Search results
Results From The WOW.Com Content Network
Chiton phylogeny has gone relatively underexplored compared to the more charismatic classes of molluscs, and as such is still somewhat poorly understood. The relationships between orders and superfamilies has been made clear thanks to phylogenomics, [ 42 ] [ 43 ] but interfamilial relationships are still largely unknown because of the lack of ...
In contrast to many other mollusc classes, aplacophorans have no shell, and are instead covered by aragonitic sclerites (calcareous spicules), which can be solid or hollow.. These spicules can be arranged perpendicular to one another within the cuticle to form a skeleton, stick up to form a palisade, or can lie flat against the cutic
Effects of climate change, present and future, are not fully understood but it will probably affect the diversity and structure of the intertidal communities K. tunicata reside in. [3] This species is protected in the USA under the Coastal Zone Management Act.
The distribution of Chiton magnificus ranges along the Pacific coast of South America from Cape Horn in Chile [3] to San Lorenzo Island in Peru. [2] Although there are old claimed records of this species from the Galápagos Islands, these are now considered incorrect.
In 2006 a molecular study on Laevipilina antarctica suggested that extant Monoplacophora and Polyplacophora form a well-supported clade with the researched Neopilina closest to the chitons. [6] The two classes in this new clade, with the proposed name Serialia, all show a variable number of serially repeated gills and eight sets of dorsoventral ...
A still unclassified multilegged predatory polychaete worm was identified only by observation from the underwater vehicle Nereus at the bottom of the Challenger Deep, the greatest depth in the oceans, near 10,902 m (35,768 ft) in depth. It was about an inch long visually, but the probe failed to capture it, so it could not be studied in detail.
Synopses of the British Fauna is a series of identification guides, published by The Linnean Society and The Estuarine and Coastal Sciences Association.Each volume in the series provides and in-depth analysis of a group of animals and is designed to bridge the gap between the standard field guide and more specialised monograph or treatise.
Some species of limpet live in fresh water, [19] [20] but these are the exception. Most marine limpets have gills, whereas all freshwater limpets and a few marine limpets have a mantle cavity adapted to breathe air and function as a lung (and in some cases again adapted to absorb oxygen from water). All these kinds of snail are only very ...