The
following information was gathered primarily from observations made in the
field during this research. However it has been supplemented with some
information from both "The Freshwater Snails of Connecticut" and
"The Freshwater Snails of New York State" both by Eileen Jokinen. The list here is not exhaustive of all species that have been documented on White Memorial Property as only those species that were documented during the research performed in 2016 could be accurately discussed. All images credited to White Memorial Conservation Center taken with AmScope microscope camera.
Campeloma decisum
·
Substrate:
o
Sandy to
silty soils
·
Vegetation:
o
Preferred decaying vegetation or logs to any
living forms of aquatic vegetation
·
Abundance:
o
Abundant
·
Features
o
Body Size:
§
Medium to large
o
Operculum:
§
Yes
o
Shape:
§
Has pointed shell with rounded body whorl.
o
Color:
§
Light olive to darker browns and greens.
Normally has vertical lines running along the shell.
o
Sinstral vs. Dextral:
§
Dextral
Helisoma anceps
·
Substrate:
o
Sandy to muddy soils
·
Vegetation:
o
Partially submerged aquatic vegetation or
decaying aquatic vegetation
·
Abundance:
o
Abundant
·
Features
o
Body Size:
§
Medium to Large
o
Operculum:
§
No
o
Shape:
§
Rams horn, flat like a coin with body spirals.
Has ridges running along both sides of shell
o
Color:
§
Reddish to dark brown.
o
Sinstral or Dextral:
§
Unavailable
Helisoma companulatum
·
Substrate:
o
Varying substrate but preferring decaying
materials, however was also found in rocky and sandy substrate
·
Vegetation:
o
Decaying vegetation but also living partially
submerged aquatic vegetation
·
Abundance:
o
Infrequent (While found in multiple sites
overall numbers at each site were small)
·
Features
o
Body Size
§
Large
o
Operculum
§
No
o
Shape:
§
Rams horn, flat like a coin with body spirals.
The aperture flares into a bell shape
o
Color:
§
Reddish to dark brown
o
Sinstral or dextral:
§
Unavailable
Helisoma trivolvis
·
Substrate
o
Muddy and clay
·
Vegetation
o
Lots of partially submerged aquatic vegetation
·
Abundance
o
Infrequent
·
Features
o
Body size
§
Large (largest of rams horns found)
o
Operculum
§
No
o
Shape
§
Rams horn, flat like a coin with body spirals.
Aperture comes to more of a point than other rams horns
o
Color
§
Yellowish to brown
o
Sinstral or dextral
§
Unavailable
Amnicola limosa
o
Sandy with decaying terrestrial vegetation
·
Vegetation
o
Submerged aquatic vegetation
·
Abundance
o
Frequent in beginning of summer however due to
breeding patterns will not be found in later summer months
·
Features
o
Body Size
§
Tiny (no more than 5mm)
o
Operculum
§
Yes
o
Shape
§
Spiral raised shell, with globular shape
o
Color:
§
Tan to yellow brown
o
Sintral or dextral
§
Dextral
Vivparus geogianus
·
Substrate:
o
Sandy or muddy bottoms
·
Vegetation
o
Submerged aquatic vegetation, however small
amounts
·
Abundance
o
Infrequent (may be due to migration patterns)
·
Features
o
Body Size
§
Large
o
Operculum
§
Yes
o
Shape
§
Shell raised in spiral
o
Color
§
Chestnut colored bands along the shell
o
Sintral or dextral
§
Dextral
Physa gyrina
·
Substrate:
o
Rocky substrate usually found clinging to sides
of rocks
o
Vegetation
o
Don’t appear to need large amounts of vegetation
either submerged or decaying
o
Abundance
o
Abundant
o
Features
o
Body Size
§
Small
o
Operculum
§
No
o
Shape
§
Aperture longer than spire
o
Color
§
Dark brown to pale brown with yellow markings
o
Sinstral or dextral
§
Sinstral
Physa integra
·
Substrate
o
Boulders, clay and mud
·
Vegetation
o
Some floating/ partially submerged vegetation
·
Abundance
o
Infrequent
·
Features
o
Body Size
§
Medium (18mm)
o
Operculum
§
No
o
Shape
§
Large aperture and pointed spire
o
Color
§
Tan to brown
Physa ancillary
·
Substrate
o
Rocky substrate with decaying materials
·
Vegetation
o
Partially submerged vegetation as well as
decaying vegetation
·
Abundance
o
Infrequent
·
Features
o
Body size
§
Medium
o
Operculum
§
No
o
Shape
§
Large flared aperture with rounded short spire
o
Color
§
Tan to reddish
*Due to similarities of shells in Physa, identification is only truly possible through anatomy of penial complex. For this reason only an example is being shown for Physa integer and Physa ancillary however it is possible to show a picture of Physa gyrina due to the distinctive red band.*
Aplexa elongata
·
Substrate
o
Muddy and sandy substrate
·
Vegetation
o
Floating vegetative mat
·
Abundance
o
Infrequent
·
Features
o
Body size
§
Medium
o
Operculum
§
No
o
Shape
§
Tall and thin, with pointed spire
o
Color
§
Light brown in color
Ferrissia californica
·
Substrate:
o
Boulders and other rocks
·
Vegetation
o
Small amounts of aquatic vegetation
·
Abundance
o
Frequent
·
Features
o
Body Size
§
Small (4 mm)
o
Operculum
§
No
o
Body Shape
§
Flat with no body whorls and a slightly raised
bump slightly off center
o
Color
§
Dark brown to tan
o
Sinstral or dextral
§
Unavailable
Promentus exacucuous
o
Muddy and silty soils
·
Vegetation
o
Floating vegetative mat with lots of other
aquatic vegetation
·
Abundance
o
Infrequent
·
Features
o
Body Size
§
Medium
o
Operculum
§
No
o
Body Shape
§
Flat with whorls. Height is extremely tiny.
Opening comes to a point when looking at it flat or horizontally
o
Color
§
Brown to reddish
o
Sinstral or Dextral
§
Unavailable
Pseudosuccinea columella
·
Substrate
o
Mostly found on decaying logs and other detritus
·
Vegetation
o
Lots of aquatic vegetation mainly found in areas
with heavy amounts of vegetation cover
·
Abundance
o
Frequent
·
Features
o
Body Size
§
Medium
o
Operculum
§
No
o
Body Shape
§
Large aperture. Distinctive tear drop shape in
the aperture
o
Color
§
Light green to tan
o
Sinstral or Dextral
§
Dextral
No comments:
Post a Comment