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Phylogeny of the Metazoa Based on Morphological and 18S Ribosomal DNA Evidence
TLDR
A new phylogenetic classification of the Metazoa including 35 formally recognized phyla and most traditional “phyla” are monophyletic, except for Porifera, Cnidaria (excluding Myxozoa), Platyhelminthes, Brachiopoda, and Rotifera.
Phylogeny of Annelida (Lophotrochozoa): total-evidence analysis of morphology and six genes
TLDR
The combined ("total-evidence") phylogenetic analysis provides a modified view of annelid evolution, with several higher-level taxa, i.e. the monophyly of the Aciculata, sister-group relationships between the Eunicida and OPC, between the Cirratuliformia and SSC, and possibly also between the "Clitellatomorpha" and Oweniidae-Pogonophora clades.
Gastrotricha and metazoan phylogeny
TLDR
It is concluded that cycloneuralian and gastrotrich ancestors were multiciliate and had epidermal cilia covered by cuticular sheaths.
Biogeography of the Mesoamerican Cichlidae (Teleostei: Heroini): colonization through the GAARlandia land bridge and early diversification
TLDR
A molecular phylogenetic and biogeographical analysis of the Mesoamerican cichlid fishes (Cichlidae: Cichlasomatinae: Heroini) reveals the spatial and temporal origins and diversification of the group.
The telomere repeat motif of basal Metazoa
TLDR
The results show that the ‘vertebrate’ telomere motif (TTAGGG)n is present in all basal metazoan groups, i.e. sponges, Cnidaria, Ctenophora, and Placozoa, and also in the unicellular metazoa sister group, the Choanozoa, and can be considered the ancestral telomeres repeat motif of Metazoa.
The basic body plan of arthropods: insights from evolutionary morphology and developmental biology
TLDR
Comparative morphology as well as embryology of malacostracans and hexapods suggest that the basic boundary subdividing the mandibulate body into the primary embryonic regions, anterior protocephalon and posterior protocorm, runs anteriorly to parasegment PS1 of mandibular segment.
The evolutionary origin of insect telomeric repeats, (TTAGG)n
TLDR
Analysis of polymerase dynamics in living Chinese hamster ovary cells using an established line that expresses the largest (catalytic) subunit of the polymerase (RPB1) tagged with the green fluorescent protein (GFP) shows this tagged polymerase to be fully functional.
Ultrastructure, development, and homology of insect embryonic cuticles
TLDR
Differences between the modes of cuticulogenesis in silverfish and pterygotes embryos suggest that the apterygote first larval instar was embryonized and became a fully embryonic prolarva in pteryGotes.
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