subclass
Opisthobranchs
Heterobranchia
Field notes
Heterobranchia, the heterobranchs (meaning "different gill"), is a taxonomic clade of snails and slugs, which includes marine, aquatic, and terrestrial gastropod molluscs.
Heterobranchia is one of the main clades of gastropods. Currently Heterobranchia comprises two groups: the opisthobranchs, and the pulmonates.
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Range
Greener is more native, amber more introduced; paler is less certain. How this was decided
Most observed native opisthobranchs All
Native to the US, by observations.
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White-lipped Snail
Cepaea hortensis
23,247 observations
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Monterey Dorid
Doris montereyensis
17,809 observations
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Button's Banana Slug
Ariolimax buttoni
17,044 observations
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Pacific Sideband
Monadenia fidelis
13,902 observations
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Meadow Slug
Deroceras laeve
13,467 observations
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Acute Bladder Snail
Physella acuta
12,641 observations
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Spotted Dorid
Triopha maculata
12,059 observations
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Changeable Mantleslug
Megapallifera mutabilis
11,412 observations
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Hopkins' Rose Nudibranch
Ceratodoris rosacea
11,031 observations
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White-lip Globe Snail
Mesodon thyroidus
10,527 observations
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California Seahare
Aplysia californica
10,106 observations
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Red Sponge Dorid
Rostanga pulchra
8,510 observations
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Marsh Ramshorn
Planorbella trivolvis
8,381 observations
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Slender Banana Slug
Ariolimax dolichophallus
7,543 observations
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Oval Ambersnail
Novisuccinea ovalis
7,436 observations