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Acari: Oribatida: Damaeidae) 53-102 ©Staatl ZOBODAT - www.zobodat.at Zoologisch-Botanische Datenbank/Zoological-Botanical Database Digitale Literatur/Digital Literature Zeitschrift/Journal: Carolinea - Beiträge zur naturkundlichen Forschung in Südwestdeutschland Jahr/Year: 2016 Band/Volume: 74 Autor(en)/Author(s): Lamos Raymond A. Artikel/Article: Tokukobelba gen. nov. (Acari: Oribatida: Damaeidae) 53-102 ©Staatl. Mus. f. Naturkde Karlsruhe & Naturwiss. Ver. Karlsruhe e.V.; download unter www.zobodat.at Carolinea 74 (2016): 53-102, 18 Abb.; Karlsruhe, 15.12.2016 53 Tokukobelba gen. nov. (Acari: Oribatida: Damaeidae) RAYMOND A. LAMOS Abstract 1 Introduction Tokukobelba is proposed as a new genus in the ori- batid mite family Damaeidae BERLESE, 1896. The spe- Belba VON HEYDEN, 1826, is a genus within the cies Tokukobelba compta (KULCZYńSKI, 1902) comb. nov. is redescribed based on specimens collected in mite family Damaeidae BERLESE, 1896. The genus Heidelberg in Germany. The distinguishing traits of is rich in species and shows its greatest diversity Tokukobelba, which include the presence of prodorsal in the temperate to boreal regions of the Palae- apophyses Aa and Ap, the occurrence of only 2 setae arctic (KULCZYńSKI 1902a, MÄRKEL & MEYER 1960, on femur IV, and a solenidion coupled with the dorsal BULANOVA-ZACHVATKINA 1962, 1967, 1975, ENAMI seta d on the tibiae of legs I-IV are most unusual for a 1989, 1994, TOLSTIKOV 1996, TOLSTIKOV & LYASH- damaeid mite. The taxonomy and evolutionary system- CHEV 1996, WANG & NORTON 1995, BAYARTOGTOKH atics of the new genus are discussed. Evidence from 2000a, 2004a) although some Belba species comparative morphology suggests a basal position of Tokukobelba within its family. have also been recorded from the USA and Can- ada (BANKS 1904, NORTON 1977a, 1979b, 1979c, Kurzfassung MARSHALL et al. 1987, LINDO & WINCHESTER 2006), Tokukobelba gen. nov. from the volcano Popocatepetl in Mexico (NORTON (Acari: Oribatida: Damaeidae) & PALACIOS-VARGAS 1982) and from montane rain- Tokukobelba wird als neue Gattung der Oribatidenfami- forest in Costa Rica and Panama (SCHATZ 2006). lie Damaeidae BERLESE, 1896 vorgestellt. Basierend auf A concise review of the complex systematics of Fundmaterial aus Heidelberg wird die Art Tokukobelba Belba is presented by BAYARTOGTOKH (2000), who compta (KULCZYńSKI, 1902) comb. nov. neu beschrieben. contributed significantly towards furthering our Die kennzeichnenden Merkmale von Tokukobelba wie die Anwesenheit der prodorsalen Apophysen Aa und knowledge of the Damaeidae. More than 100 Ap, ein Femur IV mit nur 2 Borsten und ein Solenidion species have been combined with Belba during gekoppelt mit einer Dorsalborste d auf Tibiae I-IV sind the previous three centuries. A great number of sehr ungewöhnlich für eine damaeide Milbe. Die Taxo- these presently are synonyms of other species, nomie und evolutionäre Systematik der neuen Gattung reside in other genera, like Damaeus australis werden diskutiert. Die vergleichende Morphologie deu- (BANKS, 1895) (NORTON 1978a) and Kunstidamae­ tet auf eine basale Stellung von Tokukobelba innerhalb us lengersdorfi (WILLMANN, 1932) (MIKO 2006a), or der Damaeidae. are species inquirenda such as Belba bulbipeda­ ta PACKARD, 1887 (MICHAEL 1898), and Belba lon­ Author gipes BERLESE, 1884 (MAHUNKA & MAHUNKA-PAPP RAYMOND A. LAMOS, Rosenstr. 21, 68199 Mannheim, E-Mail: [email protected] 1995). BAYARTOGTOKH (2000, p. 298), building on BULANO- VA-ZACHVATKINA (1962, 1967, 1975) and NORTON (1979c), diagnosed Belba as follows: trochanteral Contents setation 1-1-2-1, rarely 1-1-2-2; genual setation 1 Introduction . 53 4-4-3-3, genual associated setal formula 1-1-1- 2 Material and methods . 54 0; tibial associated setal formula 0-1-1-1, one or 3 Proposal of a new genus: more rarely two pairs of prodorsal tubercles (Ba, Tokukobelba gen. nov. 55 Da) present in the dorsosejugal area or tubercles 4 Description of Tokukobelba compta absent, tubercle Bp mostly absent; propodola- specimens from Heidelberg . 61 teral apophysis P mostly absent; spinae adnatae 5 Taxonomy of Tokukobelba . 77 usually absent, very rarely present. It is apparent 6 Comparative morphology and evolu- that the genus lacks strong, convincing derived tionary systematics of Tokukobelba . 82 features and is primarily defined by traits which References . 93 have a high likelyhood of being plesiomorph for Abbreviations . 101 the Damaeidae (NORTON 1977a). ©Staatl. Mus. f. Naturkde Karlsruhe & Naturwiss. Ver. Karlsruhe e.V.; download unter www.zobodat.at 54 Carolinea 74 (2016) The heterogeneous species composition of structures are given in micrometers, with the Belba has been mentioned by several authors mean value followed by the range in parenthe- (NORTON 1979a, WANG & NORTON 1995), and the ses where based on a sample of 10 individu- polyphyly of the genus is likely. More than half a als. Adult setal length measurements are based century ago VAN DER HAMMEN and STRENZKE had on at least 3 specimens. Ventral body length is already noted that Belba compta (KULCZYńSKI, measured in lateral view from the tip of the ros- 1902) differs from Belba corynopus (HERMANN, trum to the posterior edge of the ventral plate. 