Oribatid mites (Acari: Oribatida) from the Sella massif (Dolomites, Trentino, Italy) with description of Trichoribates valeriae n. sp. (Ceratozetidae) Heinrich Schatz To cite this version: Heinrich Schatz. Oribatid mites (Acari: Oribatida) from the Sella massif (Dolomites, Trentino, Italy) with description of Trichoribates valeriae n. sp. (Ceratozetidae). Acarologia, Acarologia, 2020, 60 (4), pp.842-862. 10.24349/acarologia/20204405. hal-03027491 HAL Id: hal-03027491 https://hal.archives-ouvertes.fr/hal-03027491 Submitted on 27 Nov 2020 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Distributed under a Creative Commons Attribution| 4.0 International License Acarologia A quarterly journal of acarology, since 1959 Publishing on all aspects of the Acari All information: http://www1.montpellier.inra.fr/CBGP/acarologia/ [email protected] Acarologia is proudly non-profit, with no page charges and free open access Please help us maintain this system by encouraging your institutes to subscribe to the print version of the journal and by sending us your high quality research on the Acari. Subscriptions: Year 2020 (Volume 60): 450 € http://www1.montpellier.inra.fr/CBGP/acarologia/subscribe.php Previous volumes (2010-2018): 250 € / year (4 issues) Acarologia, CBGP, CS 30016, 34988 MONTFERRIER-sur-LEZ Cedex, France ISSN 0044-586X (print), ISSN 2107-7207 (electronic) The digitalization of Acarologia papers prior to 2000 was supported by Agropolis Fondation under the reference ID 1500-024 through the « Investissements d’avenir » programme (Labex Agro: ANR-10-LABX-0001-01) Acarologia is under free license and distributed under the terms of the Creative Commons-BY-NC-ND which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original author and source are credited. Oribatid mites (Acari: Oribatida) from the Sella massif (Dolomites, Trentino, Italy) with description of Trichoribates valeriae n. sp. (Ceratozetidae) Heinrich Schatza a c/o Institute of Zoology, Technikerstrasse 25, A­6020 Innsbruck, Austria Original research ABSTRACT Results from collections of oribatid mites in the cushion plant belt of Sass Pordoi and Piz Boè in the Italian Dolomites (Prov. Trento) are presented. A total of 10 oribatid species belonging to seven families were found. Most have a wide general distribution, Anachipteria shtanchaevae is restricted to the Alps. Three species are frequently or mainly found in the montane to alpine zone (A. shtanchaevae, Camisia horrida, Oribatula interrupta). Remarkable findings are Camisia foveolata, hitherto only known from the boreal climate zone, which indicates a preglacial relict distribution, and Kunstidamaeus lengersdorfi as highest recorded altitude for this species. Trichoribates valeriae n. sp., found in large numbers on both mountains, is described and compared with other congeners, and its systematic position is discussed. This species is characterized by a lamellar structure with small ridges and widely separated cusps, rounded rostrum with nose­like protuberance, 10 pairs of medium long notogastral setae with short bristles, notogastral porose area A1 divided in two parts, porose areas present on all tibiae and tarsi. Additional morphological information on the presence of porose areas on tarsi of Trichoribates scilierensis Bayartogtokh and Schatz, 2008 is given. Keywords oribatid mites; faunistics; new records; high mountain region; preglacial relict; morphol- ogy; new species Zoobank http://zoobank.org/52425B43-57A2-40C7-A407-9425E7606898 Received 27 October 2020 Introduction Accepted 23 November 2020 The Sella group is a massif in the Dolomites, Northern Italy. The highest elevation is Piz Boè Published 27 November 2020 (3152 m a.s.l., Fig. 1A) at the intersection of South Tyrol, Trentino, and Veneto (Prov. Belluno). Corresponding author The Sass Pordoi (2950 m a.s.l., Fig. 1B), a plateau­shaped summit, is situated next to and west Heinrich Schatz: [email protected] of Piz Boè. Both mountains are very popular touristic destinations, a funicular from the Pordoi Pass reaches the summit of Sass Pordoi. The isolated mountain ranges are fossil coral reefs of Academic editor a Middle Triassic carbonate platform from the Raibl formation. It preserves fossils dating back Baumann, Julia to the Norian Middle Triassic sub­period during the Mesozoic Era (Reithofer 1928, Moroder 2008). Only small vegetation patches are scattered on karstic limestone. DOI During two excursions in 2017 soil and litter samples were taken on Sass Pordoi and the 10.24349/acarologia/20204405 Piz Boè massif. A commented list of the found oribatid mite species is presented, and a species ISSN 0044­586X (print) new to science is described. Results of sampling at the nearby Sella Pass on the edge of the ISSN 2107­7207 (electronic) Langkofel