Attheya longicornis Crawford & Gardner

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Attheya longicornis

A-C = Cells on Skeletonema costatum (A,B,D = BF, C = PC) (arrow in C = base of horn parallel to pervalvar axis); D = Four cells (arrow = tightly coiled horns). A and B in Lugol, C and D living cells.

Photographer/artist Mats Kuylenstierna

Additional image information

Title
Attheya longicornis
Photographer/artist
Mats Kuylenstierna
Copyright holder
Maria Kuylenstierna
Institute
University of Gothenburg, Marine botany
Contributor
Bengt Karlson
Caption
A-C = Cells on Skeletonema costatum (A,B,D = BF, C = PC) (arrow in C = base of horn parallel to pervalvar axis); D = Four cells (arrow = tightly coiled horns). A and B in Lugol, C and D living cells.
Image galleries
Kuylenstierna, Skagerrak-Kattegat

Description

IDs in other systems
Morphology
Thin long horns initially parallel to the pervalvar axis and projecting up to 10 times the cell length
Other remarks
This species has been confused with Attheya septentrionalis (Østrup) Crawford in the past
Distribution: Northern Atlantic
Life form
Epiphytic on Chaetoceros, Skeletonema and others
Size
Apical axis = 4-12 µm, transapical axis = 2-3 µm
Resting spore
0
Culture collections
SCCAP
The Scandinavian Culture Collection of Algae and Protozoa at the University of Copenhagen
More info at http://www.sccap.dk.
Strains: K-1530, K-1528
Literature
Crawford, R. M., Gardner, C. & Medlin, L. K. 1994. The genus Attheya. 1. A description of four new taxa, and a transfer of Gonioceros septentrionalis and G. armatas. Diatom Research. 9: 27-51.

Biovolumes

Species Attheya longicornis
Author Crawford & Gardner 1994
Division CHRYSOPHYTA (HETEROKONTOPHYTA)
Class Diatomophyceae (Bacillariophyceae)
Order EUPODISCALES (BIDDULPHIALES, CENTRALES)
Trophy AU
Geometric shape oval cylinder
Formula p/4*d1*d2*h
Size class 1
Unit cell
Size range 4-5x7-8
Height(h), µm 8.0
Diameter(d1), µm 4.0
Diameter(d2), µm 4.0
No. of cells/counting unit 1
Calculated volume, µm3 100
Comment *
Calculated Carbon pg/counting unit 12

Source

Olenina, I., Hajdu, S., Edler, L., Andersson, A., Wasmund, N., Busch, S., Göbel, J., Gromisz, S., Huseby, S., Huttunen, M., Jaanus, A., Kokkonen, P., Ledaine, I. and Niemkiewicz, E. 2006 Biovolumes and size-classes of phytoplankton in the Baltic Sea HELCOM Balt.Sea Environ. Proc. No. 106, 144pp. (PDF),
PEG_BVOL.zip

Change History

  • 2011-10-07 13:26:34 Bengt Karlson - Updated media metadata for Attheya longicornis_2.jpg
  • 2011-10-07 13:25:59 Bengt Karlson - Added media: Attheya longicornis_2.jpg