INVESTIGADORES
CASADIO Silvio Alberto
artículos
Título:
Frequency and distribution of Lithophaga (Mytilidae) perforations in recent and fossil oysters: taphonomic and paleobiological implications
Autor/es:
MAUNA, CECILIA; CASADIO, SILVIO; PARRAS, ANA; PASCUAL, MARCELA
Revista:
AMEGHINIANA
Editorial:
Asociación Paleontológica Argentina
Referencias:
Lugar: Buenos Aires; Año: 2005 vol. 42 p. 395 - 405
ISSN:
0002-7014
Resumen:
Abstract. In this study we analyze the abundance and distribution patterns of Lithophaga patagonica in valves ofIn this study we analyze the abundance and distribution patterns of Lithophaga patagonica in valves of
Ostrea puelchana and compare them to those of Lithophaga sp. observed on the fossil species Ostrea patagonicaand compare them to those of Lithophaga sp. observed on the fossil species Ostrea patagonica
and Ostrea alvarezii from the late Miocene Puerto Madryn Formation. No specimen of the fossil oysters
showed borings of Lithophaga sp. on the interior surface of the valves. This suggests that they were produced
while the oysters were still living and, at the same time, that the oyster beds were buried rapidly after death. InOstrea alvarezii from the late Miocene Puerto Madryn Formation. No specimen of the fossil oysters
showed borings of Lithophaga sp. on the interior surface of the valves. This suggests that they were produced
while the oysters were still living and, at the same time, that the oyster beds were buried rapidly after death. InLithophaga sp. on the interior surface of the valves. This suggests that they were produced
while the oysters were still living and, at the same time, that the oyster beds were buried rapidly after death. In
Ostrea puelchana the boring abundance was significantly higher for the left valve and, within it, the areas more
heavily bored were the umbones and the platform. The same results were obtained for valves of Ostrea alvarezii,
suggesting that this oyster showed life habits similar to the living one. On the other hand, in Ostreathe boring abundance was significantly higher for the left valve and, within it, the areas more
heavily bored were the umbones and the platform. The same results were obtained for valves of Ostrea alvarezii,
suggesting that this oyster showed life habits similar to the living one. On the other hand, in OstreaOstrea alvarezii,
suggesting that this oyster showed life habits similar to the living one. On the other hand, in OstreaOstrea
patagonica the abundance of Lithophaga borings was the same on both valves. This agrees well with its life habit,
in which the shells mainly are oriented almost vertically. The left valve of Ostrea patagonica showed no preferential
location for the borings. In the right valves of Ostrea patagonica the posterior and anterior margins
show perforation values that are higher than expected. Results suggest that the life position of oysters is one of
the factors influencing the abundance and distribution of Lithophaga borings. This information is useful to infer
the life position of fossil oysters and to reconstruct their taphonomic history.the abundance of Lithophaga borings was the same on both valves. This agrees well with its life habit,
in which the shells mainly are oriented almost vertically. The left valve of Ostrea patagonica showed no preferential
location for the borings. In the right valves of Ostrea patagonica the posterior and anterior margins
show perforation values that are higher than expected. Results suggest that the life position of oysters is one of
the factors influencing the abundance and distribution of Lithophaga borings. This information is useful to infer
the life position of fossil oysters and to reconstruct their taphonomic history.Ostrea patagonica showed no preferential
location for the borings. In the right valves of Ostrea patagonica the posterior and anterior margins
show perforation values that are higher than expected. Results suggest that the life position of oysters is one of
the factors influencing the abundance and distribution of Lithophaga borings. This information is useful to infer
the life position of fossil oysters and to reconstruct their taphonomic history.Ostrea patagonica the posterior and anterior margins
show perforation values that are higher than expected. Results suggest that the life position of oysters is one of
the factors influencing the abundance and distribution of Lithophaga borings. This information is useful to infer
the life position of fossil oysters and to reconstruct their taphonomic history.