Pergalumna (Pergalumna) crassipora Mahunka, 1995

Ermilov, Sergey G. & Corpuz-Raros, Leonila, 2016, New species and records of Galumnidae (Acari, Oribatida) from the Philippines, Zootaxa 4171 (1), pp. 77-100: 92-97

publication ID

http://doi.org/10.11646/zootaxa.4171.1.3

publication LSID

lsid:zoobank.org:pub:6EBA3628-33FC-4756-9EAB-24DFD7BB56C1

DOI

http://doi.org/10.5281/zenodo.5657510

persistent identifier

http://treatment.plazi.org/id/FA654A24-FFBD-FF81-DBEF-BB3BFE8C4CBA

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Plazi

scientific name

Pergalumna (Pergalumna) crassipora Mahunka, 1995
status

 

Pergalumna (Pergalumna) crassipora Mahunka, 1995  

( Figs 32–43 View FIGURE 32 View FIGURE 33 View FIGURES 34 – 37 View FIGURES 38 – 43 )

Description. Measurements. Species with small body size. Females slightly larger than males. Body length: 265– 282 (24 specimens: all females), 249 (13 specimens: all males); notogaster width: 199–215 (24 specimens: all females), 190–199 (13 specimens: all males).

Integument ( Figs 32–34 View FIGURE 32 View FIGURE 33 View FIGURES 34 – 37 , 40, 41 View FIGURES 38 – 43 ). Body color light brown. Surface densely microgranulate (diameter of granules up to 1). Notogaster and ano-genital regions foveolate (diameter of foveoles up to 4). Pteromorphs striate in some specimens ( Fig. 40 View FIGURES 38 – 43 ). Ventral side with two lateral, transverse striate bands between genital and anal plates.

Prodorsum ( Figs 32–35 View FIGURE 32 View FIGURE 33 View FIGURES 34 – 37 , 38, 39 View FIGURES 38 – 43 ). Rostrum broadly rounded. Lamellar and sublamellar lines thin, parallel, curving backwards. Rostral (8–12) and interlamellar (16–22) setae setiform, thin, smooth, ro directed anteromedially, in— medially or medio-upwards. Lamellar setae (41–53) setiform, barbed, directed antero-medially. Bothridial setae (57–65) clavate, directed antero-laterad, with long, smooth stalks and shorter, barbed heads. Exobothridial setae and their alveoli absent. Sejugal porose areas absent.

Notogaster ( Figs 32 View FIGURE 32 , 34, 36 View FIGURES 34 – 37 , 40, 41 View FIGURES 38 – 43 ). Anterior notogastral margin not developed. Dorsophragmata slightly elongated longitudinally. Notogastral setae represented by 10 pairs of alveoli, however, minute setae c (4) present in some specimens ( Fig. 40 View FIGURES 38 – 43 ). Three pairs of porose areas rounded, with indistinct borders: A3 (10–12) shorter than Aa and A1 (both pairs 14–16) rounded. Porose areas Aa located between setal alveoli la and lm, very near to the former. Median pore present in males and females, very small, often poorly visible, inserted posterior to the virtual line connected porose areas A1. All lyrifissures distinct, im located antero-laterally to A1 and distanced from them. Opisthonotal gland openings located postero-laterally to A1.

Gnathosoma   ( Fig. 37 View FIGURES 34 – 37 ). Morphology of subcapitulum, palps and chelicerae as described in Galumna Heyden, 1826   and Pergalumna Grandjean, 1936   (e.g. Engelbrecht 1969; Ermilov & Anichkin 2011; Ermilov et al. 2011, 2014 c; Bayartogtokh & Akrami 2014). Subcapitulum size: 73–82 × 65–73. Subcapitular setae setiform, a (14–16) barbed, longer and thicker than smooth m and h (both pairs 8–10). Two pairs of adoral setae (8–10) setiform, barbed. Palp length: 53–57. Palp formula is typical (0–2–1–3–9+1ω). Axillary saccules distinct, slightly elongated. Chelicera length: 69–73. Cheliceral setae setiform, barbed, cha (24–26) longer than chb (16). Trägårdh’s organ elongate triangular, rounded distally.

Epimeral and lateral podosomal regions ( Figs 33 View FIGURE 33 , 34 View FIGURES 34 – 37 , 42 View FIGURES 38 – 43 ). Anterior margin of epimere I smooth. Setal formula: 1–0–1–3. Setae setiform, thin, smooth, 3b and 4c (10–14) longer than others (6). Pedotecta II rounded distally in ventral view. Discidia triangular. Circumpedal carinae (cp) directed to pedotecta I.

Anogenital region ( Fig. 33 View FIGURE 33 ). Six pairs of genital (g 1, 6–8; g 2– g 6, 4), one pair of aggenital (4), two pairs of anal (4) and three pairs of adanal (4) setae setiform, thin, smooth. Genital plates with two genital setae on anterior edges. Aggenital setae inserted between genital and anal apertures, nearer to the former. Adanal lyrifissures located close and parallel to anal plates. Setae ad 3 inserted laterally to iad. Distance ad 1– ad 2 slightly shorter than ad 2– ad 3. Postanal porose area absent.

Legs ( Fig. 43 View FIGURES 38 – 43 ). Morphology of leg segments, setae and solenidia as described in Galumna Heyden, 1826   and Pergalumna Grandjean, 1936   (e.g. Engelbrecht 1969; Ermilov & Anichkin 2011; Ermilov et al. 2011, 2014 c; Bayartogtokh & Akrami 2014). Claws of medium size, slightly serrate on dorsal sides, median claw distinctly thicker than laterals. 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 View TABLE 1 . Solenidia φ of tibiae IV inserted dorsally in anterior part of segments.

Material examined. 26 specimens (15 females and 11 males): Mt. Huraw , San Jose de Buan municipality   , Western Samar Province   , Samar Island, Philippines, 25 October 2002, collected by William Sm   . Gruezo, sample of secondary forest litter; 11 specimens (9 females and 2 males): Sibulan watershed , Polillo municipality, Polillo Island   , Quezon Province, Philippines, 27 September 2003, collected by Ireneo L. Lit, Jr. and Orlando L. Eusebio, sample of decaying log.  

Remarks. The specimens of Pergalumna (Pergalumna) crassipora Mahunka, 1995   from the Philippines are almost identical in general appearance to those from East Malaysia according to the original description ( Mahunka 1995). However, they are distinguishable from the latter by the longer interlamellar setae (in distinctly longer than ro vs. ro and in slightly different in length). We believe these differences represent intraspecific (perhaps geographical) variability.

Also, some specimens from the Philippines have striate pteromorphs and the presence of minute notogastral setae c on pteromorphs. Since these differences registered in both populations in the Philippines, we believe that it is intrapopulation variability. Hence, new data should be considered in any future identification of P. (P.) crassipora   .

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Sarcoptiformes

Family

Galumnidae

Genus

Pergalumna

Loc

Pergalumna (Pergalumna) crassipora Mahunka, 1995

Ermilov, Sergey G. & Corpuz-Raros, Leonila 2016
2016
Loc

Pergalumna (Pergalumna) crassipora

Mahunka 1995
1995
Loc

(Pergalumna) crassipora

Mahunka 1995
1995
Loc

Pergalumna (Pergalumna) crassipora

Mahunka 1995
1995
Loc

Pergalumna

Grandjean 1936
1936
Loc

Galumna

Heyden 1826
1826