TY - JOUR

T1 - Amerikansk snegl Haminella solitaria (Say, 1822) har etableret sig i Roskilde Fjord.

AU - Jensen, Kathe

PY - 2022

Y1 - 2022

N2 - American cephalaspidean sea slug now established in RoskildeFjordThe non-indigenous cephalaspidean sea slug Haminella solitariawas discovered for the first time in Danish waters in August 2020.It was collected near the marina in Kulhuse at the northern endof Roskilde Fjord in shallow water, where it occurred throughSeptember along with its gelatinous egg masses, In the summerof 2021 it was found from late July through September, but not inMay or June. Further localities in 2021, Norsminde Fjord (N BeltSea), Gyldensteen Lagune (north coast Fyn), Lendrup Lagune(Limfjord) and Helnæs (SW coast of Fyn) have been obtainedfrom colleagues in Aarhus, Odense and Roskilde, and a photo-graphic record of egg masses from the Limfjord indicates that ithas been present since 2018. Haminella solitaria is a NorthwestAtlantic species, which was first observed in European waters inthe summer of 2016 at the Baltic coast of Germany. It is a smallgreyish sea slug, called “paper (or glass) bubble-shell”, with a thin,fragile, white, partly transparent shell, which is almost completelycovered by tissue folds from the head, foot and mantle. The shelllength in specimens from Kulhuse ranged from 4 to 11 mm. Itsegg mass is gelatinous, almost spherical and attached to the sub-strate by a short stalk.

AB - American cephalaspidean sea slug now established in RoskildeFjordThe non-indigenous cephalaspidean sea slug Haminella solitariawas discovered for the first time in Danish waters in August 2020.It was collected near the marina in Kulhuse at the northern endof Roskilde Fjord in shallow water, where it occurred throughSeptember along with its gelatinous egg masses, In the summerof 2021 it was found from late July through September, but not inMay or June. Further localities in 2021, Norsminde Fjord (N BeltSea), Gyldensteen Lagune (north coast Fyn), Lendrup Lagune(Limfjord) and Helnæs (SW coast of Fyn) have been obtainedfrom colleagues in Aarhus, Odense and Roskilde, and a photo-graphic record of egg masses from the Limfjord indicates that ithas been present since 2018. Haminella solitaria is a NorthwestAtlantic species, which was first observed in European waters inthe summer of 2016 at the Baltic coast of Germany. It is a smallgreyish sea slug, called “paper (or glass) bubble-shell”, with a thin,fragile, white, partly transparent shell, which is almost completelycovered by tissue folds from the head, foot and mantle. The shelllength in specimens from Kulhuse ranged from 4 to 11 mm. Itsegg mass is gelatinous, almost spherical and attached to the sub-strate by a short stalk.

M3 - Tidsskriftartikel

VL - 127

SP - 1

EP - 4

JO - Flora og Fauna

JF - Flora og Fauna

SN - 0015-3818

ER -