Portal de Periódicos da CAPES

BIOGEOGRAPHIC SHELL SHAPE VARIATION IN TROPHON GEVERSIANUS (GASTROPODA: MURICIDAE) ALONG THE SOUTHWESTERN ATLANTIC COAST

2018; Society for Sedimentary Geology; Volume: 33; Issue: 11 Linguagem: Inglês

10.2110/palo.2018.060

1938-5323

Mariano E. Malvé, Marcelo M. Rivadeneira, Sandra Gordillo,

Marine and environmental studies

Research Article| November 20, 2018 BIOGEOGRAPHIC SHELL SHAPE VARIATION IN TROPHON GEVERSIANUS (GASTROPODA: MURICIDAE) ALONG THE SOUTHWESTERN ATLANTIC COAST MARIANO E. MALVÉ; MARIANO E. MALVÉ 1Facultad de Ciencias Naturales y Ciencias de la Salud, Universidad Nacional de la Patagonia San Juan Bosco, Ruta Provincial 1 s/n (9000), Comodoro Rivadavia, Argentina Search for other works by this author on: GSW Google Scholar MARCELO M. RIVADENEIRA; MARCELO M. RIVADENEIRA 2Centro de Estudios Avanzados en Zonas Áridas (CEAZA), Av. Bernardo Ossandón 877, C.P. 1781681, Coquimbo, Chile 3Departamento de Biología Marina, Facultad de Ciencias del Mar, Universidad Católica del Norte, Larrondo 1281, Coquimbo, Chile 4Departamento Biología, Universidad de La Serena, Av. Raúl Bitrán 1305, La Serena, Chile Search for other works by this author on: GSW Google Scholar SANDRA GORDILLO SANDRA GORDILLO 5Universidad Nacional de Córdoba, Facultad de Ciencias Exactas, Físicas y Naturales, Córdoba, Argentina 6Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Centro de Investigaciones en Ciencias de la Tierra, (CICTERRA), Av. Vélez Sársfield 1611, Edificio CICTERRA, 1° Piso of. 18, X5016CGA, Ciudad Universitaria, Córdoba, Argentina Search for other works by this author on: GSW Google Scholar Author and Article Information MARIANO E. MALVÉ 1Facultad de Ciencias Naturales y Ciencias de la Salud, Universidad Nacional de la Patagonia San Juan Bosco, Ruta Provincial 1 s/n (9000), Comodoro Rivadavia, Argentina MARCELO M. RIVADENEIRA 2Centro de Estudios Avanzados en Zonas Áridas (CEAZA), Av. Bernardo Ossandón 877, C.P. 1781681, Coquimbo, Chile 3Departamento de Biología Marina, Facultad de Ciencias del Mar, Universidad Católica del Norte, Larrondo 1281, Coquimbo, Chile 4Departamento Biología, Universidad de La Serena, Av. Raúl Bitrán 1305, La Serena, Chile SANDRA GORDILLO 5Universidad Nacional de Córdoba, Facultad de Ciencias Exactas, Físicas y Naturales, Córdoba, Argentina 6Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Centro de Investigaciones en Ciencias de la Tierra, (CICTERRA), Av. Vélez Sársfield 1611, Edificio CICTERRA, 1° Piso of. 18, X5016CGA, Ciudad Universitaria, Córdoba, Argentina email: marianomalve@gmail.com Publisher: SEPM Society for Sedimentary Geology First Online: 20 Nov 2018 Online Issn: 1938-5323 Print Issn: 0883-1351 Copyright © 2018, SEPM (Society for Sedimentary Geology) PALAIOS (2018) 33 (11): 498–507. https://doi.org/10.2110/palo.2018.060 Article history First Online: 20 Nov 2018 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation MARIANO E. MALVÉ, MARCELO M. RIVADENEIRA, SANDRA GORDILLO; BIOGEOGRAPHIC SHELL SHAPE VARIATION IN TROPHON GEVERSIANUS (GASTROPODA: MURICIDAE) ALONG THE SOUTHWESTERN ATLANTIC COAST. PALAIOS 2018;; 33 (11): 498–507. doi: https://doi.org/10.2110/palo.2018.060 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyPALAIOS Search Advanced Search Abstract Broad-scale latitudinal morphological trends in gastropods along the southwestern Atlantic coast are scant, since the majority of studies have focused on local scales. Here, we evaluate biogeographic shell shape variation in the marine gastropod Trophon geversianus across most of its distributional range, covering 14 degrees of latitude. Samples come from death assemblages which have the potential to unveil biogeographic patterns along spatio-temporal scales and are not affected by short-term volatility in comparison with living assemblages. We performed morphometric analyses on shells from death assemblages, and compared shape variation between mid-Holocene and modern shells from one southern site. Multivariate analyses identified two morphotypes matching the biogeographic regions of the Argentine Sea that segregates a warm-temperate from a cold-temperate zone. The Magellan province morphotype is characterized by a larger shell, lower spire height, and higher aperture length than the Argentinean province morphotype. This change in shell shape is significantly correlated to sea surface temperature, even after accounting for spatial autocorrelation, which could be indirectly influencing intraspecific morphoclines via shifts in growth rates. On the other side, shell size and shape variations were also detected (size increase over recent geological time) between mid-Holocene and modern specimens at the Beagle Channel, which could be attributed to paleoenvironmental changes and to shifts in predator-prey relationships. Our study illustrates the usefulness of death assemblages for revealing large-scale patterns of shell-shape variability in mollusk species, and highlights the spatial coincidence of intraspecific morphological differentiation with the transition zone between biogeographic provinces of the Argentine Sea. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.