Academics Admission Student Life Athletics About Saint Michael's News & Events

Site codes explained and mapped  (under mapping resources tab)

Macroinvertebrates home

Streams project



These are the most common macroinvertebrates identified from samples from Señorial.

Click on images to zoom in. 

Class: Gastropoda
FAmily: Thiaridae

This family of Gastropoda is in the sub-class Prosobranchia, which is characterized by the presence of an operculum, which is a small lid that covers the entrance of the shell. The family Thiaridae is parthenogenetic, and has an operculum that looks like this.

CLASS: Bivalvia
FAmily: Corbiculidae

On this shell, the hinge ligament is visible from the outside as a leathery bulge.  On the inside, three cardinal teeth are visible, and on either side of those, there are two rows of lateral teeth, all pictured here.  Corbiculids, also called Asian Clams, are an invasive species not currently found in Vermont waters, although they have been found just two locks below Lake Champlain.  We have seen them in samples from Puerto Rico and The Bronx NY.  For more information on preventing exotic introductions, visit VT DEC's Aquatic Invasive Species site.

The images are not a substitute for keying, but should serve as an aid in identifying common macroinvertebrates in samples.

Feedback - Partner schools: send us specimens not included above.  Taxonomists: click to email: Declan McCabe
This site is supported by Vermont EPSCoR grant from the National Science Foundation (EPS #0701410).
©2008 Saint Michael's College
One Winooski Park, Colchester, Vermont, USA 05439 | 802.654.2000 |
Privacy Policy