The duplivincular ligament of recent <i>Pinna Nobilis</i> L., 1758: further evidence for pterineid ancestry of the Pinnoidea

García‐March, José Rafael; Márquez-Aliaga, Ana; Carter, J. G.

doi:10.1666/06-096.1

Cited by 10 publications

(4 citation statements)

References 9 publications

(9 reference statements)

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“…Geochemical sampling of P. nobilis shells has been traditionally performed on the external shell surface. The external shell surface is strongly abraded in adults [ García‐March and Márquez‐Aliaga , 2007; García‐March et al , 2008] and bioeroded by encrusting organisms [ Zavodnik , 1967; Corriero and Pronzato , 1987; Giacobbe , 2002; Cosentino and Giacobbe , 2008]. Furthermore, sampling along the external shell surface increases the probability of mixing layers that did not form coevally (i.e., time averaging) because in adult Pinnids shell length and thickness increase slowly by deposition of long, thin sheets of new material [ Yonge , 1953].…”

Section: Discussionmentioning

confidence: 99%

Ecological information and water mass properties in the Mediterranean recorded by stable isotope ratios inPinna nobilisshells

et al. 2011

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18 O values than the specimen from 30 m, likely reflecting differences in salinity. The specimens from 30 m recorded d13 C values less positive than the specimens from 16 m, which we interpreted as an ontogenetic effect observed in previous studies. Estimated calcification temperatures were offset relative to measured water temperature by ∼6.1°C (∼1.4‰). This finding is evident in earlier proxy studies of P. nobilis, although it was not discussed in those studies. Using the seasonal pattern of d 18 O and d 13 C values, we demonstrated that nacre tongues are deposited annually and that their formation is independent of temperature. Food availability rather than temperature may control nacre tongue formation. An alternative explanation for nacre tongue formation is gonad maturation during spring. Our findings support the idea that sclerochronology in P. nobilis can be used to reconstruct environmental, ecological, and climate archives of the Mediterranean.

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Section: Discussionmentioning

confidence: 99%

Ecological information and water mass properties in the Mediterranean recorded by stable isotope ratios inPinna nobilisshells

et al. 2011

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“…Several authors have proposed different methods to estimate growth parameters from empty shells of the congeneric species P. nobilis (Moreteau & Vicente, 1982;Richardson et al, 1999Richardson et al, , 2004. Recently, some authors reviewed previous methods and proposed a new method to study age and estimate growth parameters using the inner record of posterior adductor muscle scars (PAMS) (García-March & Márquez-Aliaga, 2007;García-March et al, 2008;García-March et al, 2011). Due to the phylogenetic proximity between P. nobilis and P. rudis (Lemer et al, 2014) and the shell shape similarities, it can be assumed that the formation process of the inner record and annual posterior adductor muscle scars (PAMS) observed is similar for these congeneric bivalves (García-March et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Population Structure and Growth of the Threatened Pen Shell, Pinna rudis (Linnaeus, 1758) in a Western Mediterranean Marine Protected Area

et al. 2016

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Coastal ecosystems are being extensively degraded by human activities. Benthic, slow-growing and long-lived species are highly vulnerable to these impacts. Marine protected areas might avoid biodiversity losses through habitat protection. The pen shell Pinna rudis is a protected species, but scarce data are available on its ecology and biology. The present study is a comprehensive ecological study encompassing several unknown aspects of the growth and inner record in relation to habitat types, density and size distribution. A total of 418 strip transects were conducted by scuba diving in the Marine Protected Area of Cabrera National Park (39.14° N, 2.96° E), during the summers of 2011, 2012 and 2013. Sampling was conducted across different habitats and depths exploring 152,146.35 m2 in total. Densities varied spatially within the park (from 0 to 6.89 ind./100 m2) corresponding to a wide range of sizes and ages. Most pen shells were patchily distributed and mainly concentrated in caves. Two hotspots with high densities represent the highest densities ever recorded worldwide, showing a possible link to high larval accumulation and settlement. The population size structure showed a unimodal distribution with shell width ranging from 6.2 to 25.0 cm, with an average shell width of 16.0 ± 3.4 cm. The absolute growth was asymptotic, with a maximum age and length of 28-31 years and 45 cm, respectively. This study on the biology and ecology of a well-established population of Pinna rudis in the Western Mediterranean could set a baseline for the conservation of this species in other areas.

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“…The surface of the sample is characterized by large, widely spaced spines and rows of scales. Pinnoidea live partially buried to one third of their length in sediment 47 . Therefore, part of the spines on the surface can be abraded and absent in the anterior portion of the shell.…”

Section: Appendix a Morphology Of A Typical Pinna Nobilis Shellmentioning

confidence: 99%

Ribs of Pinna nobilis shell induce unexpected microstructural changes that provide unique mechanical properties

Nalepka

Berent

Checa

et al. 2021

Preprint

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The reinforcement function of shell ribs depends not only on their vaulted morphology but also on their microstructure. They are part of the outer layer which, in the case of the Pinna nobilis bivalve, is built from almost monocrystalline calcitic prisms, always oriented perpendicular to the growth surfaces. Originally, prisms and their c-axes follow the radii of rib curvature, becoming oblique to the shell thickness direction. Later, prisms bend to reach the nacre layer perpendicularly, but their c-axes retain the initial orientation. Calcite grains form nonrandom boundaries. Most often, three twin disorientations arise, with two of them observed for the first time. Nano-indentation and impact tests demonstrate that the oblique orientation of c-axes significantly improves the hardness and fracture toughness of prisms. Moreover, compression tests reveal that the rib area achieves a unique strength of 700 MPa. The detection of the specific microstructure formed to toughen the shell is novel.

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The duplivincular ligament of recent Pinna Nobilis L., 1758: further evidence for pterineid ancestry of the Pinnoidea

Cited by 10 publications

References 9 publications

Ecological information and water mass properties in the Mediterranean recorded by stable isotope ratios inPinna nobilisshells

Ecological information and water mass properties in the Mediterranean recorded by stable isotope ratios inPinna nobilisshells

Population Structure and Growth of the Threatened Pen Shell, Pinna rudis (Linnaeus, 1758) in a Western Mediterranean Marine Protected Area

Ribs of Pinna nobilis shell induce unexpected microstructural changes that provide unique mechanical properties

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