1804) in epimeral setation and instead shows a Maximum notogastral width is determined in close resemblance to representatives of Meta­ dorsal view. Prodorsal width is measured from belba GRANDJEAN, 1936, in general appearance. the left margin to the right margin of the prot- They make special mention of the Metabelba-like erosoma at the level of the acetabulae in dorsal shape of the solenidion φ of tibia IV of this spe- perspective. Length of notogaster is measured cies, and suggest that “a detailed redescription from its anterior to its posterior margin. Noto- of B . compta might prove interesting, as there gastral thickness is determined in lateral view are also striking differences from B . corynopus from the ventral to the dorsal notogastral border. (HERMANN, 1804), the type of the genus Belba” Leg length is measured on whole legs in lateral (VAN DER HAMMEN & STRENZKE 1953, p. 152). In the aspect from the proximal margin of the trochant- present contribution, a morphologically highly er to the base of the claw. Length of single leg distinct, monophyletic group of species, which segments is determined in lateral view from the includes Belba compta, is removed from Belba most proximal sclerotized point to the most dis- and transferred to a new genus. tal and includes the part inserted in the follow- ing, more proximal segment. Distance between an adanal seta and the genital plate is meas- 2 Material and methods ured between the setal insertion point and the closest point on the border of the genital plate. The specimens of Tokukobelba compta (42 Distances between setae of prodorsum and of adults, 3 tritonymphs, 1 deutonymph, 2 proto- notogaster are determined between their cen- nymphs, 2 larvae) were collected by the author tral insertion points. An explanatory list of the on 6.9.2010 and 5.7.2012 on the Königstuhl hill abbreviations used in the text follows the list of near Heidelberg, Germany, from moist moss references. on rocks. Representatives of Belba coryno­ Leg setation formulae give the number of setae pus (20 adults, 4 tritonymphs, 2 deutonymphs, present on a specific segment of legs I-IV. Leg 1 protonymph) were obtained by the author on associated setal formulae refer to the presence 7.5.2009 in the Waldpark forest near Mannheim, (1) or absence (0) of setae paired with solenidia Germany, from moss on a decaying tree stump. on a specific segment of legs I-IV. Leg solenidial Ten adults of each species were deposited as formulae give the number of solenidia present voucher specimens in the acarology collection of on the genu, tibia and tarsus of a given leg. Pal- the Department of Zoology of the State Museum pal setation formulae give the number of setae of Natural History Karlsruhe in Germany. Various present on the palp in the sequence: trochanter- other oribatids from the author´s own collection femur-genu-tibia-tarsus. Epimeral setation for- and from that of the State Museum of Natural mulae show the number of setae present unilat- History Karlsruhe were studied for comparative erally on epimeres I-IV. purposes. Mites were fixed in ethanol, macerated The general morphological terms used in this pa- with lactic acid and observed under a light micro- per derive from BEHAN-PELLETIER & NORTON (1983, scope. Unmacerated and living specimens were 1985), and NORTON & BEHAN-PELLETIER (2009). also examined. Descriptions, measurements of The nomenclature of the epimeral enantiophys- structures, and illustrations are based on intact es largely follows GRANDJEAN (1960a) and NORTON or dissected specimens mounted in temporary (1978b), while that of the leg chaetotaxy is based cavity slides or on permanent slides. Unless spe- on NORTON (1977b). The term centroprodorsal cifically mentioned all descriptions refer to the groove is introduced and refers to the furrow situ- adult stage. ated anteriad the bothridia and posteriad the sig- The conventions of measurement used fol- illae of the cheliceral retractor muscles, between low BEHAN-PELLETIER & NORTON (1983, 1985) the prodorsal apophyses Aa and Ap where these and BAYARTOGTOKH (2000). Dimensions of body are present. ©Staatl. Mus. f. Naturkde Karlsruhe & Naturwiss. Ver. Karlsruhe e.V.; download unter www.zobodat.at LAMOS: Tokukobelba gen. nov. (Acari: Oribatida: Damaeidae) 55 3 Proposal of a new genus III and IV each with a single pair of ventral se- tae and a total 17 and 14 setae each; palptarsus Tokukobelba gen. nov. without subultimal seta sul and with ventral seta v2´. Nymphs of Tokukobelba differ from those of Type species: Belba mongolica BAYARTOGTOKH, other damaeids in having: prodorsum with a scle- 2000. rotized cerotegumental cap anteromediad the This species is described in: International Jour- bothridia; palptarsus without seta sul and with nal of Acarology 26(4), pp. 309-312, 316. seta v2´; distance between notogastral setae The holotype and a paratype of the type species c1-c2 = 0,3x c2-la; seta c3 elongate, measuring of Tokukobelba are located in the Acarology Col- 0,6 x body length.
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