The New Beachcomber's Guide to the Pacific Northwest by Sept J. Duane;

Author:Sept, J. Duane;
Language: eng
Format: epub
Tags: Seashore animals, Pacific Coast, North America, Identification, Seashore plants, Pacific Northwest, Seashore biology, Field guides
ISBN: 9781550178579
Publisher: Harbour Publishing Co. Ltd.
Published: 2019-05-25T00:00:00+00:00

Boreal Astarte

Astarte borealis (Schumacher, 1817)

Other Name: Boreal tridonta.

Description: Shell exteriors are white, covered in a fibrous olive-brown to black periostracum. Shell interiors are white. The oval to orbicular shells feature several concentric ribs that are most pronounced mid-shell. The shells bear a hinge with thick teeth and the umbones are small, central and bent forward.

Size: Shells to 2.2″ (5.5 cm) long.

Habitat: In sand, mud or gravel; low intertidal zone to depths of 600′ (183 m).

Range: Circumboreal; Arctic to north-central British Columbia; the Bering Sea; Arctic to Massachusetts; Norway and Denmark.

Notes: Shells of the boreal astarte are a relatively common find in southeast Alaska on muddy shorelines. The valves of this species vary considerably in their appearance and proportions.

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.