Vicariant versus dispersal processes in the settlement of<i>Pseudamnicola</i>(Caenogastropoda, Hydrobiidae) in the Mediterranean Balearic Islands

Delicado, Diana; Machordom, Annie; Ramos, Marian A.

doi:10.1111/zoj.12124

Cited by 25 publications

(30 citation statements)

References 73 publications

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“…However, our findings indicated that peninsular ecoregions, which are supposed to be geographically isolated and species poor, are actually as diverse as nonpeninsular ecoregions. The peninsula effect may have been counteracted by past colonisation of the southern peninsulas during glacial episodes (as mentioned above) and long‐distance dispersal by birds, which has also been suggested to play an important role in the geographic distribution of certain hydrobiid species (Delicado, Machordom, & Ramos, ; Haase et al., ; Szarowska, Osikowski, Hofman, & Falniowski, ). The importance of historical factors is also reflected in the variation of species richness found among biogeographic realms (Figure ).…”

Section: Discussionmentioning

confidence: 99%

Global species richness of hydrobiid snails determined by climate and evolutionary history

et al. 2018

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Efforts to describe spatial patterns of freshwater diversity and to evaluate their underlying factors have traditionally been focused on some animal groups (e.g. amphibians, fish or dragonflies). Despite being a dominant component in continental aquatic ecosystems and crucial for determining priority areas for conservation, broad‐scale data on gastropod total species, endemic and threatened species richness are limited. Based on these biodiversity indices, we identify global hotspots, extinction risk along the elevational gradient and the drivers of species richness patterns in the largest group of freshwater gastropods, the family Hydrobiidae. Given the strong dependency to a nonmarine aquatic environment, the observed richness patterns of extant hydrobiid species could be significantly influenced by large‐scale geography and dispersal processes as well as climatic conditions affecting continental ecosystems. Therefore, we tested several predictions for species richness derived from ecological and evolutionary hypotheses postulated for other freshwater groups. Based on a comprehensive literature and biodiversity database review, we compiled the number of total, endemic and threatened species per freshwater ecoregion. We classified ecoregions as hotspots if each biodiversity index was in the top 25% of its range and assessed the effect of 13 environmental and evolutionary factors on species richness using generalised linear models. We identified 906 species and 157 genera of Hydrobiidae showing mainly a Nearctic–Palearctic distribution and 19 biodiversity hotspots, most located across the Mediterranean Basin. In our data set, 83% of the species were endemic to a single ecoregion. Of the 43% non‐data deficient species, we found almost three times more threatened than non‐threatened species, and extinction risk peaked at 1,500 m a.s.l. Species richness was unequally distributed over biogeographic realms, increased with higher connectivity among ecoregions, and was negatively related with annual temperature range. Latitude and precipitation seasonality explained part of the richness variation by a nonlinear relationship. The identified hotspots correspond with those of other freshwater taxa. The hump‐shaped relationship of extinction risk with elevation is likely the consequence of decreasing natural and anthropogenic perturbations at higher elevations. Global hotspots of Hydrobiidae richness represent areas of climatic stability with medium precipitation and temperature seasonality that are well connected with other hydrological basins. Our results illustrate that both evolutionary and environmental factors determine these global patterns and that future changes of the latter factors may affect hydrobiid richness.

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Section: Discussionmentioning

confidence: 99%

Global species richness of hydrobiid snails determined by climate and evolutionary history

et al. 2018

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“…Notwithstanding, this would need confirmation through more comprehensive sampling of the area and examining other potential new representatives of this lineage. As more shared synapomorphies with the pyrgulinid group were detected (such as a tapered penis, zero to two seminal receptacles, zero to three pairs of basal cusps in the central radular tooth and spiral keels on the shell, see Radoman 1955Radoman , 1983 than with Pseudamnicola (diagnosed by, one elongate seminal receptacle, one pair of basal cusps in the central radular tooth, triangular penis with folds and simple shells slightly longer than wide, of which the latter two are not present in Pyrgulinae, see Boeters 1988;Szarowska et al 2009;Delicado et al 2014), we tentatively consider these taxa as belonging to the subfamily Pyrgulinae.…”

Section: Discussionmentioning

confidence: 99%

“…Pseudamnicola species, like most hydrobiids, are characterized by a minute, unsculpted shell and simple penis, such that only comprehensive studies including the description of several anatomical structures and molecular data have been able to distinguish among congeners (Hershler & Ponder 1998;Wilke et al 2001;Arconada & Ramos 2003;Strong et al 2008). Morphological and molecular data may offer varying resolution in cases of cryptic species (Wilke et al 2002;Liu et al 2003; or when high morphological disparity exists among close related taxa (Wilke et al 2007;Delicado et al 2014). Thus, unraveling the systematics of the hydrobiids family calls for an integrative approach.…”

