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Still Waters is the twenty-first and penultimate studio album by the Bee Gees, released on 10 March 1997 in the UK by Polydor Records, and on 6 May the same year in the US by A&M Records. The group made the album with a variety of top producers, including Russ Titelman , David Foster , Hugh Padgham , and Arif Mardin .
Aculifera (older name: Amphineura) is a proposed clade of molluscs incorporating those groups that have no conch or shell, that is, the Polyplacophora, Caudofoveata (=Chaetodermomorpha) and Solenogastres (=Neomeniomorpha). [1]
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
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 ...
This is unlike the Polyplacophora (chitons), which have a number of pairs of ctenidia, but this number varies and is not related to the number of their body 'segments'. [5] The foot and pallial groove are very difficult indeed to discriminate from the polyplacophora, [5] supporting its placement in this group by molecular methods [3]
Sirenko B.I. 1993. Revision of the system of the order Chitonida (Molluscs: Polyplacophora) on the basis of correlation between the type of gills arrangement and the shape of the chorion processes. Ruthenica 3: 93-117
Polyplacophora: Order: Lepidopleurida: Family: Hanleyidae: Genus: Hanleya Gray, 1857: Hanleya is a genus of polyplacophoran molluscs known from Oligocene and Miocene ...
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