Sex and Parthenogenesis — Evolutionary Ecology of Reproductive Modes in Non-Marine Ostracods

  title={Sex and Parthenogenesis — Evolutionary Ecology of Reproductive Modes in Non-Marine Ostracods},
  author={Paul D. N. Hebert},
  • P. Hebert
  • Published 1 June 1999
  • Biology
  • Heredity
Sex and Parthenogenesis — Evolutionary Ecology of Reproductive Modes in Non-Marine Ostracods 
Exceptional cryptic diversity and multiple origins of parthenogenesis in a freshwater ostracod.
It is argued that this may be an artefact of the existence of unsampled or extinct sexual lineages, and a revision of the single species status of E. virens is suggested. Expand
Brood care in a Silurian ostracod
An exceptionally preserved new ostracod crustacean from the Silurian of Herefordshire, England, preserves eggs and possible juveniles within its carapace, providing an unequivocal and unique view ofExpand
Heterocypris (Crustacea, Ostracoda) from the Isole Pelagie (Sicily, Italy): Population genetics
Genetic differentiation of the two female morphotypes is compatible with the hypothesis that the two morphotypes represent different species of Heterocypris although, such a morphological differentiation is not unusual in populations of the same parthenogenetic species, and evidence of hybridisation between males and parthenogenic females is found. Expand
Do Reproductive Modes and Swimming Ability Influence Occurrence of Non-Marine Ostracod (Crustacea) Species among Aquatic Habitats?
It is suggested that swimming mode has a greater effect on species distribution among the habitats than reproductive modes in parthenogenetic species with swimming setae and with relatively higher tolerance ranges. Expand
Effect of environmental stress on clonal structure of Eucypris virens (Crustacea, Ostracoda)
The results suggest that in some conditions in wild-collected samples of two parthenogenetic populations of the freshwater ostracod Eucypris virens, an intermediate level of environmental stress may lessen the decline in genetic diversity by strong inter-clonal competition. Expand
Parthenogenesis and Sexuality in Oribatid Mites : phylogeny, mitochondrial genome structure and resource dependence
Character history and ancestral state evolution analyses revealed that Crotoniidae re-evolved sexuality from the parthenogenetic cluster of Camisiidae, which violates Dollo’s law that complex ancestral states can never be reacquired. Expand
Structural specialities, curiosities and record-breaking features of crustacean reproduction
These reproductive peculiarities are reviewed and their implication for basic and applied biology is discussed, including the early evolution and diversification of brood care in arthropods, sperm competition and assurance of paternity, posthumous paternity and sustainable male-based fishery, and ecotype changes by man-made pollution. Expand
Salinity tolerance of Darwinula stevensoni (Crustacea, Ostracoda)
The results seem to support the hypothesis of high phenotypic plasticity for salinity tolerance in D. stevensoni, and surprisingly low mortality was observed in all treatments and for all life stages, independently of population of provenance. Expand
Characteristics of parthenogenesis in Cacopsylla ledi (Flor, 1861) (Hemiptera, Sternorryncha, Psylloidea): cytological and molecular approaches
It is suggested that functional diploids produced in a parthenogenetic population can give rise either to a new parthenogenic lineage or even to anew bisexual species. Expand
Heterocypris (Crustacea, Ostracoda) from the Isole Pelagie (Sicily, Italy): The coexistence of different morphotypes
Differences in mean body size between the adult females with and without the lamella hyalina are in accordance with values reported in the literature for niche differentiation among sympatric taxa. Expand