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Topic: Aplacophora


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  Ivanov Home Page
Dissertation: Systematics and Phylogeny of the Subclass Caudofoveata (Mollusca, Aplacophora)
and diagnosis of taxa in the subclass Caudofoveata (Mollusca, Aplacophora).
Analysis of morphological characters of Caudofoveates (Mollusca: Aplacophora) by means of cladistics.
www.whoi.edu /science/B/aplacophora/Dima.html   (396 words)

  
 Tridachia Laboratory Exercise   (Site not responding. Last check: 2007-10-09)
The typical mollusc has a calcareous shell, muscular foot, head with mouth and sense organs, and a visceral mass containing most of the gut, the heart, gonads, and kidney.
The eumolluscan gut has digestive ceca which are lacking in aplacophorans, the gut is coiled, and a complex radular musculature is present.
The mantle cavity is posterior in the ancestor although it may be secondarily moved to an anterior position by torsion.
www.lander.edu /rsfox/310tridachiaLab.html   (2660 words)

  
 Mollusk -- Facts, Info, and Encyclopedia article   (Site not responding. Last check: 2007-10-09)
There are eight living (additional info and facts about classes) classes and one class, known only from fossils:
Class (additional info and facts about Caudofoveata) Caudofoveata (deep-sea wormlike creatures; 70 known species); now generally recognized as a subclass of Aplacophora.
Class Aplacophora (solenogasters, deep-sea wormlike creatures; 250 species)
www.absoluteastronomy.com /encyclopedia/m/mo/mollusk.htm   (677 words)

  
 Palaeos Invertebrates: Mollusca: Solenogastres   (Site not responding. Last check: 2007-10-09)
Despite being an important part of the deep-sea benthos, neomeniomorphs are poorly known, mainly because the difficulty of studying creatures that live in very deep water.
The Solenogastres have in the past been combined with the Caudofoveata to form the class Aplacophora.
Both these groups have been hypothesized to be ancient, pre-Tethyan deep-sea forms [ref the Aplacophora Home Page], perhaps relics of the original Cambrian procoelomate radiation.
www.palaeos.com /Invertebrates/Molluscs/Solenogastres   (569 words)

  
 Aplacophora
The foot is either virtually absent or vestigial: a simple ventral fold: It is much reduced and has become just a tiny median ventral ridge lying in a small longitudinal groove.
This means that the Aplacophora have no viable means of locomotion.
The head is poorly defined in all aplacophora, and their visceral mass consists of a very simple and straight digestive system.
www.manandmollusc.net /advanced_introduction/moll101aplacophora.html   (482 words)

  
 Solenogasters (Aplacophora) - MavicaNET   (Site not responding. Last check: 2007-10-09)
They can be divided into two groups (sometimes separated as Classes Caudofoveata and Solenogastres); caudofoveates are burrowers that feed on detritus and bottom-dwelling microorganisms, while soleonogasters, which also live on the bottom, feed on cnidarians.
A global collection of the deep-sea Aplacophora comprising some 20,000 specimens from about 60 surveys and expeditions will be monographed and a relational database developed along with keys, images, and short descriptions will be made available on the Internet.
The Aplacophora are one of the seven extant classes of the Phylum Mollusca. Aplacophorans are vermiform and spicule-bearing.
www.mavicanet.com /directory/nld/7133.html   (159 words)

  
 Aplacophora (Phylum Mollusca) : A Man and Mollusc Page.
Aplacophora (Phylum Mollusca) : A Man and Mollusc Page.
I am very small, only about 1 millimeter to 30 millimeters (about 1 inch) long, mollusc and I am considered by the scientists who study me to be a and very ancient mollusc in body structure.
Taxonomy of the Phylum Mollusca Voyages of the H.M. Bark Endeavour and its Replica
www.manandmollusc.net /beginners_intro/aplacophora.html   (238 words)

  
 Akiko Okusu
Primary research interest is to understand the evolution of Mollusca with an emphasis on the basal clades including Aplacophora and Polyplacophora.
Particular interests are in the phylogeny, systematics, larval ecology, evolution of metazoan body form, development, embryology, and life history traits.
Phylogenetic relationships of the Aplacophora and the Polyplacophora (Mollusca): a molecular analysis using the nuclear coding gene elongation factor - 1 alpha.
www.mcz.harvard.edu /Departments/InvertZoo/OkusuWebpage1.htm   (296 words)

  
 M30.htm   (Site not responding. Last check: 2007-10-09)
In return, they are also the major prey item of many fish and some marine mammal species.
The class Aplacophora (animals also known as Solenogasters) consists mostly of small worm-like molluscs that live symbiotically (or feed upon) cnidarians.
There are about 250 described species, usually found in deeper waters (over 200 meters depth), where they are sometimes quite abundant.
www.meer.org /M30.htm   (767 words)

