AlgaTerra Summary Hippodonta capitata

Hippodonta capitata (Ehrenb.) Lange-Bert., Metzeltin & Witkowski
in Iconogr. Diatomol. 4: p. 254. 1996.
has basionym:
Navicula capitata Ehrenb.
Infusionsthierchen, p. 185, pl. 13: fig. 20. 1838.

 

TYPE:
Navicula capitata Ehrenb.
Infusionsthierchen, p. 185, pl. 13: fig. 20. 1838.

Lectotype: Taxonomic preparations No. 540129-2 [Preparation Polygastrica CXXIX 2] designated by: R.Jahn & Kusber in Willdenowia 34: 584. 2004.
Locality: Berlin
TDWG-Gazetteer: Germany (GER-OO)
Region: Europe
Continent: Europe
Collection: Ehrenberg Collection
City: Berlin (Germany)
Herbarium Code: BHUPM
Reference: Jahn, R. & Kusber, W.-H. (2004) - Algae of the Ehrenberg collection - 1. Typification of 32 names of diatom taxa described by C. G. Ehrenberg - Willdenowia 34: 577-595.

Photograph: Lectotype of Navicula capitata Ehrenb. (current name: Hippodonta capitata (Ehrenb.) Lange-Bert. et al.): Taxonomic preparations No. 540129-2 [Preparation Polygastrica CXXIX 2] in BHUPM,  designated and published by: R.Jahn & Kusber in Willdenowia 34: 584. 2004. Scale bar =10 µm.

 

Taxonomy sec. AlgaTerra Information System


The following information is work in progress and does not include all possible synonyms.
Hippodonta capitata (Ehrenb.) Lange-Bert., Metzeltin & Witkowski
in Iconogr. Diatomol. 4: p. 254. 1996.
 
Taxonomic status: Accepted
Rank: Species
Basionym: Navicula capitata Ehrenb.
Classification: ALGAE
BACILLARIOPHYCEAE
Hippodonta Lange-Bert., Metzeltin & Witkowski
Included taxa: Hippodonta capitata subsp. iberoamericana Metzeltin, Lange-Bert. & García-Rodríguez
Concept relations: is congruent to Hippodonta capitata (Ehrenb.) Lange-Bert., Metzeltin & Witkowski sec. Kusber, W.-H. & Jahn, R. - Annotated list of diatom names by Horst Lange-Bertalot and co-workers 2003.

is congruent to Hippodonta capitata (Ehrenb.) Lange-Bert., Metzeltin & Witkowski sec. K. Hamann - AWI Institute 2004.

is congruent to Hippodonta capitata (Ehrenb.) Lange-Bert., Metzeltin & Witkowski sec. Lange-Bertalot, H. - Current concept 2001-2005.

is congruent to Navicula capitata Ehrenb. sec. Lange-Bertalot, H. - Rote Liste der limnischen Kieselalgen (Bacillariophyceae) Deutschlands 1996: 633-677.

DESCRIPTION

Hippodonta capitata (Ehrenb.) Lange-Bert., Metzeltin & Witkowski
in Iconogr. Diatomol. 4: p. 254. 1996.
sec. Lange-Bertalot, H. - Current concept 2001-2005.

Hippodonta capitata is characterized by its valve shape, broad in the middle, ends protracted, distinctly rostrate to capitae (see type specimen in AlgaTerra). Further taxa are gradually or not narrowing towards the ends.

AlgaTerra, 13 Febuary 2005.

Fact Reference: Lange-Bertalot, H. (2001) - Navicula sensu stricto, 10 genera separated from Navicula sensu lato, Frustulia - Diatoms of Europe 2: 1-526.

ILLUSTRATIONS

Picture above: Hippodonta capitata: Light-microscopic valvar view of H. capitata, strain no. 124 in BRM,  © K. Hamann, AWI Institute, Bremerhaven. Unpublished data, researched within the AlgaTerra project 2004.

Picture above: Hippodonta capitata: Light-microscopic valvar view of the living cell (see chloroplast colour and shape), strain no. 124 in BRM,  © K. Hamann, AWI Institute, Bremerhaven. Unpublished data, researched within the AlgaTerra project 2004.

Picture above: Hippodonta capitata: SEM valvar internal view © K. Hamann, AWI Institute, Bremerhaven, Unpublished data, researched within the AlgaTerra project 2004.

 

MORPHOLOGY

 

Hippodonta capitata (Ehrenb.) Lange-Bert., Metzeltin & Witkowski
in Iconogr. Diatomol. 4: p. 254. 1996.
[AT_124.24 ] sec. K. Hamann - AWI Institute 2004.
Further pictures in the AlgaTerra Information System
Growth Form: coccoid
Shape Keyword: Lanceolate
Valve Shape:
(Barber & Haworth)		 Lanceolate, wide
 
Symmetry: bilateral symmetric
Apices: broadly subcapitate
Raphe Count: Two median raphes
Raphe Description: filiform
Size Range: n=5  
  Length: Width:
Maximum:   23.5 µm 6.8 µm  
Minimum:  22.5 µm 5.8 µm  
Average 22.9 µm 6.2 µm  
   
  Valve 1:
With Raphe: yes  
Striae Frequency:
(striae per 10 µm)
 n=5  
Maximum: 10.00  
Minimum: 9.00  
Average: 9.40  
Striae Orientation Midvalve: radiate  
Striae Orientation Apices: convergent  
Central Area: elliptic - rectangular  
Axial Area: narrow  
   
Rimoportula: none
Fultoportula: none
Chloroplast Number: 2
Chloroplast Shape: Plate-Like
Chloroplast Position: Parietal
Cell Wall: silicate
Culture Strain: AT_124.24
Culture Collection: AWI
Fact Reference:
Hamann, K. - Unpublished data, researched within the AlgaTerra project 2004.

