Encrusting patterns and life habit of Mesozoic trigonioids: A case study of Steinmanella quintucoensis (Weaver) from the Early Cretaceous of Argentina

Trigonioid bivalves of the genus Steinmanella Crickmay are abundant at the top of the Vaca Muerta Formation, Neuquén Basin of Argentina, of Early Valanginian age. The species Steinmanella quintucoensis (Weaver) is frequently encrusted by oysters, serpulids and mytilids. Oysters are the most conspicu...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autor principal: Luci, L.
Formato: JOUR
Materias:
abundance
bivalve
Cretaceous
functional morphology
Mesozoic
paleoecology
sediment-water interface
shell
sponge
taphonomy
taxonomy
Argentina
Neuquen Basin
Bivalvia
Mytilidae
Ostreidae
Serpulidae
Steinmanella
Trigonioida
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00241164_v43_n4_p529_Luci
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00241164_v43_n4_p529_Luci
record_format dspace
spelling todo:paper_00241164_v43_n4_p529_Luci2023-10-03T14:34:29Z Encrusting patterns and life habit of Mesozoic trigonioids: A case study of Steinmanella quintucoensis (Weaver) from the Early Cretaceous of Argentina Luci, L. abundance bivalve Cretaceous functional morphology Mesozoic paleoecology sediment-water interface shell sponge taphonomy taxonomy Argentina Neuquen Basin Bivalvia Mytilidae Ostreidae Serpulidae Steinmanella Trigonioida Trigonioid bivalves of the genus Steinmanella Crickmay are abundant at the top of the Vaca Muerta Formation, Neuquén Basin of Argentina, of Early Valanginian age. The species Steinmanella quintucoensis (Weaver) is frequently encrusted by oysters, serpulids and mytilids. Oysters are the most conspicuous encruster, followed by serpulids and then mytilids. A taphonomic, palaeoecological and taxonomic analysis was performed on the encrusting fauna of S. quintucoensis. An analysis of encrusting preference was performed on the basis of differences in ornamentation of the host shell, which was divided in a strongly tubercled flank and a smoother ribbed corselet and escutcheon zone. A higher encrustation frequency was found for the corselet and escutcheon zone, over the larger flank. Possible explanations are differences in the sculpture of each part of the valve, closeness to the respiratory openings of the host, and relation to life position of the trigonioids. In this respect, a palaeoecological analysis of the life position of the genus Steinmanella was made on the basis of functional morphology, encrustation patterns and comparison with related fossil forms as well as living representatives, finding that the most suitable position to explain encrustation patterns and functional morphology is one with the flanks below the water-sediment interface, and the corselets exposed above the substrate. Early Cretaceous, encrustation, Neuquén Basin, trigonioids. © 2010 The Authors, Journal compilation © 2010 The Lethaia Foundation. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00241164_v43_n4_p529_Luci
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic abundance
bivalve
Cretaceous
functional morphology
Mesozoic
paleoecology
sediment-water interface
shell
sponge
taphonomy
taxonomy
Argentina
Neuquen Basin
Bivalvia
Mytilidae
Ostreidae
Serpulidae
Steinmanella
Trigonioida
spellingShingle abundance
bivalve
Cretaceous
functional morphology
Mesozoic
paleoecology
sediment-water interface
shell
sponge
taphonomy
taxonomy
Argentina
Neuquen Basin
Bivalvia
Mytilidae
Ostreidae
Serpulidae
Steinmanella
Trigonioida
Luci, L.
Encrusting patterns and life habit of Mesozoic trigonioids: A case study of Steinmanella quintucoensis (Weaver) from the Early Cretaceous of Argentina
topic_facet abundance
bivalve
Cretaceous
functional morphology
Mesozoic
paleoecology
sediment-water interface
shell
sponge
taphonomy
taxonomy
Argentina
Neuquen Basin
Bivalvia
Mytilidae
Ostreidae
Serpulidae
Steinmanella
Trigonioida
description Trigonioid bivalves of the genus Steinmanella Crickmay are abundant at the top of the Vaca Muerta Formation, Neuquén Basin of Argentina, of Early Valanginian age. The species Steinmanella quintucoensis (Weaver) is frequently encrusted by oysters, serpulids and mytilids. Oysters are the most conspicuous encruster, followed by serpulids and then mytilids. A taphonomic, palaeoecological and taxonomic analysis was performed on the encrusting fauna of S. quintucoensis. An analysis of encrusting preference was performed on the basis of differences in ornamentation of the host shell, which was divided in a strongly tubercled flank and a smoother ribbed corselet and escutcheon zone. A higher encrustation frequency was found for the corselet and escutcheon zone, over the larger flank. Possible explanations are differences in the sculpture of each part of the valve, closeness to the respiratory openings of the host, and relation to life position of the trigonioids. In this respect, a palaeoecological analysis of the life position of the genus Steinmanella was made on the basis of functional morphology, encrustation patterns and comparison with related fossil forms as well as living representatives, finding that the most suitable position to explain encrustation patterns and functional morphology is one with the flanks below the water-sediment interface, and the corselets exposed above the substrate. Early Cretaceous, encrustation, Neuquén Basin, trigonioids. © 2010 The Authors, Journal compilation © 2010 The Lethaia Foundation.
format JOUR
author Luci, L.
author_facet Luci, L.
author_sort Luci, L.
title Encrusting patterns and life habit of Mesozoic trigonioids: A case study of Steinmanella quintucoensis (Weaver) from the Early Cretaceous of Argentina
title_short Encrusting patterns and life habit of Mesozoic trigonioids: A case study of Steinmanella quintucoensis (Weaver) from the Early Cretaceous of Argentina
title_full Encrusting patterns and life habit of Mesozoic trigonioids: A case study of Steinmanella quintucoensis (Weaver) from the Early Cretaceous of Argentina
title_fullStr Encrusting patterns and life habit of Mesozoic trigonioids: A case study of Steinmanella quintucoensis (Weaver) from the Early Cretaceous of Argentina
title_full_unstemmed Encrusting patterns and life habit of Mesozoic trigonioids: A case study of Steinmanella quintucoensis (Weaver) from the Early Cretaceous of Argentina
title_sort encrusting patterns and life habit of mesozoic trigonioids: a case study of steinmanella quintucoensis (weaver) from the early cretaceous of argentina
url http://hdl.handle.net/20.500.12110/paper_00241164_v43_n4_p529_Luci
work_keys_str_mv AT lucil encrustingpatternsandlifehabitofmesozoictrigonioidsacasestudyofsteinmanellaquintucoensisweaverfromtheearlycretaceousofargentina
_version_ 1807323047077609472

Ejemplares similares