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Unresolved cases of type fixation, synonymy and homonymy in harpacticoid copepod nomenclature (Crustacea: Copepoda)
TLDR
Type fixation for each of the 601 valid genera and 13 genera of doubtful identity (genera inquirenda) in the Harpacticoida (Crustacea, Copepoda) has been verified and new replacement names have been proposed for preoccupied generic names.
SPLANCHNOTROPHID SYSTEMATICS: A CASE OF POLYPHYLY AND TAXONOMIC MYOPIA
TLDR
Morphological analysis based on detailed re-examination of types and newly obtained material from existing museum collections revealed that the Splanchnotrophidae comprises genera drawn from three different families in addition to one non-copepodan taxon, and a new family Micrallectidae is proposed to accommodateMicrallecto Stock, 1971.
Crustaceans from bitumen clast in Carboniferous glacial diamictite extend fossil record of copepods.
Copepod crustaceans are extremely abundant but, because of their small size and fragility, they fossilize poorly. Their fossil record consists of one Cretaceous (c. 115 Ma) parasite and a few Miocene
Sexual dimorphism in calanoid copepods: morphology and function
TLDR
It is suggested that the loss of the antennulary geniculation in many non-centropagoidean calanoids has evolved in response to increasing predator pressure imposed on pairs in amplexus.
Diversity, ecology and evolution of groundwater copepods
TLDR
Copepod distributions at small spatial scales are most strongly affected by habitat type and heterogeneity, with sediment grain size and availability of organic matter being important habitat characteristics, and phylogenetic and distributional relicts and a high degree of endemism at different taxonomic levels are reflected.
The ontogeny and phylogeny of copepod antennules
TLDR
The ontogenetic analyses suggest that the timing of expression of intersegmental articulations during development may in future provide the most informative characters for phylogenetic study, rather than either segment numbers or the patterns of fused or undivided segments.
Small subunit rDNA and Bayesian inference reveal Pectenophilus ornatus (Copepoda incertae sedis ) as highly transformed Mytilicolidae, and support assignment of Chondracanthidae and Xarifiidae to
TLDR
Phylogenetic analysis of newly obtained data from the complete small subunit rDNA (18S) nuclear gene of a wide range of copepods placed the enigmatic Pectenophilus ornatus firmly in the Cyclopoida and revealed an unexpected but strongly supported relationship between the Chondracanthidae and Pseudanthessiidae.
Sexual dimorphism in calanoid copepods: morphology and function
TLDR
It is suggested that the loss of the antennulary geniculation in many non-centropagoidean calanoids has evolved in response to increasing predator pressure imposed on pairs in amplexus.
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