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Revisiting Lepidonella Yosii (Collembola: Paronellidae

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Revisiting Lepidonella Yosii (Collembola: Paronellidae Revisiting Lepidonella Yosii (Collembola: Paronellidae): character overview, checklist of world species and reassessment of Pseudoparonella doveri Carpenter Louis Deharveng, Sopark Jantarit, Anne Bedos To cite this version: Louis Deharveng, Sopark Jantarit, Anne Bedos. Revisiting Lepidonella Yosii (Collembola: Paronelli- dae): character overview, checklist of world species and reassessment of Pseudoparonella doveri Car- penter. Annales de la Société Entomologique de France, Taylor & Francis, 2018, 54 (5), pp.381-400. 10.1080/00379271.2018.1507687. hal-01957239 HAL Id: hal-01957239 https://hal.sorbonne-universite.fr/hal-01957239 Submitted on 17 Dec 2018 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. Revisiting Lepidonella Yosii (Collembola: Paronellidae): character overview, checklist of world species and reassessment of Pseudoparonella doveri Carpenter Louis Deharveng*a, Sopark Jantaritb & Anne Bedosa aInstitut de Systématique, Évolution, Biodiversité (ISYEB), Muséum national d’Histoire naturelle, CNRS, Sorbonne Universités, EPHE, CP 50, 57 rue Cuvier, 75005 Paris, France; bExcellence Center for Biodiversity of Peninsular Thailand, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand Summary. Characters used in the taxonomy of the genus Lepidonella Yosii, 1960 (Collembola: Paronellidae) are listed and discussed. Several new ones are introduced. An overview of pseudopore patterns across Collembola is presented, with several new locations of these structures across Entomobryomorpha. Their interest at different taxonomic level is under- lined. The genus Lepidonella is redefined. The American species L. marimuti Soto Adames & Bellini, 2015 is placed in incertae sedis among Lepidonella. Lepidonella species of the world are listed with synonymies and combinations. The Malaysian troglobitic species Pseudoparonella doveri Carpenter, 1933 is redescribed in detail, with emphasis on its pattern of antennal chaetae, and transferred to the genus Lepidonella. Its close similarity with L. lecongkieti Deharveng & Bedos, 1995 from southwestern Vietnam caves is underlined. This disjunct distribution is briefly discussed. Résumé. Revue du genre Lepidonella Yosii (Collembola : Paronellidae) : caractères, liste critique des espèces du monde et ré-assignation de Pseudoparonella doveri Carpenter. Les caractères utilisés dans la taxonomie du genre Lepidonella Yosii, 1960 (Collembola : Paronellidae) sont répertoriés et discutés. Plusieurs nouveaux caractères sont décrits. Une synthèse des patrons de distribution des pseudopores dans la classe des Collemboles est présentée, avec la mise en évidence de nouvelles localisations de ces structures au sein des Entomobryomorpha. Leur intérêt à différents niveaux taxonomiques est souligné. Le genre Lepidonella est redéfini. L’espèce américaine L. marimuti Soto Adames & Bellini, 2015 est placée en incertae sedis au sein du genre Lepidonella. Les espèces de Lepidonella du monde sont listées avec synonymies et combinaisons. L’espèce troglobie de Malaisie Pseudoparonella doveri Carpenter, 1933 est redécrite en détail, en insistant sur son patron de soies antennaires, et transférée dans le genre Lepidonella. Son étroite similarité avec L. lecongkieti Deharveng & Bedos, 1995 des grottes du sud-ouest du Vietnam est soulignée. Cette distribution disjointe est brièvement commentée. Keywords: Taxonomy; checklist; chaetal types; pseudopores; cave fauna Carpenter (1933) described a remarkable new species of reassess the taxonomic position of P. doveri in this con- Paronellidae from the Batu Caves in Selangor (Malaysia), text, which remains therefore uncertain. Pseudoparonella doveri, characterized in its original With the current acceleration of researches on cave description by elongate appendages and claws, and lack- Collembola in Southeast Asia, it is increasingly important ing eyes (in fact, it has 3 + 3 small eyes, see below). It was for biogeographic knowledge of the region to better place at that time the most troglomorphic species of springtails this species taxonomically, which remains the most tro- known from Southeast Asia. He assigned it to the genus glomorphic of Southeast Asia Collembola. We had the Pseudoparonella Handschin, 1925 on the basis of its short opportunity to examine a few specimens of bidentate mucro. Yoshii (1981, 1983) did not accept this Pseudoparonella doveri from the Batu Caves given by assignment, and considered the species as incertae sedis. Max Moseley and Liz Price, and a paralectotype of the Deharveng (1987, 1988) placed the species in species from the Natural History Museum (NHM) in Troglopedetes Absolon, 1907 following the redefinition London. Comparing our specimens to the original descrip- of the genus by Palacios-Vargas et al. (1985). Mitra tion of Paronella appendiculata (Schött, 1917), type spe- (1993, 2002) assigned P. doveri to the genus cies of the genus Pseudoparonella (Ellis & Bellinger Microparonella Carpenter, 1916, which he had redefined. 