Museum dhistoire naturelle de la Ville de Geneva

Genève, Switzerland

Museum dhistoire naturelle de la Ville de Geneva

Genève, Switzerland
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Kemp A.,Griffith University | Cavin L.,Museum dhistoire naturelle de la Ville de Geneva | Guinot G.,Montpellier University
Palaeogeography, Palaeoclimatology, Palaeoecology | Year: 2017

Several attempts to include post-Devonian lungfish in phylogenies of dipnoans have been made, but are hampered by the poor preservation of most Mesozoic and Cenozoic lungfish, and by the paucity of the occurrences of these taxa. This contribution has made use of the few post-Devonian fossils that are known from cranial, dental and post-cranial remains, to compare them with Devonian material and with living lungfish. Characters have been chosen to cover the best preserved structures of the Mesozoic and Cenozoic fossils, and the resulting phylogeny has been discussed in relation to previous analyses. The post-Devonian phylogeny has been anchored to a published phylogeny of Devonian taxa and a phylogenetic diversity curve has been computed. Based on this phylogeny rates of origination and extinction have been calculated, and environmental transfers and trends in body size changes have been detected. Our analyses show that the Permian gnathorhizodontids and the extant lepidosirenids are closely related, that lungfishes have experienced two phases of taxic diversification, a marine one in the Devonian and a freshwater one in the Permian. Major negative size shifts occurred during the marine phase and major positive size shifts occurred during the freshwater phase. A new classification of post-Devonian dipnoan families is also presented. © 2017 Elsevier B.V.

Deesri U.,Mahasarakham University | Jintasakul P.,Nakhon Ratchasima Rajabhat University | Cavin L.,Museum dHistoire naturelle de la Ville de Geneva
Journal of Vertebrate Paleontology | Year: 2016

A new ginglymodian fish, Khoratichthys gibbus, gen. et sp. nov., is described based on the impression of a single articulated fish preserved on a sandstone slab from the Late Jurassic–Early Cretaceous Phu Kradung Formation, northeastern Thailand. Khoratichthys gibbus is characterized by a distinct humpbacked body with elongate posterior spines on the dorsal ridge scales; the cheek is completely covered by bone; it has few infraorbitals, the elongate anterior-most one shows a tiny contact with the orbit, and six suborbitals arranged in one row; the opercule is rectancular in shape; the preopercule is narrow and regularly curved; and the interopercule large. A cladistic analysis including the type species of 25 ginglymodian genera indicates that Khoratichthys is the basal-most Lepisosteiformes, in an unresolved position with Neosemionotus and Lophionotus. This taxon provides a new evidence of the high diversity of ginglymodian fishes in the Phu Kradung Formation. A high taxic diversity of ginglymodians in Middle Jurassic–Early Cretaceous of southern Asian (excluding India) freshwater environments is observed, indicating that this clade occupied a major position in freshwater fish assemblages. SUPPLEMENTAL DATA—Supplemental materials are available for this article for free at Citation for this article: Deesri, U., P. Jintasakul, and L. Cavin. 2016. A new Ginglymodi (Actinopterygii, Holostei) from the Late Jurassic–Early Cretaceous of Thailand, with comments on the early diversification of Lepisosteiformes in Southeast Asia. Journal of Vertebrate Paleontology. DOI: 10.1080/02724634.2016.1225747. 2016 © by the Society of Vertebrate Paleontology

Schweninger P.J.,Museum dhistoire naturelle de la Ville de Geneva | Kosulic O.,Mendel University in Brno
Revue Suisse de Zoologie | Year: 2015

Two new species of paculline spiders are described on the basis of males and females: Perania annam sp. nov. from southern Vietnam and Lamania bokor sp. nov. from southern Cambodia. Both of them occur distinctly outside the previously known geographical range of each respective genus. The relationships of these species are discussed and morphological variation is illustrated. Lamania kraui (Shear, 1978), the closest known relative of L. bokor sp. nov., is re-defined on the basis of the types and of newly collected specimens from Peninsular Malaysia and Thailand. Vulva morphology in Lamania and scopulae in males of Tetrablemmidae are discussed.

