Pergalumna (Pergalumna) saonaensis Ermilov, 2024, sp. nov.
Creators: name: Ermilov, Sergey G.
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Sarcoptiformes
Galumnidae
Pergalumna
Pergalumna saonaensis

description: Pergalumna (Pergalumna) saonaensis sp. nov. (Figs. 1–15)
http://zoobank.org/ urn:lsid:zoobank.org:act: FD739146-CA13-4FBD-A54C-2B52D2D53808
Type material
Holotype (female) and nine paratypes (five males and four females): Dominican Republic, 18° 09′ N, 68° 41′ W, La Altagracia Province, Saona Island, leaf litter in the mixed forest (data and collector unknown; collection of the University Tyumen, Museum of Zoology, Tyumen, Russia).
Type deposition
The holotype is deposited in the collection of the Senckenberg Museum of Natural History, Görlitz, Germany; nine paratypes are in the collection of the University of Tyumen, Museum of Zoology, Tyumen, Russia. All specimens are preserved in 70% solution of ethanol with a drop of glycerol.
Diagnosis
Body length: 405–465. Body surface densely microgranulate. Rostrum with two incisions. Rostral, lamellar and interlamellar setae long, setiform, barbed; relative length: in ˃ le = ro; bothridial seta longest seta on prodorsum, setiform, rigid, heavily barbed in mediodistal part, directed laterad. Dorsosejugal porose area present. Dorsosejugal suture interrupted medially. Four pairs of porose areas in typical case; Aa elongate oval or oval, transversely oriented, located close and anteromedially to la and distanced from lp; A1, A2 rounded or oval; A1 located anterolaterally to A2; A3 rounded; occasionally, porose areas A1 and A2 fused into one elongate oval porose area. Median pore absent. Opisthonotal gland opening posterolaterally to A1; lyrifissure im anterolaterally to A1. Epimeral and anogenital setae comparatively short. Circumpedal carina medium-sized. Postanal porose area absent or minute. Leg tibia IV with small dorsal tooth posteriorly to insertion of solenidion; famulus slightly curved mediodistally, directed forwards, inserted between seta ft” and solenidion ω 2; solenidion of tibia IV inserted in posterior part of segment.
Description
Measurements – Body length: 450 (holotype), 405–450 (male paratypes); 450–465 (female paratypes); notogaster width: 345 (holotype), 315–337 (male paratypes); 337–345 (female paratypes).
Integument – Body color brown. Body surface densely microgranulate; additionally, prodorsum and epimere I with partially dense short poorly observable stria. Anogenital region and posterior part of notogaster with poorly observable striate bands.
Prodorsum – Rostrum with two narrow, oblique incisions; rostral parts tightly connected to each other, therefore, incisions poorly observable in non-dissected specimens. Lamellar and sublamellar lines thin, parallel, curving backwards mediodistally; mediobasal part of L thickened; S thin. Rostral (52–60), lamellar (52–60) and interlamellar (75–82) setae setiform, barbed; in erect; insertion of le close to L; bothridial seta (97–109) setiform, rigid, heavily barbed in mediodistal part, directed laterad (in dorsal aspect). Dorsosejugal porose area oval (15–17 × 7–9), located posterolaterally to insertion of in. Dorsophragma elongate longitudinally.
Notogaster – Dorsosejugal suture interrupted medially. All notogastral setae represented by setal alveoli. Four pairs of porose areas developed in typical case: Aa elongate oval (32–37 × 9–15) or oval (22 × 15), transversely oriented; A1, A2 rounded (11–19) or oval (22–26 × 11–19); A3 rounded (11 × 19); occasionally (sometimes asymmetrically), porose areas A1 and A2 fused into one elongate oval porose area (34–41 × 11–19); Aa slightly distanced from pteromorphal hinge, located close and anteromedially to la and distanced from lp; A 1 in lateral position on notogaster, located anterolaterally to A2, distance A1–A1 larger than A2–A2. Median pore absent in males and females. Opisthonotal gland opening and all lyrifissures distinct: gla located posterolaterally to A1; im anterolaterally to A1; ip anteriorly or anteromedially to p 1; ih and ips close to each other, anteriorly to p 3.
Gnathosoma – Size of subcapitulum: 105–112 × 90–101; subcapitular seta a (24–26) setiform, roughened; m (24–26), h (15–19) as well as both adoral setae (11–13) setiform, barbed. Length of palp: 79–86; setation: 0–2–1–3–9(+ω); postpalpal seta (7) spiniform, smooth. Length of chelicera: 154–157; setae (cha: 45–49; chb: 30–34) setiform, barbed.
