Galumna miniporosa, Ermilov, Sergey G., Starý, Josef, Sandmann, Dorothee, Marian, Franca & Maraun, Mark, 2013

Ermilov, Sergey G., Starý, Josef, Sandmann, Dorothee, Marian, Franca & Maraun, Mark, 2013, New taxa and new records of oribatid mites of the family Galumnidae (Acari: Oribatida) from Ecuador, Zootaxa 3700 (2), pp. 259-270 : 265-267

Galumna miniporosa sp. nov.

( Fig. 3 A–D)

Diagnosis. Body size 290–298 × 207–215. Rostral and lamellar setae short; interlamellar setae minute; sensilli clavate, with unilaterally dilated, ciliate head. Lamellar setae inserted considerably nearer to the interlamellar setae than to rostral setae. Anterior notogastral margin not developed. Four pairs of porose areas rounded or oval; A2 smallest. Median pore absent. Ventral setae short. Postanal porose area very long, narrow in males.

Description. Measurements. Body length: 298 (holotype), 290 (paratype); notogaster width: 207 (holotype), 215 (paratype).

Integument. Body color brown. Body surface smooth. Anterio-lateral parts of notogaster with distinct, numerous muscle sigillae.

Prodorsum. Rostrum widely rounded. Rostral (12) and lamellar (8) setae thin, smooth. Interlamellar setae minute (2). Lamellar setae inserted considerable nearer to the interlamellar setae, than to rostral setae. Sensilli (49) with unilaterally dilated head; sensillar head rounded distally, with long, strong cilia. Exobothridial setae absent. Lamellar (L) and sublamellar lines distinct, strong, parallel medio-distally, but weakly divergent basally. Porose areas Ad present, oval.

Notogaster. Anterior notogastral margin not developed medially. Dorsophragmata long. Notogastral setae represented by 11 pairs of alveoli (a pair of additional setae c x present). Four pairs of porose areas present (Aa oval, 12–16 × 8–12; A1 rounded, 6–8; A2 very small, 4; A3 rounded, 8, or oval, 8–12 × 6–8). Alveoli of setae la inserted posteriorly to Aa. Lyrifissures im located between lm and lp. Opisthonotal gland openings located laterally to A1. Median pore absent.

Gnathosoma. Morphology of subcapitulum, palps and chelicerae typical for Galumnidae (Engelbrecht 1972 a; Ermilov & Anichkin 2011).

Epimeral and lateral podosomal regions. Four pairs of epimeral setae visible ventrally; 1a, 3b, 4a and 4b short (4–6), thin, smooth. Discidia triangular, circumpedal carinae distinct.

Anogenital region. Six pairs of genital, one pair of aggenital, two pairs of anal and three pairs of adanal setae similar in length, short (4–6), thin, smooth. Anterior part of genital plates with two setae. Adanal setae ad 3 inserted laterally to lyrifissures iad. Postanal porose area very long, narrow (106 × 4–8).

Legs. Three claws of each leg smooth; lateral claws thinner than median claw. Morphology of leg segments, setae and solenidia typical for Galumnidae (Engelbrecht 1972 a; Ermilov & Anichkin 2011). Homology of setae and solenidia indicated in Table 1 .

Material examined. Holotype (male) and paratype (male): Ec-2 (01.04.2009).

Type deposition. The holotype is deposited in the collection of the Zoological Institute of the Russian Academy of Sciences, St. Petersburg, Russia; paratype is in the personal collection of the first author. is deposited in the collection of the Tyumen State University Museum of Zoology, Tyumen, Russia.

Etymology. The specific name miniporosa refers to the small porose areas A2.

Remarks. In having the combination of main morphological characters (sensilli with dilated, ciliate head; interlamellar setae represented by alveoli or minute; rostral and lamellar setae short; notogaster with four pairs of rounded or oval porose areas), Galumna miniporosa sp. nov. is similar to G. comparabilis Engelbrecht, 1972 from South Africa (see Engelbrecht 1972 c), G. flabellifera Hammer, 1958 from tropics and subtropics (see Hammer 1958; Aoki 1964, 1965, 1982), G. gl a br a Pérez-Íñigo & Baggio, 1991 from Brazil (see Pérez-Íñigo & Baggio 1991), G. minuta (Ewing, 1909) from Central America (see Jacot 1935), G. nuda Engelbrecht, 1972 from South Africa (see Engelbrecht 1972 c), G. parva Woodring, 1965 from U.S.A. (see Woodring 1965), G. perezi Pérez-Íñigo & Baggio, 1994 from Brazil (see Pérez-Íñigo & Baggio 1994), however it clearly differs from these species by the absence of anterior margin of notogaster (versus developed in the other species), presence of very long postanal porose area in males (versus oval or absent in the other species) and the position of lamellar setae (inserted nearly the interlamellar setae versus similarly removed from rostral and interlamellar setae).

Figures

FIGURE 3. Galumna miniporosa sp. nov., adult: A—body dorsally; B—body ventrally (gnathosoma and legs not illustrated); C—prodorsum, pteromorph and anterior part of notogaster dorso-laterally; D—notogaster posteriorly. Scale bar 50 Μm.