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opencc-by-4.0Oct 2017View details →

Fig. 2 in Thyasirid bivalves from Cretaceous and Paleogene cold seeps

Fig. 2. Geological ages of the fossil seep localities bearing thyasirids examined in this study.

opencc-by-4.0May 2010View details →

Fig. 10 in Ecophenotypic plasticity versus evolutionary trends-morphological variability in Upper Jurassic bivalve shells from Portugal

Fig. 10. Box plot of rib numbers in Arcomytilus. Numbers in squared brackets refer to Fig. 2.

opennotspecifiedAug 2024View details →

McClain Bivalve Sizes

Compiled literature dataset, Craig McClain, shell length and height for bivalves, with habitat and locality.   Compiled literature dataset, Craig McClain, shell length and height for bivalves, with habitat and locality.

opencc-by-4.0Sep 2024View details →

Predictors of outplanted marine bivalve survival in restoration: a review and synthesis

Global declines in marine shellfish have resulted in widespread efforts to restore populations. Previous research has predominantly focused on substrate-limited rather than recruitment-limited systems, yet given increased use of aquaculture-produced stock to restore marine bivalves, there is a need to understand differences in the survival of hatchery-produced and translocated wild stock. We conducted a systematic review and synthesis of studies that quantified the survival of outplanted marine bivalves. The systematic review identified 893 unique stocking events across 111 studies for 29 species across 10 families. Most research has occurred in temperate regions (73%), across four bivalve families (Ostreidae 37%, Pectinidae 20%, Veneridae 16%, and Mytilidae 11%). More stockings have outplanted hatchery-produced (66%) than translocated stock (34%). We conducted quantitative analyses for five species to determine how stock origin, size at outplant, outplant density, substrate co-deployment, predator exclusion, and time since outplant influences survival. Survival consistently decreased through time across all species. Substrate co-deployment, stock origin, and size at outplant did not influence survival, while predator exclusion and outplant density affected some species. Our analyses broadly demonstrate variability in the survival of outplanted bivalves through time, however predicted survival was poor after two years (<3%). Generally low survival highlights difficulties associated with conducting scalable restoration in recruitment-limited systems. Based on our findings, using hatchery-produced stock, mitigating predation, and outplanting epifaunal bivalves at high densities may increase survival probabilities when outplanting stock for restoration. Further exploration is needed to understand whether use of aquaculture-produced stock results in similar ecosystem structure, function, and service provisioning to natural and restored reefs in recruitment-limited systems.   This data set is in support of the article published with the same title in the Journal of Applied Ecology.

opencc-zeroDec 2002View details →

FIG. 1 in Les associations de bivalves (Mollusca, Bivalvia) du Messinien du bassin de Sorbas (SE Espagne)

FIG. 1. — Localisation géographique du bassin de Sorbas (SE Espagne).

Figure 52 in Galeommatid bivalves from Phuket, Thailand

Figure 52. Ephippodonta (Ephippodonta) gigas. Dorsal view of animal. Scale bar = 5 mm.

Figure 49 in Galeommatid bivalves from Phuket, Thailand

Figure 49. Galeomma phuketi sp. nov. Shell structure seen in transmitted light. Scale bar = 50 Mm.

Figure 39 in Galeommatid bivalves from Phuket, Thailand

Figure 39. Nudiscintilla glabra gen. et sp. nov. Live holotype in dorsal view. Scale bar = 5 mm.

Figure 37 in Galeommatid bivalves from Phuket, Thailand

Figure 37. Scintilla papillosa sp. nov. Live animal seen from the left. Scale bar = 5 mm.

Figure 14 in Galeommatid bivalves from Phuket, Thailand

Figure 14. Live specimen of Scintilla anomala seen from the left. Scale bar = 5 mm.

Figure 10 in Galeommatid bivalves from Phuket, Thailand

Figure 10. Live specimen of Scintilla cuvieri seen from the left. Scale bar = 5 mm.

Figure 23 in Galeommatid bivalves from Phuket, Thailand

Figure 23. Scintilla agilis sp. nov. Dorsal view of live specimen. Scale bar = 5 mm.