1973), led us to the conclusion that “Pseudoparonella Microparonella was shown to be a synonym of doveri” is not a member of the genus Pseudoparonella, Troglopedetes to which its type species clearly belongs in agreement with the authors cited above. The species is (Deharveng & Bedos 1995), but these authors did not neither a Troglopedetes as currently understood, as its *Corresponding author. Email: [email protected] fourth antennal segment is not subdivided. Its inclusion in dorsal chaetotaxy, we rely (but see below) on the nomencla- the genus Microparonella has to be abandoned as the tures of Szeptycki (1979), Mitra (1993) and Soto-Adames & genus was found to be based on a species of Bellini (2015). We used most characters listed in Soto-Adames et al. (2014), with some additional ones. The formula of dorsal Troglopedetes (Deharveng & Bedos 1995). The short macrochaetae and trichobothria are given by half-tergite from mucro and presence of only two trichobothria on Abd. head to Abd. IV; mac along peri-antennal area, anterior rows IV exclude doveri from Cyphoderopsis Carpenter, 1917 or of mac on Th. II, lateral mac of Abd. IV and mac of Abd. V– Trogolaphysa Mills, 1938 as well (Thibaud & Najt 1988; VI are not included in the formula. S-chaetae formulae are Jantarit et al. 2013; Soto-Adames et al. 2014). Conversely, given separately for ms and for s, by half-tergite from Th. II to fi Abd. V. it matches the most recent de nition of the genus Most chaetae had fallen during clearing and mounting pro- Lepidonella Yosii, 1960 (Deharveng & Bedos 1995; cesses. Sockets of scales can often be distinguished from those of Soto-Adames & Bellini 2015; Bellini & Cipola 2017), chaetae on slide specimens of Entomobryoidea, but this was not except for its reduced eye number, a well-known adaptive that easy on the few available specimens of L. doveri, and we character among cave-obligate species. were not able to reconstruct reliably the dorsal chaetotaxic pat- tern of mesochaetae as thoroughly analyzed by Soto-Adames & In this paper, several new or rarely used taxonomical Bellini (2015). characters are introduced for the taxonomy of Lepidonella and Paronellidae. The genus Lepidonella is rediagnosed, and a list of its species is given. Pseudoparonella doveri is Results transferred to the genus Lepidonella, and redescribed in Morphological characters detail. Its affinities with L. lecongkieti Deharveng & Bedos, 1995 from southern Vietnam are emphasized. Below we list and comment on some important morpho- logical characters for the taxonomy of Lepidonella. Several are newly introduced characters, and a few are overlooked features drawn from various papers of Yoshii Material and methods (mostly, 1981, 1982). The examined specimens include a slide of a paralectotype borrowed from the London NHM and six specimens collected in the Batu Caves by Max Moseley and Liz Price. These last specimens in alcohol were examined and photographed under Pseudopores a Leica (Wetzlar, Germany) MZ16 stereomicroscope, then Figure 2. Pseudopores were first discovered by Gisin mountedonslidesinMarcAndreIIafterclearinginlactic (1963) on tergites and coxae I and II of Entomobryidae, acid. Morphological characters were observed and drawn using a Leica DMLB microscope with Differential then distally on manubrium (Gisin 1964). Later on, they Interference Contrast (DIC). Photographs were taken with a were observed in other locations in Isotomidae Jenoptik (Jena, Germany) ProgRes C10+ camera mounted on (Deharveng 1979), Poduromorpha (Deharveng 1983), the microscope. Figures including photos were improved with Entomobryidae (Lukic et al. 2015) and Tomoceridae (Yu Photoshop Elements v9 (Adobe Inc., San José, USA). et al. 2014). In fact, they are also present in other locations not mentioned in the literature, as listed below for Abbreviations used in the descriptions Lepidonella doveri: Abd. = abdominal segment; Ant. = antennal segment; mac = macrochaeta; mes = mesochaeta; mic = microchaeta; ms (1) Apically on antennal segments II and III, prob- or s-microchaeta
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