Ecology and Evolution of the Freshwater Mussels Unionoida

Bauer, G.; Wächtler, K.

doi:10.1007/978-3-642-56869-5

Cited by 91 publications

(16 citation statements)

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“…These studies were controversial and subsequently ignored by most malacologists (e.g., Boss, 1982;Smith, 2001, Graf andCummings, 2007). Since the beginning of this century, the family Margaritiferidae has been consistently restricted to around 12 species (Smith, 2001;Huff et al, 2004;Graf and Cummings, 2006). Smith (2001), based on morphological characters only, divided the Margaritiferidae into three genera: Pseudunio, Margaritifera, and Margaritanopsis.…”

Section: Taxonomical History Of the Margaritiferidae And Its Diagnostmentioning

confidence: 99%

Expansion and systematics redefinition of the most threatened freshwater mussel family, the Margaritiferidae

Lopes‐Lima

Bolotov

et al. 2018

Molecular Phylogenetics and Evolution

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Two Unionida (freshwater mussel) families are present in the Northern Hemisphere; the Margaritiferidae, representing the most threatened of unionid families, and the Unionidae, which include several genera of unresolved taxonomic placement. The recent reassignment of the poorly studied Lamprotula rochechouartii from the Unionidae to the Margaritiferidae motivated a new search for other potential species of margaritiferids from members of Gibbosula and Lamprotula. Based on molecular and morphological analyses conducted on newly collected specimens from Vietnam, we here assign Gibbosula crassa to the Margaritiferidae. Additionally, we reanalyzed all diagnostic characteristics of the Margaritiferidae and examined museum specimens of Lamprotula and Gibbosula. As a result, two additional species are also moved to the Margaritiferidae, i.e. Gibbosula confragosa and Gibbosula polysticta. We performed a robust five marker phylogeny with all available margaritiferid species and discuss the taxonomy within the family. The present phylogeny reveals the division of Margaritiferidae into four ancient clades with distinct morphological, biogeographical and ecological characteristics that justify the division of the Margaritiferidae into two subfamilies (Gibbosulinae and Margaritiferinae) and four genera (Gibbosula, Cumberlandia, Margaritifera, and Pseudunio). The systematics of the Margaritiferidae family is re-defined as well as their distribution, potential origin and main biogeographic patterns.

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Section: Taxonomical History Of the Margaritiferidae And Its Diagnostmentioning

confidence: 99%

Expansion and systematics redefinition of the most threatened freshwater mussel family, the Margaritiferidae

Lopes‐Lima

Bolotov

et al. 2018

Molecular Phylogenetics and Evolution

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“…Females hold a very large number of eggs (several millions) that are fertilized by males releasing sperm upstream of the females (Bauer, 1987). Given that the sperm of freshwater mussels can be transported efficiently by the water current and may survive for extended periods (Jansen, Bauer, & Zahner-Meike, 2001;Mosley et al, 2014), several hundred males were potentially within reach of transferring sperm to each female collected in our study. Our results show that either (a) sires of each brood had released sperm within a short time window before fertilization, that (b) females are able to store sperm or that (c) the eggs of one female can be fertilized over an extended period.…”

Section: Multiple Paternitymentioning

confidence: 99%

“…In the present study, we quantified multiple paternity in a natural population of the freshwater pearl mussel (Margaritifera margaritifera; Figure 1). As with many species of freshwater mussels (Unionidae), M. margaritifera has recently experienced dramatic declines across its holartic range (Lopes-Lima et al, 2017;Young, Cosgrove, & Hastie, 2001). Many of the remaining populations are today small and exhibit little to no recruitment (Lopes-Lima et al, 2017;Young et al, 2001).…”

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confidence: 99%

“…As with many species of freshwater mussels (Unionidae), M. margaritifera has recently experienced dramatic declines across its holartic range (Lopes-Lima et al, 2017;Young, Cosgrove, & Hastie, 2001). Many of the remaining populations are today small and exhibit little to no recruitment (Lopes-Lima et al, 2017;Young et al, 2001). Greater understanding of the reproductive biology could aid in the conservation and management of remaining freshwater pearl mussel populations (Ferguson, Blum, Raymer, Eackles, & Krane, 2013).…”

