Zootaxa · September 2006 DOI: 10.5281/Zenodo.174005
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See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/290928494 New Mites Of The Genus Holoparasitus Oudemans, 1936 From Northern Austria And Karavanke (Acari: Parasitidae) Article in Zootaxa · September 2006 DOI: 10.5281/zenodo.174005 CITATIONS READS 4 155 1 author: Wojciech Witaliński Jagiellonian University 65 PUBLICATIONS 1,058 CITATIONS SEE PROFILE All content following this page was uploaded by Wojciech Witaliński on 14 December 2016. The user has requested enhancement of the downloaded file. Zootaxa 1320: 15–27 (2006) ISSN 1175-5326 (print edition) www.mapress.com/zootaxa/ ZOOTAXA 1320 Copyright © 2006 Magnolia Press ISSN 1175-5334 (online edition) New mites of the genus Holoparasitus Oudemans, 1936 from northern Austria and Karavanke (Acari: Parasitidae) WOJCIECH WITALIÑSKI Institute of Zoology, Jagiellonian University, R. Ingardena 6, PL-30 060 Kraków, Poland. E-mail: [email protected] Abstract A new mite species, Holoparasitus rhombogynialis sp. nov. (Acari: Parasitidae) is described from Karavanke (Slovenia-Austria border). H. hemisphaericus (Vitzthum, 1923) is redescribed, including a description of the previously unknown male from the type locality in northern Austria. Both species are considered to be members of the Holoparasitus hemisphaericus species-group, which is newly defined. Ologamasus absoloni Willmann, 1940 is synonymised with H. hemisphaericus, and the female of H. intermedius (Holzmann) sensu Micherdziński is synonymised with H. cornutus Juvara-Bals & Witaliński. Key words: Acari, Parasitidae, Holoparasitus, new species, new synonyms, redescription, mite taxonomy, Karavanke Introduction A well known problem with early taxonomic descriptions is that many "known" species are difficult or even impossible to identify without close examination of the type material. Sometimes, as in the case of Holoparasitus hemisphaericus (Vitzthum, 1923), the description and drawings are misleading. According to the original description based on a single female (Vitzthum, 1923), the key character of the species is a prominent spur on the distal margin of trochanter IV. As mentioned in an earlier paper (Witaliński & Skorupski, 2002), we examined this type specimen and concluded that H. micherdzinskii Witaliński, 1981 is a junior synonym of H. hemisphaericus (Vitzthum). Further, it was found that the peculiar spur on Tr IV was an artefactual interpretation of the normal cuticle of the segment when observed from the side. Therefore, attempts at finding this character and identifying H. hemisphaericus have been unsuccessful. Fortunately, new material collected from the type locality of the species (Waidhofen a.d. Thaya, Austria) made it possible to examine and describe both sexes. It has also become clear that a new, Accepted by B. Halliday: 21 Aug. 2006; published: 25 Sept. 2006 15 ZOOTAXA undescribed species from the Karavanke mountains, morphologically very similar to H. 1320 hemisphaericus, justifies the formation of a new Holoparasitus hemisphaericus species- group, containing H. hemisphaericus and H. rhombogynialis sp. nov. Holoparasitus hemisphaericus species-group Only the specific characters of the new species group are given. For other morphological features of the genus Holoparasitus and its different species groups (annulus, caesus, calcaratus, mallorcae, peraltus) see Juvara-Bals (1975), Hyatt (1987), Juvara-Bals & Witaliński (2000), Witaliński & Skorupski (2002, 2003), Juvara-Bals & Witaliński (2006). Diagnosis of the species group In both sexes gland pores gv1 are present and pores gv2 are located in unmodified cuticle; gnathotectum is of the trispinate-type. Female. Presternal plate wide, narrowed medially, its anterior margin smooth, lateral platelets free and narrow; sternal shield in one piece; posterior paragynial lobes distant; metagynial sclerites semicircular; posterolateral protrusions “locking” epigynial plate minute or absent; thickening of the underside of anterior paragynial edge facing coxa III absent; central apex of epigynial shield less pigmented and right-angled, lateral prongs large and acute; epigynial subapical structure well pigmented, broad and barrel-shaped in outline; lateral protrusions bipartite, comprised of small, semicircular and well sclerotised posterior structures passing anteriad into less sclerotised hyaline projections; endogynium cup-shaped, with spines gathered in two lateral (left and right) groups, posterior endogynial margin forms two broad, partially overlapping lamellae, elliptical or leaf- shaped, partly covering the endogynial opening; distinct broad endogynial lamella covers posterior part of endogynium ventrally. Male. Sternum with large excipulum open on both ends