caa a22 4500 38801783X CHVBK 20180307124916.0 cr unu---uuuuu 161130e199805 xx s 000 0 eng 10.1017/S0022336000024173 doi S0022336000024173 pii (NATIONALLICENCE)cambridge-10.1017/S0022336000024173 The internal features of some Paleozoic rhynchonellid brachiopods [Elektronische Daten] [Norman M. Savage, Eric H. Goodwin] The genera Lissopleura, Sphaerirhynchia, Pectorhyncha, Yanishewskiella, and Terebratuloidea have been investigated to elucidate their internal features and taxonomic relationships. Specimens of the type species of these genera were sectioned. Lissopleura remains slightly enigmatic in that the holotype of Lissopleura aequivalvis is thinner and has a less pronounced fold than most specimens in the collection, including the one sectioned by us. The holotype is probably immature and is within the range of variation of specimens from the type area. The internal features lead us to assign Lissopleura to the Trigonirhynchiidae. Sphaerirhynchia wilsoni has a short septalium without a cover plate and other features that place it in the Hebetoechiidae. Pectorhyncha obtusiplicata has a very thick shell and a septalium filled by a large, bilobed cardinal process. The genus has several features similar to Obturamentella, and is assigned to the Obturamentellidae. Yanishewskiella angulata, which is retained within the Tetracameridae, has a spondylium with lateral buttresses, and a septalium into which the medium septum projects. Terebratuloidea davidsoni has small dental plates, and is assigned to the Allorhynchidae. Copyright © The Paleontological Society Savage Norman M. Department of Geological Sciences, University of Oregon, Eugene 97403 <nmsavage@oregon.uoregon.edu> aut Goodwin Eric H. Department of Geological Sciences, University of Oregon, Eugene 97403 <egood@gladstone.uoregon.edu> aut Journal of Paleontology Cambridge University Press 72/3(1998-05), 437-441 0022-3360 72:3<437 1998 72 JPA https://doi.org/10.1017/S0022336000024173 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0022336000024173 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Savage Norman M. Department of Geological Sciences, University of Oregon, Eugene 97403 <nmsavage@oregon.uoregon.edu> aut NATIONALLICENCE 700 1- Goodwin Eric H. Department of Geological Sciences, University of Oregon, Eugene 97403 <egood@gladstone.uoregon.edu> aut NATIONALLICENCE 773 0- Journal of Paleontology Cambridge University Press 72/3(1998-05), 437-441 0022-3360 72:3<437 1998 72 JPA CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge