Pergalumna (Pergalumna) cienfuegosensis, Ermilov & Kolesnikov & Kontschán & Klimov, 2023

Ermilov, Sergey G., Kolesnikov, Vasiliy B., Kontschán, Jenő & Klimov, Pavel B., 2023, Taxonomic contribution to the knowledge of Galumnidae (Acari, Oribatida, Galumnidae) from Cuba, Zootaxa 5258 (4), pp. 465-474 : 466-469

Pergalumna (Pergalumna) cienfuegosensis sp. nov.

( Figs 1 , 2 )

Type material. Holotype (female) and eight paratypes (five males and three females): Cuba, 221′N, 807′W, Cienfuegos Province, Sierra del Escambray, El Nicho, leaf litter in mixed forest (unknown date and collector; collection of the Tyumen State University Museum of Zoology , Tyumen, Russia; Gashev et al. 2005).

Additional (non-type) material: 26 specimens: same data as for the holotype and paratypes; 14 specimens: Cuba, 226′N, 816′W, leaf litter in riparian (200 m from ocean) mixed forest (unknown date and collector; collection of the Tyumen State University Museum of Zoology , Tyumen, Russia; Gashev et al. 2005) .

The holotype is deposited in the collection of the Senckenberg Museum of Natural History, Görlitz, Germany; eight paratypes and non-type material are deposited 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.

Etymology. The species name cienfuegosensis refers to the place of origin of the type material, Cienfuegos Province.

Diagnosis. Body length: 300–345. Body surface microgranulate; in some specimens, prodorsum with short longitudinal striae and/or notogastral region between porose areas Aa and A1 sparsely foveolate. Rostrum rounded. Rostral and lamellar setae medium-sized, setiform, roughened; le located on thin carina reaching from L; interlamellar seta vestigial; bothridial seta medium-sized, fusiform, with barbed head. Dorsosejugal porose area present.Dorsosejugal suture absent. Three pairs of porose areas developed: Aa elongate oval, located between setal alveoli la and lm, equally removed from them; A1 banana shaped; A3 oval. Median pore absent. Lyrifissure im located anterolaterally to A1 and removed from it. Epimeral and anogenital setae comparatively short, smooth. Circumpedal carina directed to insertion of 3b. Adanal lyrifissure located close and parallel to the middle of anal plate. Postanal porose area absent. Leg solenidion on tibia IV inserted in posterior part of the segment; strong tooth behind solenidion.

Description of adult. Measurements. Body length: 330 (holotype), 300–345 (paratypes); notogaster width: 240 (holotype), 225–240 (paratypes).

Integument ( Figs 1A ; 2A, E–H ). Body color brown. Body surface densely microgranulate (visible under high magnification, 1000). Additionally, prodorsum ( Fig. 2A ) of specimens in population from riparian mixed forest nearly ocean with short longitudinal striae (versus without striae in population from mixed forest from El Nicho, Sierra del Escambray, Cienfuegos Province). Posterior part of prodorsum (anteriorly to interlamellar setae) with slight transverse striate band; posterior part of notogaster (behind adanal setae ad 1 and ad 2) often with slight archlike striate band or indistinct furrow. In some specimens notogastral region between porose areas Aa and A1 slightly sparsely foveolate (diameter of foveola up to 2). Antiaxial side of leg femora I–IV and trochanters III and IV partially striate and tuberculate.

Prodorsum ( Figs 1A, C ; 2A ). Rostrum slightly protruding, rounded. Lamellar and sublamellar lines thin, parallel, curving backwards. Rostral (22–26) and lamellar (30–34) setae setiform, roughened; le located close to L, inserted on thin carina reaching from L. Interlamellar seta vestigial. Bothridial seta (45–52) fusiform, head densely barbed. Dorsosejugal porose area oval (11–15 × 6), transversely oriented, located posterolaterally to insertion of in. Dorsophragma comparatively short, slightly elongate longitudinally.

