Galumnopsis lanceosensilla, Ermilov, Sergey G. & Kalúz, Stanislav, 2012

Ermilov, Sergey G. & Kalúz, Stanislav, 2012, Four new species of the superfamily Galumnoidea (Acari: Oribatida) from Ecuador, Zootaxa 3481, pp. 27-38 : 35-37

Galumnopsis lanceosensilla sp. nov.

( Figs 19–24 )

Diagnosis. Body size 564–581 × 415–431. Surface of body smooth. Prodorsal setae present, short. Sensilli lanceolate, having one tooth in distal part. Three pairs of oval porose areas, median pore and postanal porose area present.

Description. Measurements. Body length 564 (holotype), 581 (paratype); body width 415 (holotype), 431 (paratype).

Integument. Body color brown. Surface of body smooth.

Prodorsum ( Figs 19 , 21, 23 ). Rostrum pointed in dorsal view. Rostral (length 12), lamellar (4) and interlamellar (4) setae short, thin and smooth. Sensilli (90–94) with oblong, narrow, lanceolate head, having one tooth in distal part. Porose areas Ad not evident. Lamellar and sublamellar lines well developed, parallel. Insertions of lamellar setae removed from lamellar lines. Exobothridial setae not present.

Notogaster ( Figs 19 , 23, 24 ). Anterior notogastral margin straight anteriorly. Pteromorphs smooth. Notogastral setae represented by 10 pairs of alveoli. Three pairs of oval porose areas developed, all 24–28 × 14–16. Median pore present, located at level of porose areas A1. Lyrifissures im not evident.

Gnathosoma . Morphology typical for Galumnellidae (see Grandjean 1931; Ermilov et al. 2010; Ermilov & Anichkin 2011a).

Epimeral region ( Fig. 20 ). Apodemes 1, 2, sejugal and 3 well visible. Six pairs of setiform, short (4), smooth epimeral setae observed. Epimeral setal formula: 1–1–2–2.

Anogenital region ( Fig. 20 ). Six pairs of genital (g 1, g 2 6, others 4), one pair of aggenital (4), three pairs of adanal (4) and two pairs of anal (4) setae setiform, smooth. Anterior part of genital plates with two genital setae (g 1, g 2). Lyrifissures iad located latero-anteriorly to genital aperture. Adanal setae ad 3 inserted latero-posteriorly to lyrifissures iad. Postanal porose area present, oval (24–28 × 8–12).

Legs. Morphology of leg segments, setae and solenidia typical for Galumnellidae (see Ermilov et al. 2011; Ermilov & Anichkin 2011a). Formulae 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 .

Material examined. The holotype (female) and paratype (female) have the following collection data: Ecuador, 0°25'8.04''S, 79°0'14.04''W, Reserva de Bosque Integral Otonga, near San Francisco de las Pampas, 2000-2200 m a.s.l., sifted litter, 7.11.1996, collected by Giovanni Onore.

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.

Etymology. The specific name “ lanceosensilla ” refers to the lanceolate sensilli.

Remarks. In having the smooth body surface Galumnopsis lanceosensilla sp. nov. is similar to group species ( G. clavata Mahunka, 1983 from Tanzania, G. giganteus Ermilov, Sidorchuk & Rybalov, 2011 from Ethiopia, G. longisetus Mahunka, 1986 (see Mahunka, 1986b) from Tanzania, G. ro s t ra t a Balogh, 1962 from Tanzania, G. ruginervis Balogh, 1962 from Tanzania, G. secunda ( Sellnick, 1923) from the Neotropical region, G. sellnicki Balogh, 1960 from the Ethiopian region). However, the new species is clearly distinguishable from all listed above species by the morphology of sensilli (lanceolate, with tooth in distal part in Galumnopsis lanceosensilla sp. nov. versus clavate in G. clavata , G. longisetus , G. ruginervis , G. s e c u n d a, G. sellnicki ; bacilliform in G. giganteus , G. rostrata ).

Figures

FIGURES 19 – 20. Galumnopsis lanceosensilla sp. nov., adult: 19 — dorsal view; 20 — ventral view, legs not shown. Scale bar 200 μm.

FIGURES 21 – 24. Galumnopsis lanceosensilla sp. nov., adult: 21 — sensillus; 22 — pteromorph; 23 — dorso-lateral view of prodorsum; 24 — posterior view. Scale bars (21) 20 μm, (22 – 24) 100 μm.