Graptoppia (Stenoppia) magallanesensis Ermilov 2019, sp. nov.

• Main Author: Ermilov, Sergey G.
• Format: Text
• Language: unknown
• Published: Zenodo 2019
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Arachnida; Sarcoptiformes; Oppiidae; Graptoppia; Graptoppia magallanesensis; Italica; Magallanes; Antártica
• Online Access: https://dx.doi.org/10.5281/zenodo.5681517; https://zenodo.org/record/5681517

Graptoppia ( Stenoppia ) magallanesensis sp. nov. (Figs 6, 7) Material examined. Holotype (female) and one paratype (male): Chile, Región de Magallanes y de la Antártica Chilena, Provincia de Magallanes, 30 km south-east of Punta Arenas, before Laguna Parrillar National Park, 53°23’00”S, 071°13’34”W, swamp, moss Sphagnum magellanicum , Berlese funnel extraction, 10.XI.2014 (V.A. Stolbov & S.A. Ivanov). Type deposition. The holotype is deposited in the collection of the Senckenberg Institute, Görlitz, Germany; one paratype is deposited in the collection of the Tyumen State University Museum of Zoology, Tyumen, Russia. All in ethanol with drop of glycerol. Diagnosis. Body size: 221–225 × 98–106. Rostrum rounded. Costulae present, short, their mediobasal parts not developed. Transcostula absent. Rostral, lamellar and interlamellar setae setiform, slightly barbed; ro longer than le and in . Bothridial setae long, unilaterally dilated and ciliate, rounded distally. Interbothridial region with two pairs of muscle sigillae and one pair of tubercles. Nine pairs of comparatively short, setiform, roughened notogastral setae and one pair ( c ) of minute, needle-like setae. Setae la inserted anterolateral to lm . Epimeral and anogenital setae short, setiform, roughened. Description. Measurements . Body length: 225 (holotype, female), 221 (one paratype, male); notogaster width: 98 (holotype), 106 (one paratype). Integument . Body color light brownish. Body surface microfoveolate (visible only under high magnification in dissected specimens, × 1000). Lateral parts of body between bothridia and acetabula I and II with small, not numerous granules (their diameter up to 1). Prodorsum (Figs 6 A, 6 C). Rostrum rounded. Costulae comparatively short, lineate, their mediobasal parts not developed. Transcostula absent. Rostral (20), lamellar (8) and interlamellar (8) setae setiform, slightly barbed; le located closer to in than to ro . Exobothridial setae (4) setiform, thin, smooth. Bothridial setae (24–28) with long stalk and shorter, unilaterally dilated and ciliate (with several short cilia), rounded distally head (they illusory seem globular in dorsal view). Interbothridial region with two pairs of muscle sigillae and one pair of tubercles (posterior to interlamellar setae). Postbothridial tubercles slightly developed. Longitudinal rows, comprising several muscle sigillae, present in front of the bothridia. Lateral semi-oval prodorsal carinae present. Notogaster (Figs 6 A, 6 C, 6 D). Anterior border convex medially. Ten pairs of notogastral setae present, c (4) needle-like, smooth, others (10–12) setiform, roughened, la inserted slightly anterolateral to lm . Notogastral lyrifissures ia , im , ip , ih and ips and opisthonotal gland openings well visible. Circumgastric scissure and circumgastric sigillar band distinct. Gnathosoma (Fig. 6 C). Subcapitulum longer than wide (57 × 41). Subcapitular setae (10) setiform, roughened. Adoral setae (4) setiform, thin, smooth. Palps (41) with setation 0-2-1-3-9(+1 solenidion). Postpalpal setae (2) spiniform, smooth. Chelicerae (57) with two setiform, barbed setae, cha (12–14) longer than chb (8). Trägårdh’s organ of chelicerae elongate triangular. Epimeral and lateral podosomal regions (Figs 6 B, 6 C). Sejugal tubercles absent. Epimeral borders IV present, semi-oval. Epimeral setal formula 3-1-3-3, setae setiform, roughened, 3c (8) longer than others (6). Lateral ridges between bothridia and acetabula III on lateral sides of body absent. Discidia triangular. Anogenital region (Figs 6 B–6 D). Four pairs of genital (4), one pair of aggenital (6–8), three pairs of adanal (8) and two pairs of anal (6–8) setae setiform, roughened. With three pairs of genital papillae. Adanal lyrifissures distinct, in paraanal position, close to anal aperture. Legs (Figs 7 A–7 D). Leg claws smooth. Porose areas on femora I–IV not observed. Formulas of leg setation and solenidia: I (1-5-2-4-20) [1-2-2], II (1-5-2-4-16) [1-1-2], III (2-3-1-3-15) [1-1-0], IV (1-2-2-3-12) [0-1-0]; homology of setae and solenidia indicated in Table 1. Setae p setiform on tarsi I, and very short, conical on tarsi II–IV. Famulus of tarsi I erect, swollen and blunted distally, inserted posterior to solenidion ω 1. Solenidia ω 1 on tarsi I, ω 1 and ω 2 on tarsi II, φ on tibiae III and σ on genua III bacilliform, ω 2 on tarsi I thickened, blunt-ended, other solenidia setiform. Etymology. The specific name magallanesensis refers to the Chilean Province, Provincia de Magallanes, where the new species was collected. Roman letters refer to normal setae, Greek letters refer to solenidia (except ɛ—famulus). One apostrophe ( ’ ) marks setae on anterior and double apostrophe ( ” ) setae on posterior side of the given leg segment. Parentheses refer to a pair of setae. *—ω 2 on tarsi II absent in K. lagunaensis sp. nov. Remarks. Graptoppia ( Stenoppia ) magallanesensis sp. nov. is morphologically most similar to Graptoppia ( Stenoppia ) italica (Bernini, 1973) from the Mediterranean (Bernini 1969, 1973) in having rounded rostrum and anterior notogastral margin, short costulae, ciliate bothridial setae and comparatively short notogastral setae, however, the new species differs from the latter by the absence of transcostula (versus transcostula present), localization of notogastral setae la anterolateral to lm (versus posterolateral), and the presence of tubercles in interbothridial region (versus tubercles absent). : Published as part of Ermilov, Sergey G., 2019, New species of oribatid mites of the family Oppiidae (Acari, Oribatida) from Chile, pp. 274-286 in Zootaxa 4656 (2) on pages 282-283, DOI: 10.11646/zootaxa.4656.2.4, http://zenodo.org/record/3368670 : {"references": ["Bernini, F. (1973) Notulae oribatologicae VII. Gli Oribatei (Acarida) dell'isolotto di Basiluzzo (Isole Eolie). Lavori Della Societa Italiana di Biogeografia, Nuova Serie, 3, 355 - 480. https: // doi. org / 10.21426 / B 6311060 8", "Bernini, F. (1969) Notulae Oribatologicae I. Contributo alla conoscenza degli Oribatei (Acarida) della Pineta dei S. Vitale (Ravenna). Redia, 51, 329 - 375."]}