Figure 19 in Galeommatid bivalves from Phuket, Thailand

Figure 19. Live specimen of Scintilla nitidella in right side view. Scale bar = 5 mm.

Figure 16 in Galeommatid bivalves from Phuket, Thailand

Figure 16. Live specimen of Scintilla dubia in left side view. Scale bar = 5 mm.

opencc-zeroNov 2022View details →

Data for: Taxonomy and paleobiogeography of rudist bivalves from Upper Cretaceous strata, Gulf Coastal Plain and Puerto Rico, USA

This study provides the first focused investigation of rudist bivalves from the Upper Cretaceous of the Gulf Coastal Plain (GCP) in the southern US and previously undescribed specimens from the Flor de Alba Limestone Member of the Pozas Formation in Puerto Rico. Identified rudists from the GCP comprise the Monopleuridae Munier-Chalmas, 1873, including Gyropleura Douvillé, 1887, as well as Radiolitidae d'Orbigny, 1847, including Biradiolites cardenasensis Böse, 1906, Durania Douvillé, 1908, Durania maxima (Logan, 1898), Radiolites Lamarck, 1801, Guanacastea jamaicensis (Trechmann, 1924), Radiolites acutocostata (Adkins, 1930), and Sauvagesia Choffat, 1886. Integrating rudist occurrences within well-established GCP biostratigraphy allows for extension of upper ranges of D. maxima and R. acutocostata into the late Campanian, and lower ranges of B. cardenasensis and G. jamaicensis into the early Campanian. Identified rudists from Puerto Rico comprise the Hippuritidae Gray, 1848, and include Barrettia monilifera Woodward, 1862, which supports the age of the Flor de Alba Limestone Member of the Pozas Formation as middle Campanian. Combined taxonomic, biostratigraphic, and paleobiogeographic analyses indicate there is no rudist fauna endemic to the GCP, and the region marks the northeastern range of the Caribbean genera Biradiolites, Durania, Guanacastea, Gyropleura, Radiolites, and Sauvagesia during the Campanian and Maastrichtian. The new occurrences help inform future updates of Late Cretaceous sea surface current reconstructions for the Caribbean and Western Interior Seaway, USA.

opencc-zeroDec 2022View details →

Data for: Convergence and contingency in the evolution of a specialized mode of life: Multiple origins and high disparity of rock-boring bivalves

Evolutionary adaptation to novel, specialized modes of life is often associated with close mapping of form to function, resulting in narrow morphological disparity. For Bivalvia, endolithy (rock-boring) has biomechanical requirements thought to diverge strongly from those of the ancestral shallow-burrowing habit in soft sediments. However, 3D morphometric data from 73 species among ~94% of extant endolithic genera and families, along with 384 non-endolithic species in those families, show that endolithy has originated at least eight times. Endolithy is evolutionarily accessible from multiple morphological starting points, evidenced by the morphologies of the oldest fossil members of families. Although some endoliths appear to converge on a limited set of shell morphologies, the total range of endolith shell morphologies among the broadest for bivalve life habits, and lacks any unifying morphological trait. Nevertheless, endolithy is a taxon-poor habit today. This limited richness evidently does not derive from damped origination or heightened extinction rates on lineages containing endoliths, and today's endoliths are not confined to low diversity biogeographic regions. Instead, endolithy may be limited by habitat availability. Both determinism (convergence among distantly related taxa) and contingency (endoliths remain close to the disparate morphologies of their source clades) underlie the occupation of endolith morphospace.

opencc-zeroJan 2023View details →

Drilling predation on Early Jurassic bivalves and behavioral patterns of the presumed gastropod predator — evidence from Pliensbachian soft bottom deposits of northern Germany