group (Gruppo di Sassolungo) are already published (Schatz 2017). Copyright Schatz H. Distributed under Creative Commons CC-BY 4.0 How to cite this article Schatz H. (2020), Oribatid mites (Acari: Oribatida) from the Sella massif (Dolomites, Trentino, Italy) with description of Trichoribates valeriae n. sp. (Ceratozetidae). Acarologia 60(4): 842­862; DOI 10.24349/ac­ arologia/20204405 Materials and methods Material examined Figure 1 The material was collected during two excursions of the author and Irene Schatz on Sass Pordoi (2932 – 2940 m a.s.l.) and Piz Boè (2980 – 3150 m a.s.l.). A total of 10 soil and litter samples (each ca. 10 x 10 cm, volume ca. 0,5 liter) were taken in vegetation patches within the cushion plant zone, keeping the environmental impact as low as possible. The samples were extracted for 12 days with moderate heating with light, preservation fluid was 75% ethanol. Morphological investigations were carried out in temporary slides in lactic acid. List of samples • TN 157: 20. June 2017: Sass Pordoi, near cable car station, water logged with snowmelt, wet moss cushion (46°30.218′N, 11°48.279′E, 2935 m a.s.l., Fig. 1B). • TN 159: 20. June 2017: Sass Pordoi, ibid., dry Cerastium uniflorum cushion from pre­ ceding year (46°30.218′N, 11°48.279′E, 2935 m a.s.l., Fig. 1F). • TN 160: 20. June 2017: Sass Pordoi, ibid., dry Cerastium uniflorum cushion from pre­ ceding year (46°30.218′N, 11°48.279′E, 2935 m a.s.l.). • TN 161: 20. June 2017: Sass Pordoi, ibid., moist moss cushion between rocks (46°30.059′N, 11°48.386′E, 2935 m a.s.l.). • TN 162: 19. July 2017: Piz Boè, southeast of summit, moist moss on rock (46°30.555′N, 11°49.697′E, 3149 m a.s.l., Fig. 1C). • TN 163: 19. July 2017: Piz Boè, ibid., moist Cerastium uniflorum cushion (46°30.555′N, 11°49.697′E, 3150 m a.s.l., Fig. 1D). • TN 164: 19. July 2017: Piz Boè, base of summit area, dry to moist Cerastium uniflorum cushion with humus and sand (46°30.383′N, 11°49.522′E, 2980 m a.s.l., Fig 1E). • TN 165: 19. July 2017: Piz Boè, ibid., dry to moist Saxifraga oppositifolia cushion with moss and humus (46°30.383′N, 11°49.522′E, 2980 m a.s.l., Fig. 1E). • TN 166: 19. July 2017: Sass Pordoi, near cable car station, below water logged (near TN157), moist to wet Carex grass cushion with humus (46°30.068′N, 11°48.455′E, 2932 m a.s.l., Fig. 1B). • TN 167: 19. July 2017: Sass Pordoi, ibid., 2940 m, dry to moist Cerastium uniflorum cushion with humus (46°30.059′N, 11°48.386′E, 2940 m a.s.l.). Identification Measurement of each parameter was done from the particular optimal parallax­free perspective. The total body length was measured in lateral view, from tip of the rostrum to the posterior edge of the notogaster, body width as maximal width of notogaster from dorsal view (without pteromorphs). Indicated are means, range in brackets. All measurements are given in micrometers (µm). The systematic arrangement follows Schatz et al. (2011), the terminology of morphological features that of F. Grandjean (summarized by Travé et al. 1996, Norton and Behan­Pelletier 2009), in the descriptive part of the Trichoribates species also that of Behan­Pelletier and Ermilov (2019). Following abbreviations are used: L—length, W—width, no—nose­like protuberance on rostrum, ro, le, il, bo, ex—rostral, lamellar, interlamellar, bothridial, exobothridial seta, tu—tutorium, gt—genal tooth, pt I, pt II—pedotectum I, II, Ad—dorsal porose area, Am, Schatz H. (2020), Acarologia 60(4): 842-862; DOI 10.24349/acarologia/20204405 843 Figure 1 Sampling locality of Trichoribates valeriae n. sp. (all fotos Irene Schatz, Figs 1A – 1E: 19. July 2017, Fig. 1F: 20. June 2017). A – Piz Boè (3152 m a.s.l.) from opposing Sass Pordoi. B – Vegetation patches on Sass Pordoi (samples TN 157 and TN 166 were taken in this area). C – Piz Boè, moss (sample TN 162). D – Piz Boè, Cerastium uniflorum with moss (sample TN 163). E – Boz Boè, Cerastium uniflorum and Saxifraga oppositifolia (samples TN 164, 165). F – Sass Pordoi, dry Cerastium uniflorum cushion from preceding year (sample TN 159). Schatz H. (2020), Acarologia 60(4): 842-862; DOI 10.24349/acarologia/20204405 844 Ah, Al—anterior dorsolateral porose areas, Dp—dorsophragma, Pp—pleurophragma, len— lenticulus, c1­3, d1­3, e1, e2, f1, f2, la, lm, lp, da, dm, dp, h1­3, p1­3—notogastral seta, Aa, A1, A2, A3—notogastral porose areas, ap—postanal porose area, ia, im, ih, ip, ips—notogastral lyrifissures, gla—opithonotal gland opening, opisthonotal gland region in immatures, cus— custodium, dis—discidium, cp—circumpedal carina, 1a­c, 2a, 3a­c, 4a­c—epimeral setae, ad1­3—adanal setae, po—preanal organ, iad—adanal lyrifissure, cha, chb— cheliceral setae, σ, φ, φ1, φ2, ω, ω1, ω2—solenidia on genu, tibia, tarsus, pa—porose area on leg, PY—pygidial sclerite, ho—humeral organ.