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Figure 16 in Palaeoheterodont diversity (Mollusca: Trigonioida + Unionoida): what we know and what we wish we knew about freshwater mussel evolution

Figure 16. Representatives of the Mycetopodidae. A, Anodontites trigonus FMNH 21479. B, Monocondylaea minuana UMMZ 248904. C, Leila blainvilliana (Lea, 1834) ANSP 41827. D, Mycetopoda pittieri Marshall, 1927 INHS 14870.

Figure 6. Palaeoheterodont hinges. A in Palaeoheterodont diversity (Mollusca: Trigonioida + Unionoida): what we know and what we wish we knew about freshwater mussel evolution

Figure 6. Palaeoheterodont hinges. A, Neotrigonia pectinata (Lamarck, 1819) ANSP 71515. B, Lamellidens marginalis (Lamarck, 1819) ANSP 41775. C, Fusconaia ebena (Lea, 1831) ANSP 188259. D, Aspatharia chaiziana (Rang, 1835) ANSP 41813. E, Pleiodon ovata (Swainson, 1823) UMMZ 112006.

Figure 14 in Palaeoheterodont diversity (Mollusca: Trigonioida + Unionoida): what we know and what we wish we knew about freshwater mussel evolution

Figure 14. Representatives of the Etheriidae. A, Etheria elliptica MCZ 293466. B, Acostaea rivolii UMMZ 23485. C, Pseudomulleria dalyi UMMZ 112658.

Figure 13 in Palaeoheterodont diversity (Mollusca: Trigonioida + Unionoida): what we know and what we wish we knew about freshwater mussel evolution

Figure 13. Representatives of the Hyriidae. A, Diplodon rotundus (Spix & Wagner, 1827) (+ D. deceptus fide Parodiz, 1968) UMMZ 111283. B, Diplodon chilensis BMNH uncat. C, Prisodon obliquus Schumacher, 1817 UMMZ 110938. D, Castalia ambigua (Lamarck, 1819) FMNH 67901. E, Hyridella australis MCZ 89361. F, Lortiella froggattii Iredale, 1934 FMNH 115329.

Figure 1 in Palaeoheterodont diversity (Mollusca: Trigonioida + Unionoida): what we know and what we wish we knew about freshwater mussel evolution

Figure 1. Taxonomic and geographical diversity of the Unionoida. Data summarized from Table 1. A, Taxonomic partitions of the Unionoida. Separate wedges represent the two superfamilies discussed in the text: Unionoidea and Etherioidea. B, Geographical distribution of the Unionoida. The smaller wedge represents the southern continents: South America, Africa, and Australasia.

Fig. 5. Namkongnaia lemeslei gen. et comb. nov. A. Labels associated with the syntype lot. B in Molecular phylogeny reveals a new genus of freshwater mussels from the Mekong River Basin (Bivalvia: Unionidae)

Fig. 5. Namkongnaia lemeslei gen. et comb. nov. A. Labels associated with the syntype lot. B. Original figure (after Morelet 1875: pl. 14 fig. 1). C–D. Syntype MNHN MP 3150 (photographs by V. Heros and M. Caballer) from Battambang Province, Cambodia. E. Specimen MUMNH-UNI2669. F. Specimen MUMNH-UNI2829 from Kampong Kdei River, Siem Reap Province, Cambodia. Scale bars: 10 mm.

Fig. 2 in Molecular phylogeny reveals a new genus of freshwater mussels from the Mekong River Basin (Bivalvia: Unionidae)

Fig. 2. Time-calibrated tree of the subfamily Gonideinae based on the concatenated alignment dataset of COI + 16S + 28S genes. Nodes present time estimates since the most recent common ancestor (tMRCA) in millions of years ago (Mya). Node bars indicate 95% highest posterior density interval (HPD) of the node ages. Sufficiently supported nodes (BPP> 0.95) are marked with '*'. The geologic time scale is according to the Geological Society of America, 2019.

Fig. 1 in Molecular phylogeny reveals a new genus of freshwater mussels from the Mekong River Basin (Bivalvia: Unionidae)

Fig. 1. Maximum likelihood (ML) tree of the subfamily Gonideinae based on the concatenated dataset of COI + 16S + 28S genes. Bootstrap values from ML and posterior probabilities from Bayesian inference analysis (BI) of the major nodes are listed as ML/BI. Nodes with posterior probabilities of BI ≥ 0.95 and ML bootstrap support values ≥ 70 were considered as sufficiently supported nodes (Huelsenbeck & Hillis 1993; Larget & Simon 1999), and are marked with black circles (supported by both BI and ML), white circles (supported only by BI), or grey circles (supported only by ML).

