Several names share this combination and are defined under the rules of the botanical code. The species name Polysiphonia urceolata might be an homonymy case.
The name Polysiphonia urceolata is a slight homonymy case. This name is used according to the rules of several different nomenclatural codes.

Polysiphonia urceolata auct. japon.

Botany

Polysiphonia urceolata Grev.

Botany

Taxonomy

Algues 3
Polysiphonia 3

Specimens registered in collections

Collection Number of specimens (or sets)
Cryptogams (PC) 3

Polysiphonia urceolata (Dillwyn) Greville

Botany

Taxonomy

Algues 1
Polysiphonia 1

Specimens registered in collections

Collection Number of specimens (or sets)
Cryptogams (PC) 1

Polysiphonia urceolata (Lightf.) Grev.

Botany

Taxonomy

Algues 3
Polysiphonia 3

Specimens registered in collections

Collection Number of specimens (or sets)
Cryptogams (PC) 3

Polysiphonia urceolata (Lightfoot ex Dillwyn) Greville

Zoology

Taxonomy

Polysiphonia 41

Specimens registered in collections

Collection Number of specimens (or sets)
Marine Laboratory of Concarneau (CO) 41

Polysiphonia urceolata Lyngbye

Zoology

Taxonomy

Polysiphonia 10

Specimens registered in collections

Collection Number of specimens (or sets)
Marine Laboratory of Concarneau (CO) 10