Species:

Isthmoplea sphaerophora(Carmichael) Gobi

Tvesli in Norwegian Bokmål

Classification

The species Isthmoplea sphaerophora belongs to:

Photos

Photos of Isthmoplea sphaerophora (4):

  • Photo of Isthmoplea sphaerophora
  • Photo of Isthmoplea sphaerophora
  • Photo of Isthmoplea sphaerophora
  • Photo of Isthmoplea sphaerophora

1 of 4: Habit

Photo of Isthmoplea sphaerophora
Specimens growing epiphytically on Cladophora rupestris Photo: © Kjersti SjøtunTerms of use

Note: The species is up to a few cm long and grows in the upper subtidal and lower part of the intertidal. It is often an epiphyte on Cladophora rupestris. In southern Norway it is found during spring, while it may also be found during summer in northern Norway. The thallus is pluriseriate in older parts, otherwise the axes are uniseriate. It has conspicuous main axes with side branches normally opposite or in whorls. Unilocular sporangia often occur together with the whorl branches, or opposite a side branch.

2 of 4: Branching pattern

Photo of Isthmoplea sphaerophora
Main axis with side branches, the dark spots are unilocular sporangia Photo: © Kjersti SjøtunTerms of use

3 of 4: Close-up of branches with unilocular sporangia

Photo of Isthmoplea sphaerophora
Unilocular sporangia and initials of unilocular sporangia occur opposite each other or in whorls, or opposite side branches Photo: © Kjersti SjøtunTerms of use

4 of 4: Pluriseriate part of axis

Photo of Isthmoplea sphaerophora
Axis showing both transverse and longitudinal cell divisions Photo: © Kjersti SjøtunTerms of use