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Larval neurogenesis in Sabellaria alveolata reveals plasticity in polychaete neural patterning
TLDR
The development of the larval nervous system in the polychaete Sabellaria alveolata is document using fluorescence‐coupled antibodies directed against serotonin, FMRFamide, and tubulin in combination with confocal laser scanning microscopy and 3D reconstruction software to highlight the complex mechanisms that underlie annelid body segmentation. Expand
Diversity and disparity ‘down under’: Systematics, biogeography and reproductive modes of the ‘marsupial’ freshwater Thiaridae (Caenogastropoda, Cerithioidea) in Australia
TLDR
Based on a new taxonomic framework for the Thiaridae, some of the pertinent problems with naming and artificial delineation of species are pointed out, revealing why typology and earlier practice of splitting was misleading in case of these truly “Darwinian snails”. Expand
Sipunculans and segmentation
Comparative molecular, developmental, and morphogenetic analyses show that the three major segmented animal groups – Lophotrochozoa, Ecdysozoa, and Vertebrata - use a wide range of ontogeneticExpand
Integrative analysis of polychaete ontogeny: cell proliferation patterns and myogenesis in trochophore larvae of Sabellaria alveolata
TLDR
It is found that in the first three segments the ventral transverse muscles differentiate from anterior to posterior, whereas the ventrals oblique muscles develop simultaneously, thus emphasizing the plasticity of the formation of metamerically arranged organ systems in polychaetes. Expand
Neurogenesis suggests independent evolution of opercula in serpulid polychaetes
TLDR
It is demonstrated that common morphological traits such as the prostomial appendages may have evolved independently in respective serpulid sublineages and therefore require reassessment before being used in phylogenetic analyses. Expand
Convergence Caused Confusion: On the Systematics Of the Freshwater Gastropod Sulcospira pisum (Brot, 1868) (Cerithioidea, Pachychilidae)
TLDR
Evidence is presented that “Melania” pisum is not a thiarid species closely related to Balanocochlis glans (Busch, 1842), as has been supposed with respect to the very similar shells of both species. Expand
Capitellid connections: contributions from neuromuscular development of the maldanid polychaete Axiothella rubrocincta (Annelida)
TLDR
Comparative neurodevelopmental analysis of capitellid and echiuran species reveals several common characters, including simple circumesophageal connectives, a single fused ventral nerve strand, and a stomatogastric ring nerve, that support a close relationship of both taxa, thus corroborating recent molecular phylogenetic analyses. Expand