Neoctenogalumna (Neoctenogalumna) gorongosaensis Ermilov, sp. n.
Creators: name: Ermilov, Sergey G.
name: Bąkowski, Marek
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Sarcoptiformes
Galumnidae
Neoctenogalumna
Neoctenogalumna gorongosaensis

description: Neoctenogalumna (Neoctenogalumna) gorongosaensis Ermilov sp. n.
(Figs 4–6)
Diagnosis. Body size: 298–332 × 190–207. Rostral and lamellar setae of medium length, setiform, roughened. Interlamellar seta minute. Bothridial seta clavate, heavily ciliate. Dorsosejugal porose area absent. Dorsosejugal suture slightly concave medially. Notogaster with specific ornamentation. Three pairs of rounded porose areas developed, A2 not observed. Median pore present. Epimeral and anogenital setae short, setiform, roughened. Circumpedal carina present. Postanal porose area narrowly elongate oval. Solenidion on tibia IV inserted in anterior part of the segment.
Description of adult. Measurements. Body length: 315 (holotype: female), 298–332 (paratypes: one male and three females); notogaster width: 199 (holotype), 190–207 (four paratypes).
Integument. Body color light brown. Body surface microgranulate (visible under high magnification in dissected specimens, × 1000). Pteromorph partially slightly striate. Leg femora I–IV and trochanters III, IV partially tuberculate and striate.
Prodorsum (Fig. 4A, C). Rostrum rounded. Lateral structure N and ridges E, T well visible. Rostral and lamellar setae (14–16) setiform, roughened. Interlamellar seta (2) setiform, thin, smooth. Bothridial seta (45–49) with longer stalk and shorter, clavate head having numerous cilia. Dorsosejugal porose area absent. Dorsophragma distinctly elongated longitudinally.
Notogaster (Fig. 4A, C, D). Dorsosejugal suture complete, slightly concave medially. Anterior part of notogaster with slight median specific ornamentation represented by longitudinal ridge and some lateral branches. Ten pairs of short (2), setiform, thin, smooth setae present. Three pairs of rounded porose areas developed (10–12); A2 not observed. Porose area Aa located close to pteromorphal hinge, anterior to seta la. Median pore represented by one fovea located posterior to virtual line connected porose areas A1. Opisthonotal gland opening and all lyrifissures distinct: gla and im located close to each other, anterolateral to A1 and removed from it; ip between p 1 and p 2; ih and ips close to each other, anteromedial to p 3 and removed from it.
Gnathosoma (Fig. 5A–C). Size of subcapitulum: 73–77 × 65–69. Subcapitular setae (a: 14–16; m: 10–12; h: 6) setiform, roughened; h thinnest. Adoral seta (10–12) setiform, barbed. Length of chelicera: 86–90. Cheliceral setae (cha: 30–32; chb: 18–20) setiform, barbed. Length of palp: 53–57. Postpalpal seta (4) spiniform, smooth.
Epimeral and lateral podosomal regions (Fig. 4B, C). Epimeral setal formula: 1–0–1– 2. Setae (3b: 8; 1a, 4a, 4b: 4) setiform, thin, smooth. Pedotectum II rounded in ventral aspect. Discidium triangular. Circumpedal carina of medium length, directed to insertion of 3b, but distinctly no reaching of it.
Anogenital region (Fig. 4B–D). Genital, aggenital, anal, and adanal setae (4) setiform, thin, smooth. Anterior edge of genital plate with two setae. Aggenital seta located between genital and anal apertures, equal removed from them. Adanal lyrifissure located close and diagonal to anal plate. Adanal setae ad 1 and ad 2 posterior, ad 3 lateral to anal plate and posterior to iad. Distance ad 1 – ad 2 slightly shorter than ad 2 – ad 3. Unpaired postanal porose area narrowly elongate oval (32 × 8).
Legs (Figs 5D, 6A–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 between solenidia ω 1 and ω 2. Seta s of tarsus I eupathidial, located before setae a. Solenidia ω 1 on tarsus I, ω 1 and ω 2 on tarsus II and σ on genu III bacilliform, other solenidia setiform. Solenidion on tibia IV inserted in anterior part of the segment.
Material examined. Holotype (female) and four paratypes (one male and three females): 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 Wa - terfall, 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.
Note: Roman letters refer to normal setae, Greek letters to solenidia (except ε = famu- lus). Single prime (’) marks setae on anterior and double prime (”) setae on posterior side of the given leg segment. Parentheses refer to a pair of setae
Etymology. The specific name gorongosaensis refers to the place of origin, Gorongosa National Park.
Remarks. Neoctenogalumna gorongosaensis Ermilov sp. n. is morphologically most similar to N. congoensis (Starý, 2005) in the bothridial seta with developed head, specific notogastral ornamentation and narrowly elongate postanal porose area, but differs from the latter by the smaller body size (298– 332 × 190–207 versus 388–403 × 232–245), heavily ciliate bothridial seta (versus bothridial seta barbed) and diagonal position of adanal lyrifissure (versus iad longitudinal).
description: Published as part of Ermilov, Sergey G. & Bąkowski, Marek, 2021, Two New Species Of Galumnidae (Acari, Oribatida) From Mozambique, pp. 199-210 in Acta Zoologica Academiae Scientiarum Hungaricae 67 (3) on pages 205-209, DOI: 10.17109/AZH.67.3.199.2021, http://zenodo.org/record/14548778