Drilling predation is a common reason for mortality of benthic molluscs but did not become common until the late Mesozoic. The scarcity of drill holes in the early Mesozoic fossil record limits our understanding of the evolution of drilling behavior and its role on shaping early Mesozoic marine communities. Here, we use drilling traces on several bivalve taxa from the Lower Jurassic (Pliensbachian) marine soft bottom deposits in northern Germany to explore behavioral patterns of the predator (e.g., site selectivity, change in site-selective behaviour with age). Although none of the known drilling gastropod groups existed in the Pliensbachian, including the studied localities, the drill hole morphology suggests that the predator was probably a gastropod. The ecology and identity of the target prey change from a diverse array of epifaunal to infaunal taxa in older deposits to focus on a single large deep infaunal taxon, Gresslya intermedia, in younger deposits, suggesting a potential trend in prey selectivity over time. Spatial point pattern analysis of traces (SPPAT) reveals an aggregated pattern of drill holes on Gresslya, suggesting strong selectivity in drill hole location. Drilling on a single large infaunal taxon and site selectivity are common patterns also inferred previously from the drilled deep infaunal Eothyasira from the Pliensbachian of southern Germany. In addition to the scarcity of predators, the highly specialized behavior of the early drilling predators, including strong prey selectivity in terms of prey identity and life habit, can partly explain the rarity of the early Mesozoic drill holes.

opencc-zeroApr 2023View details →

Data from: Bivalves from the Changhsingian (Upper Permian) Bellerophon Formation of the Dolomites (Italy): ancestors of the Lower Triassic post extinction benthic communities

The diverse shallow marine fossil assemblages from the Changhsingian Bellerophon Formation of the Dolomites record the late Palaeozoic marine life immediately before the end-Permian mass extinction. Here, based on the collection of c. 6500 bivalve specimens from different localities of the western Dolomites, we have taxonomically classified 26 species, including 10 new species, 3 new genera and 1 new family: Acharax frenademezi sp. nov., Bakevellia (Bakevellia) preromangica sp. nov., Edmondia hautmanni sp. nov., Etheripecten stuflesseri sp. nov., Ladinomya fosteri gen. et sp. nov., Lovaralucina covidi gen. et sp. nov., Palaeolima badiotica sp. nov., Promytilus merlai sp. nov., Tambanella? stetteneckensis sp. nov., Volsellina carinata sp. nov., Gardenapecten gen. nov., Ladinomyidae fam. nov. The occurrence of three Eumorphotis species with a different and superimposed stratigraphic distribution led us to propose an upper Permian 'lower Eumorphotis Zone' in contrast to the already known Lower Triassic Eumorphotis Zone which is consequently renamed as 'upper Eumorphotis Zone'. The 'lower Eumorphotis Zone' is divided, in ascending stratigraphic order, into E. praecurrens, E. striatocostata and E. lorigae subzones. A palaeoecological analysis of the bivalves contained in each sampled bed has allowed us to recognize 6 biofacies and 4 ecofacies, based on richness, dominance and ecological lifestyle. The bivalves from Bellerophon Formation inhabited lagoonal to nearshore environments affected by stressed conditions, mostly represented by high temperatures, high salinity, shallow water depths, low oxygen and high terrigenous input. The upper Bellerophon Fm is characterized by increasing fully marine conditions, although the occurrence of eurytopic taxa still suggests stressed marine conditions.

opencc-zeroJun 2023View details →

Data for: Deformable hard tissue with high fatigue resistance in the hinge of bivalve Cristaria plicata

The hinge of bivalve shells can sustain hundreds of thousands of repeating opening-and-closing valve motions throughout their lifetime. We study the hierarchical design of the mineralized tissue in the hinge of bivalve, Cristaria plicata, which endows the tissue with deformability and fatigue resistance, and underlies the repeating motion capability consequently. This folding fan-shaped tissue consists of radially aligned, brittle aragonite nanowires embedded in resilient matrix, and can translate external radial loads to circumferential deformation. The hard-soft complex microstructure can suppress stress concentration within the tissue. Coherent nanotwin boundaries along the longitudinal direction of the nanowires increase their resistance to bending fracture. The unusual biomineral, which exploits the inherent properties of each component through multiscale structural design, provides insights into the evolution of anti-fatigue structural materials.