Phylogenetic relationships of coexisting Heterocypris (Crustacea, Ostracoda) lineages with different reproductive modes from Lampedusa Island (Italy)

Rossi, Valeria; Gandolfi, A.; Baraldi, F.; Bellavere, Carlo; Menozzi, Paolo

doi:10.1016/j.ympev.2007.04.013

Cited by 30 publications

(27 citation statements)

References 55 publications

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“…Available evidence indicates that at least one population of H. barbara on Lampedusa island (namely Vallone della Forbice) includes both sexual and parthenogenetic females and that their relative abundance varies during the rain season (Bellavere et al, 2002;Rossi et al, 2007). Our results will be useful for a baseline evaluation of the role of hatching phenology and population dynamics in determining the coexistence of H. barbara apomictic and amphimictic lineages that we described in Vallone della Forbice (Rossi et al, 2007).…”

Section: Discussionmentioning

confidence: 59%

“…Our results will be useful for a baseline evaluation of the role of hatching phenology and population dynamics in determining the coexistence of H. barbara apomictic and amphimictic lineages that we described in Vallone della Forbice (Rossi et al, 2007). …”

Section: Discussionmentioning

confidence: 94%

“…It hosts an amphimictic population of H. barbara (Rossi et al, 2007). In order to evaluate how conductivity, temperature and photoperiod affect the termination of dormancy, the life cycle and the dynamics of natural amphimictic populations of H. barbara, laboratory microcosms were set up by hydrating sediments from Aria Rossa with 500 ml distilled water in transparent cylindrical uncovered PET containers (8 cm diameter, 18 cm height) (Rossi et al, 2004).…”

Section: Methodsmentioning

confidence: 99%

“…On Lampedusa island (Isole Pelagie, Sicily channel, Italy), both amphimictic and parthenogenetic females of H. barbara were described and both forms coexist in at least one temporary freshwater pond (Rossi et al, 2003(Rossi et al, , 2004(Rossi et al, , 2007. The Mediterranean area has a predictable dry summer, but the rainfall pattern and hence the onset and duration of the wet winter season is highly variable from year to year.…”

Section: Introductionmentioning

confidence: 99%

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Hatching phenology and voltinism of Heterocypris barbara (Crustacea: Ostracoda) from Lampedusa (Sicily, Italy)

2013

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Section: Discussionmentioning

confidence: 59%

Section: Discussionmentioning

confidence: 94%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Hatching phenology and voltinism of Heterocypris barbara (Crustacea: Ostracoda) from Lampedusa (Sicily, Italy)

2013

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“…In southeastern Australia, recent and rapid expansion of parthenogenetic females resulted in the local displacement of sexual lineages of Candonocypris novaezelandiae (Chaplin 1993;Chaplin & Ayre 1997). In H. barbara we have not found significant differences in life history traits between sexual and asexual females that coexist in Lampedusa Island temporary ponds (Rossi et al 2007). Their coexistence is probably due to ecological differentiation: for instance, resting eggs from asexual females hatched later in winter than resting eggs from sexual females (Rossi et al in preparation).…”

Section: Discussionmentioning

confidence: 84%

Inbreeding and outbreeding depression in geographical parthenogensHeterocypris incongruensandEucypris virens(Crustacea: Ostracoda)

Rossi

Menozzi

2012

Italian Journal of Zoology

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Heterocypris incongruens and Eucypris virens are geographic parthenogens inhabiting temporary ponds. Several authors proposed that, after the last glaciation, asexual lineages would spread throughout Europe more efficiently than sexual ones. The range expansion, that followed metapopulation dynamics characterized by genetic bottlenecks and subsequent inbreeding/outbreeding depression, had strong negative fitness consequences in sexuals. Using controlled crosses we estimated inbreeding and outbreeding depression in the sexual populations of H. incongruens and E. virens and compared the experimental reproduction rate in sexual and asexual females of both species. Inbreeding depression varied according to species and fitness components but, in general, was not significantly different between inbred and outbred crosses. In H. incongruens, inbred crosses produced a higher percentage of resting eggs and had higher fecundity than intrapopulation outbred crosses. Reproduction rate in asexuals of both species was about twice that in sexuals. Our data does not support the hypothesis that sexual populations exhibit inbreeding depression in geographic parthenogens. However, outbreeding depression and the lower efficiency of sexuals in establishing new populations may account for the role of metapopulation dynamics in geographic parthenogenesis of both species.

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TheIlyocyprispuzzle: A multidisciplinary approach to the study of phenotypic variability

Mazzini

Gliozzi

Rossetti

et al. 2014

Internat. Rev. Hydrobiol.

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Ilyocypris Brady and Norman () is a widespread freshwater ostracod genus including about 30 living and 190 fossil species. The specific identification of the living Ilyocypris relies mainly on the appendages. An identification exclusively based on valves is rather complicated because of a high intraspecific variability of their characters in several species. This study aims to test the taxonomic significance of the valves characters through the examination of specimens unambiguously identified on the basis of their soft part morphology, in order to provide useful taxonomic criteria for the identification of Ilyocypris shells in fossil assemblages. Sixty‐five ilyocypridid specimens collected in mainland Italy and surrounding islands were analyzed. The patterns of valve surface ornamentation and of marginal ripplets were examined by electron microscopy. Moreover, the geometric morphometric analysis of the valve outlines was performed. Sixty‐two specimens could be easily accommodated in eight Ilyocypris species (I. bradyi, I. decipiens, I. getica, I. gibba, I. hartmanni, I. inermis, I. monstrifica, and I. salebrosa) according to the morphology of their appendages. Three additional specimens, with soft parts typical of Ilyocypris but clearly distinct valve morphology, were left in open nomenclature. Our results show that the outline analysis is often a valid tool to discriminate between different species. Conversely, valve ornamentation displays different degrees of intraspecific variability in some Ilyocypris species. The marginal ripplets are constant within each species population, but they do not always mirror the patterns reported by other authors; therefore, we do not consider them as reliable diagnostic character for specific determination. This study confirms that the identification of Ilyocypris species requires accurate description of appendages as well as external and internal carapace characteristics, and stresses the advantage of a combined neontological and paleontological investigation in solving taxonomic problems related to non‐marine ostracods.

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Phylogenetic relationships of coexisting Heterocypris (Crustacea, Ostracoda) lineages with different reproductive modes from Lampedusa Island (Italy)

Cited by 30 publications

References 55 publications

Hatching phenology and voltinism of Heterocypris barbara (Crustacea: Ostracoda) from Lampedusa (Sicily, Italy)

Hatching phenology and voltinism of Heterocypris barbara (Crustacea: Ostracoda) from Lampedusa (Sicily, Italy)

Inbreeding and outbreeding depression in geographical parthenogensHeterocypris incongruensandEucypris virens(Crustacea: Ostracoda)

TheIlyocyprispuzzle: A multidisciplinary approach to the study of phenotypic variability

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