 

 

ECOLOGY

Hippodonta capitata (Ehrenb.) Lange-Bert., Metzeltin & Witkowski
in Iconogr. Diatomol. 4: p. 254. 1996.
[AT_124.24] sec. K. Hamann - AWI Institute 2004.
 
Continent: Europe
TDWG-Gazetteer: Germany (GER-OO)
Locality: Zarrentiner Becken
Geographic Position: 53°33,00N; 10°55,16E
Climate: Marine (Moist climates with mild winters)
Habitat: Freshwater
Habitat Description: Lake
Life Form: Epipsammic
Alkalinity: Alkaline
pH Value: 8.92
Conductivity: 353 µS cm-1
Water Temperature: 22.6 °C
Nitrogen: Nitrate: >1.76 NO3 µmol L-1
Nitrite: <0.17 NO2 µmol L-1
Ammonium: <5.79 NH4 µmol L-1
Phosphorus: <0.51 µmol PO4 L-1
Silica: 13.77 µmol Si L-1
Fossil: No
Additional Information: mud-sample
Time Span: 29 July 2002
CultureStrain: AT_124.24
Culture Collection: AWI
Fact Reference: Hamann, K. - Unpublished data, researched within the AlgaTerra project 2004.

 

 

 

ALGATERRA Monitoring (EU-WFD HELP DESK)

 

Hippodonta capitata (Ehrenb.) Lange-Bert., Metzeltin & Witkowski

= Navicula capitata Ehrenb.

Identification: Navicula capitata Ehrenb. var. capitata sec. Krammer & Lange-Bertalot 1997a: p. 123, pl. 42: figs 1-4.

Identification: Hippodonta capitata (Ehrenb.) Lange-Bert., Metzeltin & Witkowski sec. Jahn & Kusber 2004: p. 584, fig. 37.

Ecology: Navicula capitata Ehrenb. var. capitata sec. Lange-Bertalot 1996: p. 654: eutraphentic.

Flora/Red List: Navicula capitata Ehrenb. var. capitata sec. Lange-Bertalot 1996: p. 654. Germany: not threatened [Deutschland: derzeit nicht als gefährdet angesehen].

Identification: Hippodonta capitata (Ehrenb.) Lange-Bert., Metzeltin & Witkowski sec. Lange-Bertalot 2001: p. 98, pl- 75: figs 1-6, pl. 77: fig. 17.

German WFD/WRRL: Navicula capitata Ehrenb. sec. Mauch et al. 2003: p. 201 (DV-Nr. 6868).

German WFD/WRRL: Navicula capitata Ehrenb. sec. Mischke 2006 (ID 1188).

AlgaTerra: Hippodonta capitata (Ehrenb.) Lange-Bert., Metzeltin & Witkowski sec. K. Hamann: images http://www.algaterra.org/ATDB/Pictures/PicturePage.cfm?NameId=5286&RefId=0&CFID=799589&CFTOKEN=50688163

BGBM-Diatom-List: Hippodonta capitata (Ehrenb.) Lange-Bert., Metzeltin & Witkowski accepted according to Lange-Bertalot (2001).

 

MOLECULAR DATA

 Hippodonta capitata (Ehrenb.) Lange-Bert., Metzeltin & Witkowski in Iconogr. Diatomol. 4: p. 254. 1996.
  [AT_124.24] sec. K. Hamann - AWI Institute 2004.
   
------------
  Culture Strain No: AT_124.24
  Locus: AT_124.24
  Definition: Hippodonta capitata AT_124.24, 18S rRNA gene sequence.
  Accession: AT_124.24_18S
  Version: AT_124.24_18S.1 [26-04-2004]
  Keywords: 18S rRNA
  Source: Hippodonta capitata
  Organism: Hippodonta capitata Eukaryota; stramenopiles; Bacillariophyta; Bacillariophyceae; Bacillariophycidae; Naviculales; Naviculaceae; Hippodonta
Reference:
  REFERENCE 1 (1746 sites)
AUTHORS K. Hamann
TITLE Phylogenetic position of diatom strains sequenced within the AlgaTerra project.
JOURNAL unpublished
Features:
  FEATURES Location / Qualifiers
source 1..1746
/organism="Hippodonta capitata"
/mol_type="genomic DNA"
/strain="AT_124.24"
rRNA <1..>1746
/product="18S ribosomal RNA"
  Sequence Length: 1746
  Base Count:  454 a 336 c 461 g 495 t
 Origin:     Sequence available but awaiting publication
Plain Sequence:
Sequence available but awaiting publication
 

OCCURRENCE

Hippodonta capitata (Ehrenb.) Lange-Bert., Metzeltin & Witkowski
in Iconogr. Diatomol. 4: p. 254. 1996.
sec. Lange-Bert. in Diatoms of Europe 2. 2001.
Occurrence: Cosmopolitan, including the southern hemisphere, scattered to moderately common in Europe, usually populations with few individuals.
Fact Reference: Lange-Bertalot, H. (2001) - Navicula sensu stricto, 10 genera separated from Navicula sensu lato, Frustulia - Diatoms of Europe 2: 1-526.

 

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page editors: W.-H. Kusber & R. Jahn; this page last updated 11 July 2006

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