Polycelis is a genus of in the family Planariidae found in the Holarctic region (North America and Eurasia).
Description
Species of
Polycelis are characterized by having multiple eyes on the anterior region, similar to the related genera
Seidlia and
Ijimia. It is differentiated from them by lacking both a highly developed muscle coat around the male atrium (as seen in
Seidlia) and adenodactyls (as seen in
Ijimia).
Habitat
Most species of
Polycelis inhabit clean, high-altitudinal streams with water temperatures between 0 and 14 °C in Eurasia and North America.
Species
The following species are recognised in the genus
Polycelis:
[Tyler S, Schilling S, Hooge M, and Bush LF (comp.) (2006-2025) Turbellarian taxonomic database. Version 2.2 ]
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Polycelis aurantiacus
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Polycelis benazzii
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Polycelis bilinearis
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Polycelis brunnea
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Polycelis catulus
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Polycelis cormita
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Polycelis coronata
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Polycelis eburnea
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Polycelis elegans
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Polycelis eudendrocoeloides
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Polycelis eurantron
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Polycelis fallax
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Polycelis felina
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Polycelis gracilis
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Polycelis jinglensis
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Polycelis jingyuanica
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Polycelis kashmirica
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Polycelis koslowi
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Polycelis kulsaika
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Polycelis lhunzhubica
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Polycelis linkoi
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Polycelis nigra
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Polycelis nigro-fusca
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Polycelis nyingchica
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Polycelis oculimarginata
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Polycelis pallida
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Polycelis pamirensis
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Polycelis panniculatus
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Polycelis pantherina
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Polycelis pathan
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Polycelis polyopis
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Polycelis pulla
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Polycelis receptaculosa
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Polycelis relicta
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Polycelis sapporo
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Polycelis schmidti
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Polycelis sierrensis
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Polycelis sinensis
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Polycelis stummeri
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Polycelis surantion
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Polycelis tenuis
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Polycelis tibetica
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Polycelis tothi
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Polycelis vaginuloides
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Polycelis variabilis
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Polycelis wutaishanica
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Polycelis yangchengensis
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Polycelis xigazensis
