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Protura: Acerentomidae Sl Eur. J. Entorno?. 98: 249-255, 2001 ISSN 1210-5759 Vindobonella leopoldina gen. n., sp. n. from Austria (Protura: Acerentomidae s. 1.) An drzej SZEPTYCKI1 and E rhard CHRISTIAN2 1 Institute of Systematics and Evolution ofAnimals ofthe Polish Academy of Sciences, ul. Slawkowska 17,31016 Kraków, Poland; e-mail: [email protected] 2 Institute ofZoology, University ofAgricultural Sciences, Gregor-Mendel-StraBe 33, A-1180 Wien, Austria; e-mail: [email protected] Key words. Protura, Acerentomidae, new genus, new species, taxonomy, Central Europe Abstract. A new genus, Vindobonella gen. n. (Acerentomidae s. l.), and a new species, Vindobonella leopoldina sp. n., are described from Vienna. The new genus belongs to a group characterized by a reduced labial palp and a non-modified striate band on abdominal segment VIII. INTRODUCTION microchaeta (cf. Bernard, 1990). Poresl present on meso- An investigation of the soil fauna of the city of Viennaand metanotum, al on mesonotum only. Prosternum with seta A2. revealed two new proturan species of the family Eosento- midae (Szeptycki & Christian, 2000). The new aceren- Foretarsal sensillumb' present, tl claviform,t2 thick tomid species described in the present paper is placed in a and pointed (not filiform and thin as in most Acerentomi­ dae), t3 cylindrical. Sensillum d inserted proximad to new genus: level of insertion oft2, much nearer toc than to e. Vindobonella gen. n. Seta P3 on abdominal terga II-VI anterior to line Type species: Vindobonella leopoldina sp. n., by P2-P4. Seta P2a on urotergite I is a gemmate original designation. microchaeta,A5 on urotergite I and all accessory setae on abdominal segments II-VII are thin, linear microchaetae. Etymology: The genus name (female gender) is derivedAbdominal legs with 4, 2, and 2 setae, respectively, from Vindobona (lat.) = Vienna, the species name refers subapical seta on legs II and III more than twice length of to the type locality Leopoldsberg. apical seta. Urosternite II with seta Pla. Porepsm present on the urotergites I-VIII,psl on VI and VII,al on II-VII. Diagnosis (characters arranged according to their sup­ Sternal porotaxyAcerentulus of type: medial pore only on posed systematic significance): A genus of the family urosternite VII. Striate band on abdominal segment VIII Acerentomidae s.l. ( = sensu Tuxen, 1964). Meso- and well developed, normal. Hind margin of comb VIII metanotum with 4 anterior setae. SetaP3 on urotergites straight. Urosternite VIII with 4 setae in one row, setala II-VI anterior to lineP2-P4. Abdominal legs II and III absent. Urotergite X with setala present, set of setae on with 2 setae. Striate band on abdominal segment VIII nor­ urotergites IX and X identical. Urosternite XI with 4 mal. Labial palp without tuft. SetaP2a on meso- and setae. Hind margin of segments IX-XI and of the telson metanotum nearer toP3 than toP2. Calyx of filamento di smooth. A single dorsal pore on the dorsal lobe of the tel­ sostegno ovoid, smooth. Foretarsus with sensillum b', son. Female squama genitalis ofAcerentulus type, sensillum d nearer toc than to e, tl claviform (cf. Rusek, acrostyli situated subapically. 1974),t2 spindle-like, t3 cylindrical. Head with postpseu- docular seta. Dorsal lobe of telson with a single pore.Affinities: Vindobonella gen. n. belongs to a group of Urosternite VIII with four setae. Habitus similar toacerentomid genera with a well developed (normal) Gracilentulus species. striate band on abdominal segment VIII and a reduced labial palp without terminal tuft. In the structure of the Description: Head without differentiated sensory setae. foretarsus (the shape of sensillum b, the position of sen- Postpseudocular seta present. Labial palp reduced, with silla, the relatively long empodial appendage), in the pres­ three setae and a long, thick, more or less parallel-sided ence of four setae on urosternite XI and in the short sensillum. Filamento di sostegno with smooth, ovatefemale squama genitalis the new genus is most similar to calyx and long, simple posterior filament. PseudoculusTuxenidia Nosek & Cvijovic, 1969 Podolinellaand Szep- round, with short lever. tycki, 1995 (Nosek & Cvijovic, 1969; Szeptycki, 1995). Meso- and metanotum with two anterior setae(A2 and Vindobonella differs from both these genera in the pecu­ A4), seta P2a nearer toP3 than toP2. Setae Pla and P2a liar, thick and pointed sensillum t2 (“spindle-like”, cf. on meso- and metanotum as gemmate microchaetae, setaTuxen, 1964). FromPodolinella it differs in the presence P5 as a small pit; metanotal seta P4a as a thin, linear 249 Table 1. Body measurements (jam) ofVindobonella leopoldina gen. n., sp. n. imago preimago mat.jun. larva II head 98-112 93 85-92 94 pseudoculus 5-7 5 5 5 filamento di sostegno 18-22 19 17-19 14 PI on mesonotum 14-15 14 11-13 11 P2 on mesonotum 19-22 18 15-18 14 foretarsus 68-71 61 53-58 48 claw 19-29 16 14-17 15 empodial appendage 6-7 5 5-6 4 max body length 960 ? 