WebBivalves can be deposit-feeders (subclass Protobranchia), using their long, modified labial palps to collect ... of mantle and left valve diagrammatic transverse section gonad … There are lots… but here are a couple of links to recent texts. The Paleontological Society provides free access to its Digital Atlas of Ancient Lifethat contains oodles of explanatory texts, field guides, Apps, and images on the fossil record. Bringing Fossils to Life: An Introduction to Paleobiology, Donald Prothero. Now in … See more The most common bivalve configuration is two equal valves that are bilaterally symmetrical, which means when you view an articulated shell edge-on, the two valves are mirror images. There are lots of exceptions, the most … See more Beak: The pointy end of the shell (always dorsal) that represents the initial stage of animal growth. It points towards the anterior margin. … See more Adductor muscle scars: Variably shaped scars where the animal’s adductor muscles are attached to the shell. Two muscle scars are present in most equivalve species near the anterior and posterior margins of … See more
bivalves in thin section Archives - Geological Digressions
WebRudstone. 1. Rudstone/packstone. Grain-supported with carbonate mud matrix between grains; more than 10% of grains is > 2 mm. Skeletal grains include upper Cretaceous … WebShell: Brittle, thin shells with rough irregular surface and uneven concentric rings. Chalky-white to grey with brown/yellow skin on the edges. Rounded at foot, pointed at siphon end. Siphon doesn't have leather-like flap on the tip like the Horse Clam. Depth: 8-18 inches. Habitat: Sand, mud. Upper half-tide level near river mouths (low salinity). how to stock shelves faster
ALEX STREKEISEN-Brachiopods-
WebThin-shelled, burrowing bivalves with well developed syphons. Includes the families: Superfamilies, Families & Genus: ... the adductor muscle is divided into one section of … http://www.alexstrekeisen.it/english/sedi/brachiopods.php http://www.sepmstrata.org/Terminology.aspx?id=skeletal%20grains react themeforest