Section: Introductionmentioning

confidence: 99%

Unraveling a new lineage of Hydrobiidae genera (Caenogastropoda: Truncatelloidea) from the Ponto-Caspian region

Delicado

Pešić

Glöer

2016

EJT

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Abstract. Phylogenetic analyses of the highly diverse (non-marine aquatic) gastropod family Hydrobiidae Stimpson, 1865 have revealed seven main lineages, most of which represent subfamilies. The subfamily Pseudamnicolinae Radoman, 1977, and specifically the genus Pseudamnicola Paulucci, 1878 (mainly inhabiting western and central Mediterranean regions), contributes substantially to this hydrobiid richness. Most of its congeners have been described in terms of their shell and penis features, which are of limited diagnostic value. Hence, the taxonomic status of some Pseudamnicola species needs to be revised, particularly of those inhabiting marginal regions, such as the Ponto-Caspian domain, largely occupied by the subfamily Pyrgulinae Brusina, 1882. Here we present a molecular phylogeny including species of both subfamilies along with extended morphological descriptions to confirm assignments of the Iranian species Pseudamnicola zagrosensis Glöer & Pešić, 2009; Sarkia kermanshahensis Glöer & Pešić, 2009 (originally within Pseudamnicola) and P. saboori Glöer & Pešić, 2009. Our COI-based tree rejects these assignments suggesting a new potential lineage, sister to the pyrgulinid species, and comprising three genera: Shadinia Akramowski, 1976, Intermaria gen. nov. and Persipyrgula gen. nov. These genera differ molecularly by 3.6%-8.5%, and are diagnosable by penis, female genitalia and radula features. Our findings evidence the high morphological variability of pyrgulinid species and provide insight into the origins and evolution of the freshwater Ponto-Caspian fauna.

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“…The second Miocene land connection is considered by many authors to be one of the main events driving local diversification in the Mediterranean, and this event has been dated to the Messinian salinity crisis (MSC; 5.96–5.33 Ma), when closure of the Strait of Gibraltar led to desiccation of the Mediterranean Basin (Hsü et al ., ; Krijgsman et al ., ). During this dry period, a colonization event from the mainland to the Balearic Islands took place (Fromhage et al ., ; Lalueza‐Fox et al ., ; Delicado et al ., ). The refilling of the Mediterranean Basin following the MSC restored the isolation of the Balearic Islands.…”

Section: Introductionmentioning

confidence: 97%

Biogeography of the land snail genus Allognathus (Helicidae): middle Miocene colonization of the Balearic Islands

Chueca

Madeira

Gómez‐Moliner

2015

Journal of Biogeography

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Aim We infer the evolutionary history of the land snail genus Allognathus from a molecular phylogeny. An approximate temporal framework for its colonization of the Balearic Islands and diversification within the archipelago is provided according to palaeogeographical events in the western Mediterranean Basin.Location The Balearic Islands, Western Mediterranean.Methods A 2461-bp DNA sequence dataset was generated from one nuclear and two mitochondrial gene fragments in 87 specimens, covering all nominal taxa of the genus Allognathus. Through maximum-likelihood and Bayesian phylogenetic methods along with a Bayesian molecular clock, we examined the evolutionary history of the group. Ancestral distribution ranges were estimated for divergence events across the tree using a Bayesian approach. We also used genetic species-delimitation models to determine the taxonomy of Allognathus.Results We provided the first molecular phylogeny of Allognathus, a genus endemic to the Balearic Islands. The origin of the genus in the Balearic Islands was dated to the middle Miocene based on palaeogeographical events in the Western Mediterranean. During the late Miocene and Pliocene, several diversification events occurred within the archipelago. The ancestral range of Allognathus was reconstructed as the north-eastern Tramuntana Mountains of Mallorca.Main conclusions Three species were delimited within the genus, one of which has at least five subspecies. The phylogenetic reconstruction showed a high degree of parallelism between the divergence of the main Allognathus lineages and the palaeogeography of the Balearic Islands. The genus appears to have colonized Mallorca from the south-east of the Iberian Peninsula during the middle Miocene. Sea level fluctuations that took place in the Western Mediterranean from the Messinian to the present are consistent with the diversification and secondary contacts of the phylogroups of Allognathus, as well as their distribution ranges. The middle Miocene could have been a period for the colonization of the Balearic Islands by other terrestrial organisms.

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Vicariant versus dispersal processes in the settlement ofPseudamnicola(Caenogastropoda, Hydrobiidae) in the Mediterranean Balearic Islands

Cited by 25 publications

References 73 publications

Global species richness of hydrobiid snails determined by climate and evolutionary history

Global species richness of hydrobiid snails determined by climate and evolutionary history

Unraveling a new lineage of Hydrobiidae genera (Caenogastropoda: Truncatelloidea) from the Ponto-Caspian region

Biogeography of the land snail genus Allognathus (Helicidae): middle Miocene colonization of the Balearic Islands

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