From ea44bbb1750fdd4c11385b7af6d43904ecaaaebb Mon Sep 17 00:00:00 2001 From: ggserver Date: Mon, 10 Feb 2025 17:50:39 +0000 Subject: [PATCH] Add updates up until 2025-02-10 17:45:35 --- .../87/03FD87F90B2FFB6EFCA6F8B5FADDF974.xml | 131 +++++++++--------- 1 file changed, 67 insertions(+), 64 deletions(-) diff --git a/data/03/FD/87/03FD87F90B2FFB6EFCA6F8B5FADDF974.xml b/data/03/FD/87/03FD87F90B2FFB6EFCA6F8B5FADDF974.xml index fb4aa92dbb5..99deb741277 100644 --- a/data/03/FD/87/03FD87F90B2FFB6EFCA6F8B5FADDF974.xml +++ b/data/03/FD/87/03FD87F90B2FFB6EFCA6F8B5FADDF974.xml @@ -1,79 +1,82 @@ - - - -Caudal autotomy in Mesosaurus tenuidens Gervais, 1865 under scrutiny and a surprising new pattern of vertebral organization in the mesosaur tail + + + +Caudal autotomy in Mesosaurus tenuidens Gervais, 1865 under scrutiny and a surprising new pattern of vertebral organization in the mesosaur tail - - -Author + + +Author -Piñeiro, Graciela -Departamento de Paleontología, Facultad de Ciencias, Iguá 4225, CP 11400, Montevideo (Uruguay) -fossil@fcien.edu.uy +Piñeiro, Graciela +Departamento de Paleontología, Facultad de Ciencias, Iguá 4225, CP 11400, Montevideo (Uruguay) +fossil@fcien.edu.uy - - -Author + + +Author -Ferigolo, Jorge -Seção de Paleontologia, Museu de Ciências Naturais, Secretaria do Meio Ambiente e Infraestrutura do Rio Grande do Sul (SEMA), Rua Salvador França, 1427 - 90 690 - 000, Porto Alegre, RS (Brazil) -jorgeferigolo@gmail.com +Ferigolo, Jorge +Seção de Paleontologia, Museu de Ciências Naturais, Secretaria do Meio Ambiente e Infraestrutura do Rio Grande do Sul (SEMA), Rua Salvador França, 1427 - 90 690 - 000, Porto Alegre, RS (Brazil) +jorgeferigolo@gmail.com - - -Author + + +Author -Farias, Brodsky Dantas Macedo de -Programa de Pós-Graduação em Zoologia, Universidade Federal do Rio de Janeiro, Museu Nacional, Parque Quinta da Boa Vista, 20940040, Rio de Janeiro, RJ (Brazil) -brodskymacedo@gmail.com +Farias, Brodsky Dantas Macedo de +Programa de Pós-Graduação em Zoologia, Universidade Federal do Rio de Janeiro, Museu Nacional, Parque Quinta da Boa Vista, 20940040, Rio de Janeiro, RJ (Brazil) +brodskymacedo@gmail.com - - -Author + + +Author -Demarco, Pablo Núñez -Instituto de Ciencias Geológicas, Facultad de Ciencias. Universidad de la República, Iguá 4225, CP 11400 Montevideo (Uruguay) -pnunez@fcien.edu.uy +Demarco, Pablo Núñez +Instituto de Ciencias Geológicas, Facultad de Ciencias. Universidad de la República, Iguá 4225, CP 11400 Montevideo (Uruguay) +pnunez@fcien.edu.uy - - -Author + + +Author -Laurin, Michel -Centre de Recherche en Paléontologie (CR 2 P), CNRS, MNHN, Sorbonne Université, Muséum national d’Histoire naturelle, Département Origines & Évolution, CP 38, 57 rue Cuvier, F- 75231 Paris cedex 05 (France) -michel.laurin@mnhn.fr +Laurin, Michel +Centre de Recherche en Paléontologie (CR 2 P), CNRS, MNHN, Sorbonne Université, Muséum national d’Histoire naturelle, Département Origines & Évolution, CP 38, 57 rue Cuvier, F- 75231 Paris cedex 05 (France) +michel.laurin@mnhn.fr -text - - -Geodiversitas +text + + +Geodiversitas - -2025 - -2025-01-23 + +2025 + +2025-01-23 - -47 + +47 - -2 + +2 - -17 -38 + +17 +38 - -https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/geodiversitas2025v47a2.pdf + +https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/geodiversitas2025v47a2.pdf -journal article -10.5252/geodiversitas2025v47a2 -1638-9395 -urn:lsid:zoobank.org:pub:5A325306-2A4B-4655-8563-2365659051CF +journal article +308063 +10.5252/geodiversitas2025v47a2 +578ac391-0f87-4523-a05d-2b79223fd193 +1638-9395 +14846145 +urn:lsid:zoobank.org:pub:5A325306-2A4B-4655-8563-2365659051CF - + @@ -92,7 +95,7 @@ Shine ) constitute a specialized string characterized by the presence of ribs firmly attached to the short transverse processes, the lack of haemal arches (chevrons) and also the absence of “fracture/suture planes”. However, in mesosaurs the last vertebrae of the pygal segment can carry an haemal arch. - + FIG . 