caa a22 4500 388016809 CHVBK 20180307124913.0 cr unu---uuuuu 161130e199807 xx s 000 0 eng 10.1017/S0022336000040397 doi S0022336000040397 pii (NATIONALLICENCE)cambridge-10.1017/S0022336000040397 Ordovician (Whiterock) calymenid and encrinurid trilobites from the Precordillera of Argentina [Elektronische Daten] [Gregory D. Edgecombe, Brian D. E. Chatterton, Beatriz G. Waisfeld, Norberto E. Vaccari] Phacopida from upper Whiterock (Lower Caradoc) horizons in the Las Aguaditas Formation of San Juan Province, Argentina, include the calymenid Platycalymene trapezoidalis (Baldis and Pöthe, 1995) and the encrinurids Frencrinuroides edseli new species, Lasaguaditas oweni new genus and species, and Walencrinuroides? new species A. Sulcocalymene Baldis and Pöthe, 1995, a purported subgenus of Flexicalymene, is a junior subjective synonym of Platycalymene Shirley, 1936. Platycalymene is now known from Avalonia, Baltica, Laurentia (Scotland), and the Precordillera. Emending the cladistic analysis of Ordovician Encrinurinae by Lespérance and Desbiens (1995), the monophyly and membership of Frencrinuroides and Walencrinuroides are ambiguous. Frencrinuroides edseli is closely related to species from eastern Laurentia. Lasaguaditas new genus is superficially cybelinid-like in some respects but shares several derived characters with the Encrinurinae. All three encrinurinid species in the Las Aguaditas Formation possess two instars in the protaspid period, a general pattern in Ordovician encrinurinid ontogeny. Copyright © The Paleontological Society Edgecombe Gregory D. Australian Museum, 6 College Street, Sydney South, NSW 2000, Australia aut Chatterton Brian D. E. Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta T6G 2E3, Canada aut Waisfeld Beatriz G. CONICET, Museo Argentino de Ciencias Naturales "Bernardino Rivadavia”, Avenida ángel Gallardo 470, 1405 Buenos Aires, Argentina aut Vaccari Norberto E. CONICET, Cátedra de Estratigrafía y Geología Histórica, Universidad Nacional de Córdoba, Avenida Vélez Sársfield 299,C.C. 395, 5000 Córdoba, Argentina aut Journal of Paleontology Cambridge University Press 72/4(1998-07), 678-697 0022-3360 72:4<678 1998 72 JPA https://doi.org/10.1017/S0022336000040397 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0022336000040397 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Edgecombe Gregory D. Australian Museum, 6 College Street, Sydney South, NSW 2000, Australia aut NATIONALLICENCE 700 1- Chatterton Brian D. E. Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta T6G 2E3, Canada aut NATIONALLICENCE 700 1- Waisfeld Beatriz G. CONICET, Museo Argentino de Ciencias Naturales "Bernardino Rivadavia”, Avenida ángel Gallardo 470, 1405 Buenos Aires, Argentina aut NATIONALLICENCE 700 1- Vaccari Norberto E. CONICET, Cátedra de Estratigrafía y Geología Histórica, Universidad Nacional de Córdoba, Avenida Vélez Sársfield 299,C.C. 395, 5000 Córdoba, Argentina aut NATIONALLICENCE 773 0- Journal of Paleontology Cambridge University Press 72/4(1998-07), 678-697 0022-3360 72:4<678 1998 72 JPA CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge