WebDec 1, 2005 · A theoretical morphologic model defining patterns of shell sculptures in Bivalvia is introduced. It is based on the displacement of sculptural elements along the … WebApr 15, 2015 · This chapter discusses the following bivalve species that have been chosen: for Mussels the genus Mytilus, for oysters Ostrea and Crassostrea, for scallops Pecten maximus and for clams Mercenaria mercenaria.The general morphology and functions of the shell, mantle, foot, gill, alimentary canal, gonad, heart, kidney and nervous tissue are …
Theoretical morphology of bivalve shell sculptures - BioOne …
WebMar 11, 2024 · Morphology was examined in 21 of those 33 species based on preserved specimens from museum collections. For the remaining 12 sequenced species, morphological data was obtained using surrogate species within the same genus. In total we examined 43 species (25 genera) from the following collections: Museum of Comparative … WebMay 22, 2024 · Mussel shells are often found in archaeological excavations and can provide information useful for ecological reconstruction and assessment of anthropogenic impact on waters. In this study, two sample groups of swollen river mussel (Unio tumidus) which occurred during the Early Middle Ages (EMS) and currently (MS) in the Oder river … flower and garden magazine subscription
Class Bivalvia: The Wonders of Bivalves, Their Shells & Anatomy
WebAbstract. Several bivalve species burrow into sandy sediments to reach their living position. There are many hypotheses concerning the functional morphology of the bivalve shell … WebThe bivalve shell is made of calcium carbonate embedded in an organic matrix secreted by the mantle. It has a simple nervous system; the head is absent. The digestive system comprises a complex stomach and a simple intestine. Bivalves possess pericardial glands of the heart or the pericardium; they serve as an additional filtration device. WebApr 8, 2016 · A theoretical morphologic model defining patterns of shell sculptures in Bivalvia is introduced. It is based on the displacement of sculptural elements along … greek learning courses