Mahnert V.,Museum dHistoire Naturelle de la Ville de Geneva | Sharaf M.,King Saud University | Aldawood A.S.,King Saud University
Zootaxa | Year: 2014

Five species of pseudoscorpions are recorded from the southwestern mountains of the Kingdom of Saudi Arabia. Pseudochthonius arabicus Mahnert n. sp. is described as new to science; this genus was previously known only from sub- Saharan Africa and tropical South America and represents the first record of the family Chthoniidae from the Arabian Peninsula. Paratemnoides ellingseni (Beier, 1932), a widespread species in tropical Africa, and Withius piger (Simon, 1878) are added to the faunal list of Saudi Arabia. Minniza monticola Mahnert, 1991 and Rhacochelifer sonyae Mahnert, 1991 are apparently endemic to the southwestern mountains of Saudi Arabia. © 2014 Magnolia Press.

Additional specimens or Chthonius (Ephippiochthonius) schmalfussi Schawaller, 1990 (Chthoniidae) and Hadoblothrus aegaeus Beron, 1985 (Syarinidae) are recorded from the caves Zoodochos I and II (type localities) near Kamari. Variability of morphometric and morphological characters is given for both species, H. aegaeus is redescribed. Allochernes powelli (Kew, 1916) (Chernetidae) is recorded for the first time from caves on Santorin.

Schwendinger P.J.,Museum dhistoire naturelle de la Ville de Geneva
Zootaxa | Year: 2013

Two mesothelid trapdoor spider species, Liphistius isan Schwendinger, 1998 and L. laoticus sp. n., are reported from southern Laos, east of the Mekong River. Liphistius isan was previously known only from the type locality in northeastern Thailand, and it is here also reported from a second Thai locality. Liphistius laoticus sp. n. is newly described from males and females. The two species belong to distinct lineages and they both have their closest relatives in northeastern Thailand. Information on biology and relationships of these two species is given. Copyright © 2013 Magnolia Press.

Schwendinger P.J.,Museum dHistoire Naturelle de la Ville de Geneva | Hirotsugu O.N.O.,National Museum of Nature and Science
Revue Suisse de Zoologie | Year: 2011

Songthela australis Ono, 2002 is re-defined on the basis of new material from the type locality and from a second locality nearby. The male of this species is described for the first time. A closely related species, Heptathela nui sp. n., is described from males and females collected at two other localities in the same province. Variation in the copulatory organs of both species is illustrated and notes are given on their biology, particularly on their association with an ectoparasitic mite species of the genus Ljunghia Oudemans, 1932. "Twig-lining" is reported for one population of H, nui sp. n. Songthela australis and H. nui sp. n. are compared with Nanthela tonkinensis (Bristowe in Bristowe & Millot, 1933) and H. tomokunii Ono, 1997a from northern Vietnam, with H kimurai (Kishida, 1920), H kikuyai Ono, 1998, Ryuthela owadai Ono, 1997b and R. nishihirai (Haupt, 1979) from Japan, and with Liphistius ornatus Ono & Schwcndinger, 1990 and L. thaleri Schwendinger, 2009 from Thailand. Additional taxonomie characters are illustrated for most of these species. Judging from apomorphies in the male copulatory organs, S. australis and H. nui sp. n. are sister species, but their female copulatory organs are very different. This challenges the generic concepts of Songthela Ono, 2000 and Abcathela Ono, 2000 (the latter earlier placed in the synonymy of Heptathela). The genus Nanthela Haupt, 2003 has no clear apomorphies, and transitions of diagnostic characters between Nanthela, Songthela and Heptathela were found. Thus Nanthela and Songthela are here placed in the synonymy of Heptathela. Morphology and conflicting terminology of copulatory organs in Liphis tiidae, and the current confusion in Heptathelinae systematics are discussed. The copulatory organs of males and females of Liphistius Schiödte, 1849 and Ryuthela Haupt, 1983 are here considered as more derived than those of Heptathela. Some observations on moulting of liphistiid spiders are given.

