig. 1B–D ). Genital (g 1: 10–12; g 2: 8; g 3 – g 6: 4), aggenital (4), anal (4), and adanal (4) setae setiform, thin, roughened. Anterior edge of genital plate with three setae. Aggenital seta located between genital and anal apertures, slightly closer to the former. Adanal lyrifissure located close and parallel to anal plate. Adanal setae ad 1 and ad 2 posterior, ad 3 lateral to anal plate and iad. Distance ad 1 – ad 2 shorter than ad 2 – ad 3. Unpaired postanal porose area elongate oval (24–28 × 12).

Legs ( Figs 2D , 3A–C ). Median claw distinctly thicker than lateral claws, all smooth. Formulas of leg setation and solenidia: I (1–4–3–4–20) [1–2–2], II (1–4–3–4–15) [1–1–2], III (1–2–1–3–15) [1–1–0], IV (1–2–2–3–12) [0–1–0]; homology of setae and solenidia indicated in Table 1 . Famulus of tarsus I mini-stickform, slightly swollen and blunt-ended apically, inserted anterior to solenidion ω 1. Seta s of tarsus I eupathidial, located before setae a. Solenidia ω 1 and ω 2 on tarsus II and σ on genu III bacilliform, other solenidia setiform. Solenidion on tibia IV inserted in the middle part of the segment.

Material examined. Holotype (male) and four paratypes (four males): Mozambique, 18°29’00.1”S; 34°02’34.6”E, Sofala Province, Gorongosa District, Gorongosa National Park , 842 m a.s.l., soil-litter in riverine forest near Murombodzi Waterfall , 14.05.2019 (collected by Marek Bąkowski).

Type deposition. The holotype is deposited in the collection of the SMNH; four paratypes are deposited in the collection of the TSUMZ. All specimens are preserved in 70% solution of ethanol with a drop of glycerol.

Etymology. The specific name mozambiquensis refers to the country of origin, Mozambique.

Remarks. Allogalumna mozambiquensis Ermilov sp. n. differs from all species of the subgenus (and genus) by the bothridial seta with head having long setiform tip (versus setiform tip absent).

Figures

Fig. 1. Allogalumna mozambiquensis Ermilov sp. n., adult: A = dorsal view, B = ventral view (gnathosoma, legs and right pteromorph not shown), C = lateral view (gnathosoma, legs and pteromorph not shown), D = posterior view. Scale bar: 50 μm

Fig. 2. Allogalumna mozambiquensis Ermilov sp. n., adult: A = subcapitulum, ventral view, B = chelicera, left, paraxial view, C = palp, left, paraxial view, D = leg I, without trochanter, right, antiaxial view. Scale bar: 20 μm (A, B, D), 10 μm (C)

Fig. 3. Allogalumna mozambiquensis Ermilov sp. n., adult: A = leg II, without trochanter and tarsus, right, antiaxial view, B = leg III, without tarsus, right, antiaxial view, C = leg IV, left, antiaxial view. Scale bar: 20 μm