Notogaster ( Figs 1A, C, D ). Dorsosejugal suture completely absent. All notogastral setae represented by setal alveoli. Three pairs of porose areas developed, poorly bordered: Aa (34–45 × 7–11) transversely elongate oval, located between setal alveoli la and lm, equally removed from them; A1 (34–45 × 7–11) banana shaped; A3 (11– 13 × 7–9) oval. Median pore absent. Opisthonotal gland opening and all lyrifissures distinct: gla and im located anterolaterally to A1 and removed from it; ip anteriorly to p 2; ih and ips close to each other, between im and p 3.

Gnathosoma ( Figs 2B–D ). Size of subcapitulum: 75–82 × 67–75; setae setiform: a (17–19) roughened; m (15–17) slightly barbed; h (9–11) smooth; a thickest, h thinnest; adoral seta (11–15) setiform, barbed. Length of chelicera: 112–116; cheliceral setae (cha: 34; chb: 22) setiform, barbed. Length of palp: 75–82; postpalpal seta (4) spiniform, smooth.

Epimeral and lateral podosomal regions ( Figs 1B, C ). Anterior margin of ventral plate smooth. Epimeral setal formula: 1–0–2–3, setae (1a, 4a, 4b: 4; 3b, 3c, 4c: 11) setiform, smooth. Circumpedal carina medium-sized, directed to insertion of 3b.

Anogenital region ( Figs 1B–D ). Genital (g 1: 11; others: 4), aggenital (4), anal (7–11), and adanal (7–11) setae setiform, smooth. Anterior edge of genital plate with three setae. Adanal lyrifissure located close and parallel to the middle of anal plate. 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. Postanal porose area absent.

Legs ( Figs 2E–H ). Median claw distinctly thicker than lateral claws, all slightly barbed on dorsal side. Tibia IV with dorsal tooth close and posteriorly to solenidion. Porose area on all femora and on trochanters III, IV well visible; proximoventral porose area on tarsi and distoventral porose area on tibiae not observed. 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 short inserted posterolaterally to solenidion ω 1. Solenidion on tibia IV inserted in posterior part of the segment.

Remarks. Pergalumna (Pergalumna) cienfuegosensis sp. nov. is similar to P. (P.) cardosensis Pérez-Íñigo & Baggio, 1986 from the Neotropical region and P. (P.) infinita Mahunka, 2011 from Madagascar in main morphological traits: rostrum rounded; bothridial seta with developed head; dorsosejugal suture absent; three pairs of notogastral porose areas, with Aa transversely elongate, located between la and lm; interlamellar seta vestigial or absent. However, the new species differs from both species by the banana shaped (versus rounded) of notogastral porose area A1. Also, P. (P.) cardosensis has larger body size (length: 468 versus 300–345), short (versus mediumsized) lamellar seta, triangular (versus elongate oval) notogastral porose area Aa, and slightly barbed (versus densely barbed) head of bothridial seta; P. (P.) infinita has long (versus medium-sized) stalk of bothridial seta, and small (versus large) notogastral porose area Aa.

Figures

FIGURE 1. Pergalumna (Pergalumna) cienfuegosensis sp. nov., adult: A—dorsal view; B—ventral view (gnathosoma, pteromorphs and legs omitted); C—right lateral view (gnathosoma, legs and pteromorph omitted); D—posterior view (part of left half omitted). Scale bar 50 μm.

FIGURE 2. Pergalumna (Pergalumna) cienfuegosensis sp. nov., adult: A—prodorsum, dorsal view; B—subcapitulum, ventral view; C—palp, left, paraxial view; D—chelicera,left, paraxial view; E—leg I, right, antiaxial view; F—leg II, right, ventroantiaxial view; G—leg III, left, antiaxial view; H—leg IV, left, antiaxial view. Scale bars 50 μm (A, E–H), 20 μm (B–D).