Results 11 to 20 of about 8,830 (229)

The earliest ostracods: the geological evidence

Senckenbergiana lethaea, 2008
The oldest assumed ostracods appear in the fossil record from the TremadocianPaltodus deltifer conodont Biozone. Although geographically widespread these early ostracods have no obvious Cambrian antecedents. Their first appearance at ca. 485 Ma contrasts with molecular evidence that suggests a much earlier (latest Proterozoic or Cambrian) origin for ...
Williams, M., Siveter, D.J., Salas, M.J., Vannier, Jean, Popov, L.E., Pour, M.G   +5 more
openaire   +4 more sources

Dead Shells Bring to Life Baselines for Conservation: Case Studies from The Bahamas, Southern California, and Wisconsin, USA

Diversity, 2023
We are living in a time of rapid biodiversity loss. Numerous studies have shown that modern extinction rates are higher than pre-human background rates. However, these studies of biodiversity decline almost exclusively focus on large vertebrates.
Andrew V. Michelson, Julian J. Spergel, Katalina C. Kimball, Lisa Park Boush, Jill S. Leonard-Pingel   +4 more
doaj   +1 more source

Two new species of Cypricercinae McKenzie, 1971 (Crustacea: Ostracoda) from Thailand

European Journal of Taxonomy, 2021
Two new species of the subfamily Cypricercinae McKenzie, 1971 are described from the Western part of Thailand: Pseudostrandesia ratchaburiensis sp. nov. and Strandesia prachuapensis sp. nov. Pseudostrandesia ratchaburiensis sp. nov.
Sukonthip Savatenalinton
doaj   +1 more source

Lake-Level Changes and Their Paleo-Climatic Implications at the MIS12 Lower Paleolithic (Middle Pleistocene) Site Marathousa 1, Greece

Frontiers in Earth Science, 2021
Lithics and cut-marked mammal bones, excavated from the paleo-lake Marathousa 1 (MAR-1) sediments in the Megalopolis Basin, southern Greece, indicate traces of hominin activity occurring along a paleo-shoreline ca. 444,000 years (444 ka) ago.
Ines J. E. Bludau, Ines J. E. Bludau, Penelope Papadopoulou, George Iliopoulos, Max Weiss, Ellen Schnabel, Nicholas Thompson, Nicholas Thompson, Vangelis Tourloukis, Vangelis Tourloukis, Charlotte Zachow, Styliani Kyrikou, Styliani Kyrikou, George E. Konidaris, George E. Konidaris, Panagiotis Karkanas, Eleni Panagopoulou, Katerina Harvati, Katerina Harvati, Katerina Harvati, Annett Junginger, Annett Junginger   +21 more
doaj   +1 more source

Diet of larval Ambystoma rivulare (Caudata: Ambystomatidae), a threatened salamander from the Volcán Nevado de Toluca, Mexico

Phyllomedusa: Journal of Herpetology, 2015
Several species of salamander in the genus Ambystoma occur in the mountains surrounding Mexico City and are considered at risk of extinction. However, little is known about their ecology and natural history. The Toluca Stream Siredon (Ambystoma rivulare)
Julio A. Lemos-Espinal, Geoffrey R. Smith, Guillermo A. Woolrich-Piña, Raymundo Montoya-Ayala   +3 more
doaj   +3 more sources

Periphytic community structure of Ostracoda (Crustacea) in the river-floodplain system of the Upper Paraná River

Acta Limnologica Brasiliensia, 2017
Aim: We assessed the effect of environmental factors on the structure of periphytic ostracods communities along the river-floodplain system of the Upper Paraná River.
Janet Higuti, Eliezer de Oliveira da Conceição, Ramiro de Campos, Vitor Góis Ferreira, Jonathan da Rosa, Márian Bozzo de Oliveira Pinto, Koen Martens   +6 more
doaj   +1 more source

Ostracods (Crustacea) associated with microbialites across the Permian-Triassic boundary in Dajiang (Guizhou Province, South China) [PDF]

, 2012
26 samples were processed for a taxonomic study of ostracods from the Upper Permian (Changhsingian) - Lower Triassic (Griesbachian) interval of the Dajiang section, Guizhou Province, South China. 112 species belonging to 27 genera are recognized.
Marie-Beatrice FOREL, Forel, Marie-Béatrice, Forel, Marie-B\ue9atrice   +2 more
core   +1 more source

A summary of the Brazilian Paraná Basin Ordovician [PDF]

Estonian Journal of Earth Sciences, 2023
The study of the Ordovician of Paraná Basin culminated on the three-fold lithostratigraphic subdivision of the Rio Ivaí Group as follows: Alto Garças, Iapó and Vila Maria formations.
Carolina Zabini, Lívia Rodrigues, Fernando Lavié, Ana Beatriz Furtado-Carvalho, Enrique Alberto Randolfe, Juan José Rustán, Francisco Arouca, Ana Laura Silva Gomes, Rodrigo Adôrno, Matheus Denezine, Dermeval A. do Carmo, Mário L. Assine   +11 more
doaj   +1 more source

Extraordinary morphological changes in valve morphology during the ontogeny of several species of the Australian ostracod genus Bennelongia (Crustacea, Ostracoda) [PDF]

, 2013
Ostracods belonging to the genus Bennelongia differ much in valve morphology between adults and juveniles. Adult valves are asymmetrical, characterised by a beak-like feature in the anteroventral region of the left valve, and, with some notable ...
De Deckker, Patrick, Martens, Koen, Deckker, Patrick De, Patrick De Deckker, Martens, Koenraad, De Deckker, P., Koen Martens   +6 more
core   +1 more source

The Effects of Symbiote Ostracods on Invasive Crayfish Behavior [PDF]

, 2021
Invasive crayfish, Procambarus clarkii, are known to negatively impact the biodiversity of Santa Monica Mountain streams. Small symbiotes, ostracods, live on Procambarus clarkii in some local streams.
Vetter, Elyse, Bucciarelli, Gary, Kats, Lee, Fontes, Audrey   +3 more
core