Epimeral and lateral podosomal regions – Epimeral setal formula: 1–0–2–3; setae 4a, 4b (7– 9), 1a (11–13) setiform, slightly roughened; 3b (19–26), 3c, 4c (26–34) setiform, slightly barbed. Circumpedal carina medium-sized, directed slightly laterally to insertion of seta 3b.
Anogenital region – Anogenital formula: 6–1–2–3; genital (g 1: 11; g 2: 7–11; others: 7–9), aggenital (7–9), anal (7–9), and adanal (7–9) setae setiform, slightly roughened; anterior edge of genital plate with three setae; aggenital seta located between genital and anal apertures, closer to the former; adanal setae ad 1 and ad 2 posteriorly, ad 3 laterally to anal plate; distance ad 1 – ad 2 slightly shorter than ad 2 – ad 3. Adanal lyrifissure located close and parallel to the middle of anal plate. Postanal porose area absent or represented by small (1–4), rounded, poorly observable. Ovipositor size: 188– 198 × 36–41; length of blade: 79–86; length of distal section (beyond middle fold): 109–112; each of the three blades with four smooth setae: ψ 1 ≈ τ 1 (37–41) rod-like; ψ 2 ≈ τa ≈ τb ≈ τc (19–22) and six coronal setae (7) thinly thorn-like.
Legs – Median claw distinctly thicker than lateral claws; all claws slightly barbed on dorsal side. Tibia IV with small dorsal tooth located close and posteriorly to insertion of solenidion. Porose area on femora I–IV and on trochanters III, IV distinct; proximoventral porose area on all tarsi and distoventral porose area on all tibiae not observable. 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 slightly curved mediodistally, directed forwards, inserted between seta ft” and solenidion ω 2; solenidion of tibia IV inserted in posterior part of segment.
Note: Roman letters refer to normal setae; Greek letters to solenidia (except ɛ = famulus); single quotation mark (’) designates setae on the anterior and double quotation mark (”) setae on the posterior side of a given leg segment; parentheses refer to a pair of setae.
Comparison
Pergalumna (Pergalumna) saonaensis sp. nov. is most similar to P. (P.) pauliensis Pérez-Íñigo & Baggio, 1991 from Mexico (see Pérez-Íñigo & Baggio 1991) in the following main traits: body surface without heavy sculpturing or ornamentation; rostrum without tooth; rostral region without longitudinal ridge; bothridial seta long, setiform; interlamellar seta long; dorsosejugal suture interrupted medially; four pairs of notogastral porose areas; median pore absent. However, the new species differs from the latter by the following traits: rostrum with two incisions (versus narrowly rounded); bothridial seta heavily barbed in mediodistal part, directed lateral (versus shortly ciliate unilaterally, directed posterolaterad); notogastral porose area Aa located close and anteromedially to setal alveolus la and distanced from lp (versus between la and lm and equally distanced from them); A 1 in lateral position on notogaster, located anterolaterally to A2 (versus in dorsal position on notogaster, located anteromedially to A2).
Also, specimens of P. (P.) saonaensis sp. nov. having three pairs of notogastral porose areas (if A1 and A2 fused into one elongate oval porose area) is most similar to P. (P.) sura P. Balogh, 1997 (see P. Balogh 1997) and P. (P.) plumata Pérez-Íñigo & Baggio, 1986 (see Pérez-Íñigo & Baggio 1986; Ermilov et al. 2014 a) from the Neotropical region in the following main traits: body surface without heavy sculpturing or ornamentation; rostrum without tooth; rostral region without longitudinal ridge; bothridial seta long, setiform; interlamellar seta long; dorsosejugal suture interrupted medially; three pairs of notogastral porose areas, with Aa elongate oval, transversely oriented; median pore absent. However, the new species differs from both by the morphology and directions of the bothridial seta (heavily barbed in mediodistal part, directed lateral versus shortly ciliate unilaterally, directed posterolaterad) and the location of the notogastral porose area Aa (close and anteromedially to setal alveolus la and distanced from lp versus between la and lm and equally distanced from them).
Etymology The species name saonaensis refers to the place of origin, Saona Island.
description: Published as part of Ermilov, Sergey G., 2024, Oribatid mites (Acari, Oribatida) of Saona Island, Dominican Republic, pp. 733-743 in Persian Journal of Acarology 13 on pages 736-741, DOI: 10.22073/pja.v13i4.85922, http://zenodo.org/record/14668642