and formed by three parallel, longitudinally oriented thickenings, accompanied by two additional anterolateral ones (left and right); central part of hypostome regularly triangular and moderately sclerotised; corniculi slender or extended in proximal half; fixed cheliceral digit straight and slender with many tiny denticles followed by lamellar edge, movable digit with large tooth proximally and 4–5 smaller teeth distally; hypostomatic setae on a separate piece of cuticle. Remarks The proposed species group is most similar to the peraltus species-group (Witaliński & Skorupski, 2003). The best diagnostic characters differentiating both groups are as follows: in females, the epigynial subapical structure possesses an inverted T-shaped thickening (peraltus group) or this structure is absent (hemisphaericus group); in males, the excipulum is hoof-shaped and corniculi are not on a separate piece of cuticle (peraltus 16 © 2006 Magnolia Press WITALIŃSKI group), or the excipulum is “open” at both anterior and posterior ends and flanked by two ZOOTAXA very prominent lines of sternum reticulation running parallel to the anterolateral margins 1320 of the excipulum, and hypostomatic setae are on a separate piece of cuticle (hemisphaericus group). In the following diagnoses specific features complementary to species-group characters are included. Holoparasitus hemisphaericus (Vitzthum, 1923) (Figs. 1–21) Ologamasus hemisphaericus Vitzthum, 1923: 101. Holoparasitus absoloni (Willmann, 1940) female, (as Ologamasus absoloni Willmann, 1940: 212), syn. nov. Holoparasitus micherdzinskii Witaliński, 1981: 41, synonymy by Witaliński & Skorupski, 2002: 55. Material examined Material deposited in the Zoologische Staatssammlung, München: holotype female, slide "V15", left-hand labelled "Ologamasus hemisphaericus Vitz. 1923 & Hypost. Palpi Chel. B. 1 TYPUS" and right-hand labelled "Waidhofen/Thaya, N.-Öst. Muttergang v. Hylesinus fraxini Panz. leg: Wichmann det: Vitzthum", and slide "V22", left-hand labelled "Ologamasus hemisphaericus Vitzth. & TYPUS" and right-hand labelled "Waidhofen, Thaja leg: Wichmann det: Vitzth. 25. 6. 1920", as well as female, slide originally labelled "13", right-hand "Olog. absoloni & Det. C. Willmann" and left-hand "Abs. 775", and additionally labelled as follows "Ologamasus absoloni WILLMANN, 1940 = Holoparasitus absoloni (WILLMANN, 1940)" " rev.: I. Juvara Bals, 1999" "1 f; Holotypus". Material collected by the author and deposited in the Zoological Museum, Jagiellonian University, Cracow: 22 females, 12 males (slides no. 1881–1890), 12.11.2004; Waidhofen a.d. Thaya, Austria, thick layer of moss under group of larches in spruce forest; 48 o 49.18' N, 015o 21.50' E, alt. ca. 650 m a.s.l. Diagnosis In the female, the endogynium is circular or oval in outline, with two lateral protrusions each bearing several spines directed adaxially and more or less anteriad; two lamellae protruding from the posterior margin of endogynium elliptical, covering most of the endogynial entrance; anterior margin of endogynial lamella convex; epigynial central prong right-angled and evenly but weakly pigmented; subapical epigynial structure with bipartite lateral protrusions, these located posteriorly, semicircular and not extending beyond epigynial margin, anterior protrusions hyaline, extending out of the epigynial margin. In the male, sternal shield with prominent excipulum composed of three parallel thickenings with two depressions in-between and two additional anterolateral thickenings HOLOPARASITUS © 2006 Magnolia Press 17 ZOOTAXA of sternal reticulation frequently forming an arc delimiting the excipulum anteriorly; 1320 cuticle of excipulum with well visible large pores forming a polygonal network; corniculi slender; spurs on Ge II and Ti II with concave margin, similar in shape, size and location. Description Female Idiosoma well sclerotised, brownish, 520–570 x 685–755 µm (n=10). Length of podonotal setae: 33–37 µm (j1), 28–32 µm (r3), others 10–37 µm; opisthonotal setae very short, 6–8 µm; length of peritrematal groove 215–220 µm. Venter. Presternal plate wide, narrower medially, lateral platelets wedge-shaped and free (Fig. 1). Sternal reticulation (Figs 1, 2) more pronounced in an area demarcated posteriorly by a line running through the second pair of pores (iv2). Gland pores gv1 present adaxially to setae st3. Setae of sternogenital region finely barbed, 50 µm (st1) to 65 µm (st2, st3) long. Genital region. Paragynial shield (Fig. 2) with posterior paragynial lobes relatively small and far from one another; metagynial sclerite semicircular; posterolateral protrusion “locking” epigynial plate minute, thickening of the underside of anterior paragynial edge facing coxa III absent. Central apex of epigynial shield (Figs. 3, 4) less pigmented and