2. — @@ -121,7 +124,7 @@ from the Mangrullo Formation of Uruguay. Morphology of the last caudal vertebrae ) in the preserved vertebrae. They must consequently be part of the last of the “pygal-like” series because the anterior portion of that segment lack chevrons, whereas in the postpygal vertebrae, transverse processes are very poorly developed, if at all. Scale bars: 10 mm. - + TABLE 1. — List of studied specimens in this work. @@ -670,7 +673,7 @@ Berman 1987 ). From the sixth to the ninth or tenth vertebrae, the ribs abruptly decrease in size with the last three either bent anteriorly or pointing laterally ( -Fig. 1 +Fig. 1 ). These anteriormost nine to ten caudal vertebrae may be considered as the “pygal-like” segment, which in extant squamates possessing intravertebral autotomy, is associated with the insertion of the caudofemoralis longus muscle, and thus autotomy cannot occur in vertebrae of this segment which is typically characterized by the absence of fracture planes ( Ritzman @@ -681,9 +684,9 @@ Ritzman Due to the presence of long and firmly fused ribs, a condition which is morphologically similar to that observed in the posterior dorsal vertebrae ( -Fig. 1 +Fig. 1 ), the ribs of the first ten caudal vertebrae of mesosaurs are often preserved parallel to the stratification, and thus, the vertebrae are mostly exposed in ventral or dorsal view, or in a frontal or antero/posterolateral view on rare occasions. This makes it challenging to confirm the existence of potential “fracture planes” (from now on referred to as “fracture/suture planes”) within these anteriomost caudal vertebrae. However, some fortuitous isolated vertebrae recognized as part of the “pygal segment” because they bear short transverse processes carrying a rib, show that there are no central fractures in these vertebrae at the midcentrum area. The presence of haemal arches in the last vertebrae of the “pygal-like” segment can also be confirmed by examining these isolated vertebrae ( -Fig. 2C, D +Fig. 2C, D ). @@ -696,12 +699,12 @@ Due to the presence of long and firmly fused ribs, a condition which is morpholo The putative “fracture/suture planes” described byMacDougall et al. (2020) as evidence for autotomy in mesosaurs are present in vertebrae placed posterior to the last vertebra of the pygal segment. This vertebral segment will be known as the postpygal string and is characterized by vertebrae with diminutive transverse processes in the cranialmost segments (or none whatsoever, farther caudally), and are predominantly preserved in lateral view ( -Fig. 3 +Fig. 3 ). The mesosaurid “postpygal” segment is formed by at least 56 vertebrae, some of which articulate with short ribs, if at all, but this condition is gradually lost in caudal direction. Most of them also bear haemal arches (chevrons); and only the last five or six vertebrae near to the tip of the tail are simplified and lack neural spines or haemal arches ( -Fig. 3B, C +Fig. 3B, C ). @@ -717,7 +720,7 @@ possessed a long tail consisting of more than 60 vertebrae, a length similar to and all the basalmost stegocephalians ( Romer 1947 ). Moreover, based on the described general pattern for mesosaur caudal vertebrae, it is possible to identify the relative position of isolated caudal vertebrae in the tail, and also determine if it is part of the “pygal-like” or the “post-pygal” series through the orientation of the transverse processes and ribs and by the presence/absence of haemal arches ( -Fig. 3 +Fig. 3 ).