Pergalumna (Pergalumna) foveolatostriata, 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 : 469-471

Pergalumna (Pergalumna) foveolatostriata sp. nov.

( Fig. 3 )

Type material. Holotype (male) and two paratypes (two males): 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).

The holotype is deposited in the collection of the Senckenberg Museum of Natural History, Görlitz, Germany; two paratypes 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 foveolatostriata refers to the presence of foveolae and striae on body surface.

Diagnosis. Body length: 375–390. Body surface microgranulate; additionally, dorsal side, pteromorphs, anogenital region, partially epimeral region sparsely foveolate; foveolae on prodorsum, notogaster and in epimeral region smaller, partially connected by striae forming reticulate pattern. Rostrum rounded. Rostral and lamellar setae medium-sized, setiform, roughened; interlamellar seta short, needleform; bothridial seta long, setiform, barbed. Dorsosejugal porose area present. Dorsosejugal suture complete. Posterior part of notogaster slightly concave. Three pairs of porose areas developed: Aa oval, located between setal alveoli la and lm, slightly nearer to la; A1 and A3 rounded. Median pore present. Lyrifissure im located anterolaterally to A1 and removed from it. Epimeral and anogenital setae comparatively short, slightly roughened. Circumpedal carina bifurcate, medial carina directed to 3b, lateral carina directed to pedotectum II. 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.

Description of adult. Measurements. Body length: 390 (holotype), 375, 390 (paratypes); notogaster width: 315 (holotype), 300, 307 (paratypes).

Integument ( Figs 3A–D ). Body color dark brown to black. Body surface densely microgranulate (visible under high magnification, 1000). Additionally, dorsal side, pteromorphs, anogenital region including anal plates, partially epimeral region sparsely foveolate; foveolae on prodorsum, notogaster and in epimeral region small (up to 2) partially connected by striae forming reticulate pattern; foveolae on pteromorphs and in anogenital region larger (up to 4) not connected striae but striae present on pteromorphs. Lateral sides of epimeres with some strong longitudinal striae. Antiaxial side of leg femora I–IV and trochanters III and IV partially striate and tuberculate.

Prodorsum ( Figs 3A, C ). Rostrum rounded. Lamellar and sublamellar lines thin, parallel, curving backwards. Rostral and lamellar setae (30–34) setiform, roughened; le located close to L. Interlamellar seta (4) needleform. Bothridial seta (86–97) setiform, densely barbed. Dorsosejugal porose area oval (9–11 × 4–6), transversely oriented, located posterolaterally to insertion of in. Dorsophragma comparatively short, slightly elongate longitudinally.

Notogaster ( Figs 3A, C, D ). Dorsosejugal suture complete. Posterior part of notogaster slightly concave. All notogastral setae represented by setal alveoli. Three pairs of porose areas developed, clearly bordered: Aa (13–15 7–11) oval, located between setal alveoli la and lm, slightly nearer to la; A1 (9–11) and A3 (9–11) rounded. Median pore present, located between A1. Opisthonotal gland opening and all lyrifissures distinct: gla located laterally to A1; im anterolaterally to A1 and removed from it; ip between p 1 and p 2, nearer to p 2; ih anteriorly to p 3; ips between p 2 and p 3.

Gnathosoma. Generally, similar to P. (P.) cienfuegosensis sp. nov. Size of subcapitulum: 94–102 × 82–86; setae setiform: a (15–19) and m (9–11) roughened; h (6) smooth; a thickest, h thinnest; adoral seta (11–13) setiform, barbed. Length of chelicera: 123–131; cheliceral setae (cha: 41–43; chb: 28–30) setiform, barbed. Length of palp: 79–82; postpalpal seta (4) spiniform, smooth.

Epimeral and lateral podosomal regions ( Figs 3B, C ). Anterior margin of ventral plate smooth. Epimeral setal formula: 1–0–2–3; setae (1a, 4a, 4b: 7–9; 3b, 3c, 4c: 13–15) setiform, slightly roughened. Circumpedal carina bifurcate, medial carina medium-sized, directed to 3b, lateral carina long, directed to pedotectum II.

Anogenital region ( Figs 3B–D ). Genital (g 1: 11–13; others: 7–9), aggenital (7–9), anal (7–9), and adanal (7–9) setae setiform, slightly roughened. Anterior edge of genital plate with two setae, but the third pair slightly removed from edge. Aggenital seta located posterolaterally to genital aperture. 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. Generally, similar to P. (P.) cienfuegosensis sp. nov., but tibia IV without dorsal tooth.

Remarks. Pergalumna (Pergalumna) foveolatostriata sp. nov. is similar to P. (P.) lenticulata Ermilov & Friedrich, 2016 from Peru in main morphological traits: body with striae and foveolae; bothridial seta setiform; dorsosejugal suture present; three pairs of rounded notogastral porose areas; interlamellar seta minute. However, the new species differs from the latter by the smaller body size (length: 375–390 versus 929–1162), the ornamentation of body (prodorsum, notogaster and partially epimeral region with foveolae connected by short striae forming reticulate pattern; anogenital region foveolate versus prodorsum striate; foveolae and striae on notogaster not connected and not forming reticulate pattern; epimeral region partially tuberculate; anogenital region with foveolae and striae), rounded (versus with two lateral teeth) rostrum, long (versus medium-sized) bothridial seta, localization of notogastral porose area Aa (located slightly nearer to la than to lm versus located close to lm), slightly concave (versus broadly rounded) posterior part of notogaster, the presence (versus absence) of median pore, long circumpedal carina directed to pedotectum II (versus medium-sized, directed to 3b), the absence (versus presence) of lenticulus, and the localization of solenidion in posterior part of the leg tibia IV (versus in anterior part).

Figures

FIGURE 3. Pergalumna (Pergalumna) foveolatostriata 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 100 μm.