D. Littlewood

Publications99
h-index43
Citations6,232
Highly Influential Citations486
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Acoel flatworms: earliest extant bilaterian Metazoans, not members of Platyhelminthes.
TLDR
Sequence data of 18S ribosomal DNA genes from non-fast evolving species of acoels and other metazoans reveal that this group does not belong to the Platyhelminthes but represents the extant members of the earliest divergent Bilateria, an interpretation that is supported by recent studies on the embryonic cleavage pattern and nervous system of acOels.
Molecular phylogenetic analysis of the Microphalloidea Ward, 1901 (Trematoda: Digenea)
TLDR
It is demonstrated that the Microphalloidea, as represented by the present data-set, consists of three main clades corresponding to the families Lecithodendriidae, Microphallidae and Pleurogenidae + Prosthogonimidae.
The interrelationships of all major groups of Platyhelminthes: phylogenetic evidence from morphology and molecules
TLDR
It is stressed that morphological and molecular data in some respects lead to contradictory results, for instance concerning the position of the Fecampiidae/Urastoma/Ichthyophaga and the relative position ofThe Lecithoepitheliata.
Utility of complete large and small subunit rRNA genes in resolving the phylogeny of the Neodermata (Platyhelminthes): implications and a review of the cercomer theory
TLDR
The Monogenea and Proseriata were resolved as monophyletic, rejecting previous suggestions of paraphyly based on SSU and partial LSU data sets and thus supporting widely accepted morphological synapomorphies and highlighting problems associated with the ‘cercomer theory’.
The interrelationships of proseriata (Platyhelminthes: seriata) tested with molecules and morphology.
TLDR
A new morphological matrix consisting of 16 putatively homologous characters and two molecular data sets to investigate further this major group of free-living members of the Platyhelminthes, where the monophyly of the Proseriata cannot be confirmed categorically with any of these data sets.
Phylogenies inferred from mitochondrial gene orders-a cautionary tale from the parasitic flatworms.
TLDR
Investigations on the mitochondrial genomes of two groups of human blood flukes within the genus Schistosoma revealed striking divergences in mitochondrial gene order, startled by the remarkable differences which came to light between the two groups.
Phylogeny of the Platyhelminthes and the evolution of parasitism
TLDR
The combined evidence solution for the phylogeny of fiatworms based on 18S rDNA and morphology is used to interpret morphological and life-history data and to support a model for the evolution and radiation of neodermatan parasites in the group.
Xenoturbella is a deuterostome that eats molluscs
TLDR
It is shown that the samples in these studies were contaminated by bivalve embryos eaten by Xenoturbella and that XenOTurbella is in fact a deuterostome related to hemichordates and echinoderms.
The phylogeny of the Schistosomatidae based on three genes with emphasis on the interrelationships of Schistosoma Weinland, 1858
TLDR
The principal findings are that Ornithobilharzia and AustrobilHarzia form a sister group to the Schistosoma; mammalian schistosomes appear paraphyletic and 2 TrichobilharZia species, T. ocellata and T. szidati, seem to be synonymous.
Widespread vertical transmission and associated host sex–ratio distortion within the eukaryotic phylum Microspora
TLDR
Evidence is presented for widespread use of vertically transmitted microsporidia and associated sex–ratio distortion in a eukaryotic phylum and it is proposed that VT is either an ancestral trait or evolves with peculiar frequency in this phylum.
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