  
 Palaeos Invertebrates: Millusca: Caudofoveata: Caudofoveata   (Site not responding. Last check: 2007-10-09)
The Caudofoveata are small, worm-like aberrant molluscs, ranging in length from 2 mm - 14 cm..
The Caudofoveata and Solenogasters are generally combined to form the class Aplacophora, although this practice is becoming discontinued as the differences between these two small primitive groups become known.
However, cladistic work by Haszprunar (Haszprunar 2000) indicates that Solenogasters are the most underived forms, with chaetoderms derived from them and higher (shell-bearing) molluscs next.
www.palaeos.com /Invertebrates/Molluscs/Caudofoveata   (334 words)

  
 Encyclopedia: Europe
Photomontage of plankton organisms Plankton is the aggregate community of weakly swimming but mostly drifting small organisms that inhabit the water column of the ocean, seas, and bodies of freshwater.
Classes Caudofoveata Aplacophora Polyplacophora - Chitons Monoplacophora Bivalvia - Bivalves Scaphopoda - Tusk shells Gastropoda - Snails and Slugs Cephalopoda - Squids, Octopuses, etc....
Classes Asteroidea Concentricycloidea Crinoidea Echinoidea Holothuroidea Ophiuroidea Echinoderms (Echinodermata) is a phylum of marine animals found in the ocean at all depths.
www.nationmaster.com /encyclopedia/Europe   (9592 words)

  
 Mollusk - Wikipedia, the free encyclopedia
There are eight living classes and one class, known only from fossils:
Class Caudofoveata (deep-sea wormlike creatures; 70 known species); now generally recognized as a subclass of Aplacophora.
Class Polyplacophora (chitons; 600 species, rocky marine shorelines)
en.wikipedia.org /wiki/Mollusk   (505 words)

  
 The Biological Bulletin: Discrimination and Phylogeny of Solenogaster Species Through the Morphology of Hard Parts ...
The Biological Bulletin: Discrimination and Phylogeny of Solenogaster Species Through the Morphology of Hard Parts (Mollusca, Aplacophora, Neomeniomorpha).@ HighBeam Research
Discrimination and Phylogeny of Solenogaster Species Through the Morphology of Hard Parts (Mollusca, Aplacophora, Neomeniomorpha).
Ten species in five genera and three families from continental shelf and deep-sea collections of neomenioid Aplacophora (Mollusca) are described, emphasizing external anatomy and hard parts--body shape, radula, epidermal spicules, and copulatory spicules--as well as the reproductive system.
www.highbeam.com /library/doc0.asp?DOCID=1G1:60808193&refid=ip_encyclopedia_hf   (203 words)

  
 Search Results for aplacophora - Encyclopædia Britannica
any small, wormlike, marine mollusk of the class Aplacophora.
The long-standing classification of Caudofoveata and Solenogastres within one class (Aplacophora) is not tenable.
The configuration of the mantle cavity in each group clearly contradicts the...
www.britannica.com /search?query=aplacophora&submit=Find&source=MWTAB   (130 words)

  
 Science Biology Flora Fauna Animalia Mollusca Aplacophora Directory IndiaPress
Science Biology Flora Fauna Animalia Mollusca Aplacophora Directory IndiaPress
Top: Science: Biology: Flora and Fauna: Animalia: Mollusca: Aplacophora
The Taxonomy of the Aplacophora - Deep+Sea Mollusks
www.indiapress.org /directory/Science-Biology-Flora_and_Fauna-Animalia-Mollusca-Aplacophora.html   (58 words)

  
 Molluscan Pictures Links Aplacophora (mollusks mollusk molluscs mollusc snails)   (Site not responding. Last check: 2007-10-09)
Molluscan Pictures Links Aplacophora (mollusks mollusk molluscs mollusc snails)
[Institutional] [General] [Aplacophora] [Bivalvia] [Cephalopoda] [Gastropoda] [Monoplacophora] [Polyplacophora] [Scaphopoda] [Slugs] [Shellfish]
All links verified working as of 15th May 2004.
www.molluscan.com /links/aplacophora.shtml   (37 words)

  
 Zoological Catalogue of Australia 17.2; Scheltema, A.M.; et al; Hardback; World Retail Store - English Books
Click on author name above for full title listing
This work covers four marine mollusc groups: Aplacophora, Polyplacophora (chitons), Scaphopoda, and Cephalopoda (octopuses, squids, cuttlefish and the chambered nautilus).
Each species is cited by name and references are given to all species known from A
www.worldretailstore.com /item/BE-0643067078.html   (236 words)

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