First record of Pisidium subtruncatum Malm, 1855 (Bivalvia, Sphaeriidae) in an African cave

Rassam, Hanane; Moutaouakil, Soumia; Benaissa, Hassan; Albrecht, Christian; Ghamizi, Mohamed

doi:10.3897/subtbiol.34.50916

Cited by 4 publications

(2 citation statements)

References 13 publications

(13 reference statements)

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“…Freshwater Mollusk Biology andConservation 27:16-26, 2024 Ó Freshwater Mollusk Conservation Society 2024 DOI:10.31931/fmbc-d-23-00003 sphaeriid species (Schultheiß et al 2008;Clewing et al 2013;Bößneck et al 2016;Groh et al 2020) while providing a better understanding of species distributions (Rassam et al 2020).…”

Section: Species Richness and Distribution Of Sphaeriidae Surveyed Wi...mentioning

confidence: 99%

Species Richness and Distribution of Sphaeriidae Surveyed with Environmental DNA Metabarcoding

Marshall,

Klymus,

Stepien

2024

Freshwater Mollusk Biology and Conservation

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Section: Species Richness and Distribution Of Sphaeriidae Surveyed Wi...mentioning

confidence: 99%

Species Richness and Distribution of Sphaeriidae Surveyed with Environmental DNA Metabarcoding

Marshall,

Klymus,

Stepien

2024

Freshwater Mollusk Biology and Conservation

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“…Although bivalve mollusks are commonly found in both saltwater and freshwater environments, only a very limited number of species have so far been described in subterranean cave systems. While it has not yet been ascertained whether some species belonging to the family Sphaeriidae, occasionally found in caves [5,6], can actually be considered stygobionts (i.e., adapted to caves and restricted to underground waters) or stygophiles (i.e., inhabiting caves and completing their entire life cycle there, but also occurring in surface habitats), until 2022, the only known species of obligate cavedwelling bivalves belonged to the genus Congeria Bole 1962. However, Eupera troglobia, living in the Casa da Pedra cave (northern Brazil), has been recently recognized as the first stygobiont bivalve species living on the American continent [7].…”

Section: Introductionmentioning

confidence: 99%

Variation of Gene Expression in the Endemic Dinaric Karst Cave-Dwelling Bivalve Mollusk Congeria kusceri during the Summer Season

Scapolatiello,

Manfrin,

Greco

et al. 2023

Diversity

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The cave systems of the Neretva River basin in the Dinaric Karst are home to Congeria kusceri, one of the very few known examples of stygobiotic bivalve mollusks, which displays several unique life history traits and adaptations that allowed its adaptation to the subterranean environment. This endemic species is undergoing rapid decline, most likely linked with habitat degradation, which might seriously threaten its survival in the next few decades. Unfortunately, the urgent need for effective conservation efforts is hampered by the lack of effective regulations aimed at preserving remnant populations as well as by our limited knowledge of the biology of this species. Although the precise factors underlying the disappearance of C. kusceri from its type locations are not entirely clear, the alteration of seasonal changes in water temperatures and alkalinity is most likely involved, as these are the main drivers of shell growth, spawning, and the onset and progression of the new gametogenic cycle. While these aspects have so far only been studied using morphological and physiological observations, future conservation efforts would certainly benefit from an integrated multidisciplinary approach. Here, using RNA-sequencing, we provide an overview of the modulation of gene expression recorded in five key tissues (the mantle, gonads, gills, adductor muscle, and digestive gland) between early June and late September. We highlight the presence of markedly tissue-specific responses, with the most dramatic changes affecting the gonads, mantle, and gills. We further identified a drastic switch in the use of energy budgets between the two periods, with evidence of ongoing shell growth and high metabolic activity in the mantle and gills at the early time point, followed by a massive redirection of all available energy to the gonads for the generation of new gamete primordia in early autumn.

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Species diversity and DNA barcode library of freshwater Molluscs of South Caucasus

Bikashvili¹,

Kachlishvili²,

Japoshvili³

et al. 2022

BDJ

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This study provides the first attempt to investigate the molecular diversity of South Caucasian freshwater molluscs (Mollusca, Gastropoda) and lay down the first bricks to build up a DNA-barcode library. In total, 289 COI barcode sequences were obtained from 33 morpho-species belonging to 24 molluscan genera and 10 families that represent nearly 30% of known freshwater molluscan diversity of the South Caucasus region. DNA barcodes were analysed by means of the Barcode Index Number (BIN) and the other tools available in BOLD Systems. Results showed that the knowledge of freshwater molluscs diversity in the South Caucasus is far from comprehensive. For the studied 33 morpho-species, 289 barcodes were clustered into 40 BINs, from which unique BINs were defined for 12 species and five species were characterised with more than a single BIN. From the studied taxa, 60% were characterised larger than 2.2% sequence divergence indicating high genetic variation or cryptic diversity. Within our limited taxonomic coverage, we found one new species for the Republic of Georgia (Galba schirazensis) and at least three undescribed species belonging to the genera Stagnicola, Segmentina and Anisus. Uniqueness and high molecular diversity of the studied species emphasise the need for further intensive morphological and molecular investigations of the South Caucasian freshwater molluscan fauna.

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First record of Pisidium subtruncatum Malm, 1855 (Bivalvia, Sphaeriidae) in an African cave

Cited by 4 publications

References 13 publications

Species Richness and Distribution of Sphaeriidae Surveyed with Environmental DNA Metabarcoding

Species Richness and Distribution of Sphaeriidae Surveyed with Environmental DNA Metabarcoding

Variation of Gene Expression in the Endemic Dinaric Karst Cave-Dwelling Bivalve Mollusk Congeria kusceri during the Summer Season

Species diversity and DNA barcode library of freshwater Molluscs of South Caucasus

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