Cavin L.,Museum dhistoire naturelle de la Ville de Geneva | Kemp A.,Griffith University
Biological Conservation | Year: 2011

The recognition of phylogenetic information for evaluating conservation priorities has stressed the importance of basal taxa. The "Evolutionary Distinctiveness" index (ED) is a species-specific index that includes branch length expressed as an absolute value measured in millions of years that can be applied to a single terminal taxon in a phylogeny. The ED depends on the tree pattern, i.e. of a cladogram included into a time-scale. When calculated for the Australian lungfish (Neoceratodus forsteri), a threatened dipnoan that occurs naturally only in southeast Queensland, the ED index shows variable value according to the chosen tree. On the basis of a recently proposed phylogeny including a new fossil find from the Early Cretaceous of Thailand, the ED value reaches the highest value for piscine sarcopterygians, and for all vertebrates, and thus reinforces the "originality" of this fish. This example points out the importance of fossils in the resolution of phylogenies and beyond, in the calculation of indexes supporting conservation decisions. © 2011 Elsevier Ltd.

Mahnert V.,Museum dHistoire Naturelle de la Ville de Geneva
Revue Suisse de Zoologie | Year: 2014

25 species in ten families are recorded from 25 islands and islets of the Galapagos archipelago. Ten new species are described and figured: Paraliochthonius galapagensis, P. litoralis, P. pecki, P. rupicola (Chthoniidae); Ideoblothrus emigrans, I. galapagensis (Syarinidae); Serianus elongatus, S. mahtimus (Garypinidae); Garypus granosus (Garypidae); Cryptocheiridium confundens (Cheiridiidae). Aphelolpium cayanum Muchmore, 1979 and Withius piger (Simon, 1878) are additions to the fauna of the Galapagos; Ideobisium simile (Balzan, 1892), Serianus pusillimus Beier, 1959 and Neocheiridium corticum (Balzan, 1887) are removed from the faunal list of the archipelago. Three new synonymies are proposed: Atemnus insularis Banks, 1902 is a junior subjective synonym of Paratemnoides nidiflcator (Balzan, 1888); Parachernes d. darwiniensis Beier, 1978 is a junior subjective synonym of Parachernes nigrimanus (Banks, 1902); Parachernes darwiniensis maculosus Beier, 1978 is a junior subjective synonym of Parachernes galapagensis Beier, 1977. Withius piger (Simon, 1878) is recorded for the first time from Bermuda. The new combination Cryptocheiridium insulare (Vitali-di Castri, 1984) is proposed for Cheiridium insulare from Guadeloupe.

Schwendinger P.J.,Museum dHistoire Naturelle de la Ville de Geneva
Revue Suisse de Zoologie | Year: 2013

Nineteen Perania snecies are recognized, keyed and attributed to five species-groups. Eight new species are described, P tumida, P ferox, P quadrifurcata and P. egregia from northern, northwestern and northeastern Thailand, P. utara, P. harau, P deelemanae and P. selatan from Sumatra. The female copulatory organs of P armata (Thorell, 1890), P. nigra (Thorell, 1890), P. picea (Thorell, 1890) and P birmanica (Thorell, 1898; known only from the holotype) are illustrated for the first time. Perania armata, type species of the monotypic genus Mirania Lehtinen, 1981, is shown to be the sister species of P. nigra, type species of Perania, and thus Mirania is kept in the synonymy of Perania. Perania korinchica Hogg, 1919 is removed from the synonymy of P. picea and re-described from a male collected at the type locality. New material of P. robusta Schwendinger, 1989, P nasuta Schwendinger, 1989 and P. siamensis Schwendinger, 1994 from northern and southern Thailand, of P. cerastes Schwendinger, 1994 from peninsular Malaysia, and of P. nigra, P. picea and P. armata from Sumatra is presented. Two morphological forms are recognized for P. cerastes. Taxonomic characters and relationships are discussed; general information on the biology of some of these species is given.

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