Fig. 3 in Molecular phylogeny reveals a new genus of freshwater mussels from the Mekong River Basin (Bivalvia: Unionidae)

Fig. 3. Map showing distribution localities of Namkongnaia gen. nov. Boundaries of river basins follow Abell et al. (2008).

publicDec 2023View details →

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U.S. freshwater mussel occurrence data

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Data from: Growth and longevity of the endangered freshwater pearl mussel (Margaritifera margaritifera): Implications for conservation and management

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publicJun 2024View details →

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Parasitism dramatically alters the ecosystem services provided by freshwater mussels

Parasites can indirectly affect ecosystem function by altering host phenotype, but the trait-mediated impacts of parasitism at an ecosystem level remain poorly characterised. However, understanding the influence of parasites is central to understanding the ecosystem services provided by host species, especially in an era of global environmental change. We examined the effect of native (the trematode Rhipidocotyle campanula) and invasive (the bitterling fish Rhodeus amarus) parasites, and their interaction, on the clearance rates of unionid mussels, a dominant ecosystem-engineering group that modifies freshwater ecosystems worldwide. We used a combination of field experiments, laboratory experiments, and ecological simulations to demonstrate the phenotypic impact of parasites on the functional response of two mussel species across an environmental gradient (suspended particle concentration), and extended this with host and parasite community data to demonstrate the consequences for a real-world ecosystem, the Old West River in Cambridgeshire, England. Both parasites altered the clearance rates of their hosts but in contrasting fashion: while R. campanula increased host clearance rates relative to uninfected conspecifics under all conditions, R. amarus suppressed clearance rates at high suspended particle concentrations (eutrophic conditions) but elevated them otherwise. The parasites displayed different infection patterns in the two host species, and the invasive R. amarus rarely co-infects mussels with R. campanula. Given their disparate effects, the parasites' distributions reversed the relative filtration capacity of the two host species under high vs. low concentrations of suspended particles, demonstrating how differences between the infection patterns of native and invasive parasites, as well as their individual effects, need to be considered. Overall, the proportion of daily river discharge filtered by the combined mussel community changed by up to 96% in the presence of parasites. By incorporating multiple host species and multiple parasite species, we provide ecologically relevant evidence for the trait-mediated effects of parasites on ecosystem processes. Our study demonstrates that parasitism can significantly alter wider ecosystem processes by changing the phenotype of their host. Future work on ecosystem function should take parasitism into account, and consider both trait-mediated and density-mediated effects.

opencc-zeroMay 2022View details →

opencc-zeroApr 2024View details →

Dataset: Stable oxygen and carbon isotopes in freshwater pearl mussels from ultrastructurally distinct shell portions

Oxygen isotopes in stream water can serve as natural tracers of watershed dynamics. Freshwater pearl mussels provide δ18Owater estimates that overcome temporal and spatial limitations of instrumental records. The reliability of shell‑based δ18Owater reconstructions depends on understanding which shell layer biomineralizes closer to oxygen isotopic equilibrium with ambient water. This dataset contains isotope data obtained from freshwater pearl mussel shells, as discussed in the article titled "Biologically driven isotope fractionation in ultrastructurally different shell portions of freshwater pearl mussels (Margaritifera margaritifera): Implications for stream water δ18O reconstructions". The dataset includes δ18O and δ13C values from field-collected and tank-reared bivalve shells, complemented by in-situ δ18Owater measurements from the tanks and shell growth rates of the tank-reared specimens.

opencc-by-4.0Mar 2018View details →

Effects of the Invasive Freshwater Mussel Limnoperna fortunei on Sediment Properties and Accumulation Rates

Environmental data and results of an experiment conducted in the vicinity of the Río de la Plata Estuary (Argentina), aimed at assessing the influence of the invasive mussel Limnoperna fortunei on sediment properties and accumulation rates. In the experiment, eighteen 20 L flow-through experimental units with and without mussels were used monitoring where changes in the mass and characteristics of the sediments accumulated throughout a yearly cycle in monthly, biannual and annual intervals.

Figure 5 in Structural and biological characterization of two freshwater mussel shells (Bivalvia: Unionidae)

Figure 5. SEM image of the nacreous layer of the shells of (A) P. semirugata and (B) L. wheatleyi.

Figure 6 in Structural and biological characterization of two freshwater mussel shells (Bivalvia: Unionidae)

Figure 6. The growth front of the nacre of (A) P. semirugata and (B) L. wheatleyi.

Figure 2 in Structural and biological characterization of two freshwater mussel shells (Bivalvia: Unionidae)

Figure 2. (A) Potomida semirugata and (B) Leguminaia wheatleyi.

Figure 1 in Structural and biological characterization of two freshwater mussel shells (Bivalvia: Unionidae)

Figure 1. Study area.

opencc-by-4.0Sep 2024View details →

RAD-seq generated single nucleotide polymorphisms resolve patterns of genetic diversity and structure of the freshwater mussel Ptychobranchus fasciolaris in glaciated and unglaciated regions of North America

Included are the initial unfiltered SNP output from the STACKS pipeline, and the final filtered SNP dataset in VCF format used to do analysis in the manuscript titled "RAD-seq generated single nucleotide polymorphisms resolve patterns of genetic diversity and structure of the freshwater mussel Ptychobranchus fasciolaris in glaciated and unglaciated regions of North America" which was submitted to Hydrobiologia in September 2024.