780 ? nr of specimens 5 1 3 1 of a postpseudocular setaon the head, the uniformly Not includedin the type material: 1 preimago and 3 shaped head setae, the cylindrical sensillum t3 (in Podoli- maturi juniores (collected with holotype), and 1 larva II nella it is “leaf-like”), and in the structure of the reduced (same locality, leg. E. Christian, 11 05 1987). labial palp (with a long apical seta - probably a rudiment of the terminal tuft - in Vindobonella, versus a small Location of type material: In the collection of the Insti­ conical structure in Podolinella). It differs from tute of Systematics and Evolution of Animals of the Tuxenidia in the structure of the striate band (normal in Polish Academy of Sciences, Krakow, except paratypes Vindobonella, highly modified inTuxenidia), the number 6183 and 6187 and 2 maturi juniores at the Naturhistori­ of setae on urosternite VIII (4 versus 6), and the numbersches Museum Wien. All specimens are mounted in Marc of setae on abdominal legs II and III (2 versus 1). André II medium. The thick, spindle-like sensillum t2 was only previously Description (Figs 1-26): Body measurements are given recorded in the genus Delamarentulus Tuxen, 1963 in Table 1. Head setae short, slightly diversified in length (Tuxen, 1964, 1979). Since this genus differs fromVindo­ but not in shape. Additional and postpseudocular setae bonella in many important characters (e.g., shape of fila­ present. Rostrum short. Pseudoculus round, with short mento di sostegno, position of phanerae on the foretarsus,lever, PR 14-20. Filamento di sostegno short, with position ofP3 on abdominal terga), they are not likely tosmooth, ovate calyx, long posterior filament and bilobate be closely related. Vindobonella shares the differentiation posterior dilation, CF 4.9-6.1. Maxillary palps short, of accessory setae (gemmate microchaetae on nota and onthick; sensilla equal, short, thin and pointed. Labial palps urotergite I, linear microchaetae on abdominal segmentswithout terminal tuft, with three setae and one long, thick, II-VII) with some other genera. Data on this feature aremore or less parallel-sided sensillum. scarce, but a very similar differentiation has been Main setae on nota long, slightly differentiated, setaeM observed in Acerentulus Berlese, 1908 (Szeptycki, 1991), and A2 short, thin, hair-like. Setae Pla and P2a are gem­ Podolinella ( of Szeptycki, 1995),Najtentulus Szeptycki mate microchaetae; P5 a small sensillum. P4a on & Weiner, 1997, and (at least in some species of)Keny- metanotum a thin, linear microchaeta. Length ratioPl of : entulus Tuxen, 1981 (Nakamura, 1997),Australentulus P2 on mesonotum 1 : 1.3-1.5. SetaA2 on thoracic sterna Tuxen, 1967 (Imadaté, 1989), and Far Eastern species of and M2 on prosternum of same shape P4aas on metano­ Gracilentulus Tuxen, 1963 (Nakamura, 1995b). On the tum, but shorter. Thoracal sterna without pores. other hand, in some species ofBaculentulus Tuxen, 1977 Foretarsal sensillumb' present; tl claviform;t2 long (Nakamura, 1995a) and in European species ofGracilen­ and thick, pointed (spindle-like); t3 short, cylindrical, api­ tulus ( of Szeptycki, 1993) the accessory setae on the notacally rounded;d proximal to level of insertiont2, ofmuch and on the abdominal segments are of equal shape. nearer to c than to e. External sensillum a of medium Vindobonella leopoldina sp. nov. length, reaching base of y3; b extremely long, reaching Holotype: female (coll. nr 6177). Austria, Vienna, Leo­base of claw; c subequal to a;d shorter than c, reaching poldsberg, steep southwest slope (16°21.09'E/ base off. Internal sensillum a' situated on level oftl, long 48°16.58'N, 390 m a.s.l.), xerothermicQuercus pubes- and thin, parallel-sided, reaching base of b'; b' and c' cens stand, pararendzina over platy marl, leg. E. equal, long and thin, nearly seta-like. All exterior and Christian, 21 08 1999. interior sensilla, with exception of b, thin, parallel-sided. Proximal pore proximal to level of insertion of sensillum Paratypes: 2 females (6183, 6186) and 2 males (6187, c. Setae ¡31 and 84 short, equal; the latter situated 6188), collected with holotype. proximal to base of c'. Relative length of foretarsal sen­ silla: tl < t3 < g < a' = b' = c' < t2 = d =f < a = c = e << b. 250 Claw without inner tooth; empodial appendage relativelyurotergite VII visible only on the lateral part of the long. BS about 0.5, TR 2.3-3.8; EU 0.3-0.4. tergite. Trunk chaetotaxy as in Table 2. Urotergite I without Abdominal legs with 4, 2, and 2 setae, respectively; Pla; P2a of same shape asPla on nota;A5 as a short and apical seta on legs II and III less than half the length of thin linear microchaeta. Urotergites II-VI without setaesubapical seta. Accessory setae on urosternites I-VII of Pla and P3a; accessory setae are short and thin linear the same shape as on tergites, but shorter.
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