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confidence: 99%

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High levels of multiple paternity in a spermcast mating freshwater mussel

Wacker

Larsen

Jakobsen

et al. 2018

Ecology and Evolution

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Multiple paternity is an important characteristic of the genetic mating system and common across a wide range of taxa. Multiple paternity can increase within‐population genotypic diversity, allowing selection to act on a wider spectre of genotypes, and potentially increasing effective population size. While the genetic mating system has been studied in many species with active mating behavior, little is known about multiple paternity in sessile species releasing gametes into the water. In freshwater mussels, males release sperm into the water, while eggs are retained and fertilized inside the female (spermcast mating). Mature parasitic glochidia are released into the water and attach to the gills of fish where they are encapsulated until settling in the bottom substrate. We used 15 microsatellite markers to detect multiple paternity in a wild population of the freshwater pearl mussel (Margaritifera margaritifera). We found multiple paternity in all clutches for which more than two offspring were genotyped, and numbers of sires were extremely high. Thirty‐two sires had contributed to the largest clutch (43 offspring sampled). This study provides the first evidence of multiple paternity in the freshwater pearl mussel, a species that has experienced dramatic declines across Europe. Previous studies on other species of freshwater mussels have detected much lower numbers of sires. Multiple paternity in freshwater pearl mussels may be central for maintaining genetic variability in small and fragmented populations and for their potential to recover after habitat restoration and may also be important in the evolutionary arms race with their fish host with a much shorter generation time.

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“…Therefore, to confirm the validity of P. l. fellmanni these data need to be included. Finally, based on a comprehensive comparative morphological and anatomical study, P. l. homsensis (Lea, 1865) was properly re-assigned to other family (Margaritiferidae) and is now Margaritifera homsensis (Lea, 1865) (Smith, 2001). As for the remaining four subspecies, no recent data is available, and so the taxonomic status of all these subspecies is still unclear.…”

Section: Introductionmentioning

confidence: 99%

Phylogeny, phylogeography, and evolution in the Mediterranean region: News from a freshwater mussel (Potomida, Unionida)

Froufe

Prié

Faria

et al. 2016

Molecular Phylogenetics and Evolution

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a b s t r a c tThe Potomida genus (Bivalvia, Unionida) has a Circum-Mediterranean distribution and like other freshwater mussel species, its populations have suffered dramatic declines. Although this genus is currently considered as monotypic, it has a long history of taxonomic revisions and presently many aspects of its systematics and evolutionary history are unclear. We sampled a total of 323 individuals from 39 different sites across the Potomida genus distribution, and sequenced two mitochondrial (16S rDNA and Cytochrome c Oxidase Subunit I) and one nuclear (28S rDNA) genes to clarify its phylogeny and phylogeographic history. Our results show that the genus includes two well-supported clades, one comprising solely the western Mediterranean species Potomida littoralis, and the other including two eastern Mediterranean species, the Greek endemic P. acarnanica and the Anatolian and Middle Eastern P. semirugata. We suggest that Potomida started radiating during the upper Miocene, and that both vicariance and dispersal events shaped the diversification and distribution of the genus along the Mediterranean region. P. littoralis is further divided in two mitochondrial lineages, one restricted to Europe and the other occurring mostly in North Africa. Moreover, some European basins present both lineages in sympatry. The conservation status of the three recognized species should be reevaluated, particularly P. acarnanica, since it is restricted to two Greek river basins presenting a high risk of extinction. Overall, our results clarify some important gaps in knowledge concerning the phylogeny, phylogeography and evolution of the Potomida genus in the Mediterranean region with important taxonomical, ecological and conservational implications.

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Ecology and Evolution of the Freshwater Mussels Unionoida

Cited by 91 publications

References 0 publications

Expansion and systematics redefinition of the most threatened freshwater mussel family, the Margaritiferidae

Expansion and systematics redefinition of the most threatened freshwater mussel family, the Margaritiferidae

High levels of multiple paternity in a spermcast mating freshwater mussel

Phylogeny, phylogeography, and evolution in the Mediterranean region: News from a freshwater mussel (Potomida, Unionida)

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