Allogalumna paravojnitsi, Ermilov, Sergey G. & Starý, Josef, 2020

Ermilov, Sergey G. & Starý, Josef, 2020, Two New Species Of Allogalumna (Acari, Oribatida, Galumnidae) From Madagascar, Acta Zoologica Academiae Scientiarum Hungaricae 66 (2), pp. 99-110 : 105-108

Allogalumna paravojnitsi sp. n.

( Figs 5–6)

Diagnosis. Body size: 332–348 × 232–265. Rostrum rounded. Bothridial seta long, with long stalk and small, elongate head, truncated and ciliated apically. Rostral, lamellar and interlamellar setae setiform, smooth, ro of medium size, le and in short. Dorsosejugal porose area oval. Dorsosejugal suture absent. Four pairs of notogastral porose areas, Aa triangular, transversely oriented, others rounded. Median pore present. Epimeral and anogenital setae short, setiform, smooth. Postanal porose area oval. Solenidion of tibia IV in- serted in the middle of the segment. Sexual dimorphism not observed.

Description. Measurements. Body length 348 (holotype, female), 332–348 (five para- types, one female and four males); notogaster width 249 (holotype), 232–265 (five paratypes). No clear differences between females and males in body size.

Integument. Body color light brown. Body surface (including pteromorphs, subca- pitular mentum, genital and anal plates, legs) sparsely microfoveolate (visible under high magnification, × 1000). All leg femora and trochanters III, IV with rounded or elongate tubercles antiaxially.

Prodorsum ( Figs 5A, 6A). Rostrum broadly rounded. Sublamellar line slightly visi- ble, thin, curving backwards. Prodorsal leg niches and lateral ridges of prodorsum well-de- veloped. Rostral (26–28), lamellar (6–8) and interlamellar (2) setae setiform, thin, smooth, ro thickest. Bothridial seta (73–82) with long stalk and small, elongate head, truncated and ciliated apically. Exobothridial seta represented by alveolus. Dorsosejugal porose area (12– 14 × 6–8) elongate oval, transversely oriented, located posterolateral to in.

Notogaster ( Figs 5A, 6A–C). Dorsosejugal suture absent. Dorsophragma elongated longitudinally, with variable number of components. With 10 pairs of setal alveoli and four pairs of porose areas, Aa (length 24–32) triangular, transversely oriented, other porose areas rounded (6–10). Median pore present in both sexes, located between A1. All lyrifissures distinct, im located between lm and A1 and closer to the later, ip between p 1 and p 2, ih and ips close to each other, anterior to p 3. Opisthonotal gland opening located posterolateral to A1 and distanced from it.

posterior view. Scale bar: 50 µm

Gnathosoma. Generally, similar to Allogalumna paramadagascarensis sp. n. Subcapitu- lum longer than wide: 86–90 × 77–82. Three pairs of subcapitular setae setiform, smooth, a (12–14) longer and thicker than m (8–10) and h (6). Two pairs of adoral setae (10–12) setiform, roughened. Length of palp: 69–73. Axillary saccule distinct, elongated. Postpal- pal seta (4) spiniform, smooth. Length of chelicera: 102–106. Two cheliceral setae setiform, barbed, cha (30–32) longer than chb (18–20). Trägårdh’s organ of chelicera long, elongate triangular.

Epimeral and lateral podosomal regions ( Figs 5B, 6A). Anterior margin of epimere I smooth. Pedotectum I broadly rounded, pedotectum II quadrangular, rounded distally in ventral view. Discidium triangular. Circumpedal carina slightly visible, thin, directed to seta 3b, but distinctly not reaching it. Epimeral setal formula: 1–0–1–2. Epimeral setae setiform, thin, smooth, 3b (10) longer than 1b, 4a and 4b (6).

Anogenital region ( Figs 5B, 6A–C). Six pairs of genital (g 1, 10; g 2 – g 6, 6), one pair of aggenital (6), two pairs of anal (6) and three pairs of adanal (6) setae setiform, thin, smooth. Anterior edge of genital plate with two setae. Aggenital seta inserted between genital and anal apertures, closer to the former. Adanal lyrifissure located close and parallel to anal plate. Adanal setae ad 1 and ad 2 postanal, ad 3 paraanal and lateral to iad. Distance ad 1 – ad 2 equal to ad 2 – ad 3. Unpaired postanal porose area oval (20 × 6–8).

Legs. Generally, similar to Allogalumna paramadagascarensis sp. n. Median claw distinctly thicker than laterals, all smooth on dorsal side. Porose area on all femora and on trochanters III, IV well visible. 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 on tarsus I inserted lateral to solenidion ω 1. Solenidion of tibia IV inserted in the middle of the segment.

Material examined. Holotype (female) and five paratypes (one female and four males): Madagascar, Montagne d‘Ambre National Park, circuit Ampijoroana, evergreen rain forest, 12°31‘28‘‘S, 49°09‘52‘‘E, 950 m a.s.l., sifting of leaf litter sample under big uni- dentified tree, Winkler apparatus extraction, 13.I.2014 ( R. Ravebolun and L. Rabotenoson).

Type deposition. The holotype is deposited in the collection of the Senckenberg Insti- tute, Görlitz, Germany. Five paratypes are deposited in the collection of the Tyumen State University Museum of Zoology, Tyumen, Russia. All specimens are preserved in ethanol with a drop of glycerol .

Etymology. The species name paravojnitsi refers to the similarity between the new species and Allogalumna vojnitsi Mahunka, 1993 .

Remarks. Allogalumna paravojnitsi sp. n. is morphologically similar to Allogalumna vojnitsi Mahunka, 1993 from the Ethiopian region (see MAHUNKA 1993) in having small body size, bothridial seta with long stalk and short head truncated and ciliated apically, rostral seta of medium size, interlamellar setae short, four pairs of notogastral porose areas, median pore, and the absence of dorsosejugal suture. However, the new species differs from A. paravojnitsi by the presence of triangular notogastral porose areas Aa (versus rounded) and short lamellar setae (versus medium size).