Published December 31, 2011 | Version v1
Taxonomic treatment Open

Aspidiophorus ophiodermus Balsamo 1982

Description

Aspidiophorus ophiodermus Balsamo, 1982

(Figure 3)

Localities. Artificial ponds, Fiskebäckskil, Bohuslän (N 58º 14’ 39’’; E 11º 27’ 16’’); Among Lemna sp., Lower Lake Rudan, Handen, Södermanland (N 59º 09’ 27’’; E 18º 07’ 31’’).

Material. 3 specimens. TL, 160–180 µm; FL, 18–20 µm; AL, 9–10 µm; PhL, 35–41 µm; MD, 5 µm; DC, 40– 45; DR, 49–51; VC, ~10; VTS, 8 x 4–5 µm; PL, 0.5 µm.

A rather slim and elongated species with rounded to weakly three-lobed head. Cephalion well developed. One pair of cephalic ciliary tufts with one cilium considerably longer than the others. Two pairs of dorsal sensory bristles. The dorsal scales are longitudinal elliptical and keeled. The posteriormost scales are keeled but not pedunculated and larger than the others. Ventral interciliary field with a pair of large suboval keeled terminal scales and approximately 10 columns of keeled scales; their borders could not be seen. Ventral ciliation in two longitudinal bands that are further divided on the head, but not merging. Pharynx widens towards the pharyngeal intestinal junction. The Swedish specimens, all in parthenogentic phase with large eggs, fall within the ranges of literature data but are in general larger than most previously recorded specimens. The anteriormost part of the intestine has a granulated appearance, also recorded in Polish specimens (Kisielewski 1986).

Previously recorded from Great Britain (Martin 1990), Italy (Balsamo 1983), Poland (Kisielewski 1998), Russia (Tretjakova 1989) and Brazil (Kisielewski 1991).

Notes

Published as part of Kånneby, Tobias, 2011, New species and new records of freshwater Chaetonotida (Gastrotricha) from Sweden, pp. 29-55 in Zootaxa 3115 on pages 34-35, DOI: 10.5281/zenodo.206874

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Linked records

Additional details

Biodiversity

Family
Chaetonotidae
Genus
Aspidiophorus
Kingdom
Animalia
Order
Chaetonotida
Phylum
Gastrotricha
Scientific name authorship
Balsamo
Species
ophiodermus
Taxon rank
species
Taxonomic concept label
Aspidiophorus ophiodermus Balsamo, 1982 sec. Kånneby, 2011

References

  • Balsamo, M. (1982) Three new gastrotrichs from a Tuscan-Emilian Apennine lake. Bollettino di Zoologia, 49, 287 - 295 (1983).
  • Kisielewski, J. (1986) Taxonomic notes on freshwater gastrotrichs of the genus Aspidiophorus Voigt (Gastrotricha, Chaetonotoidea) with description of four new species. Fragmenta Faunistica, 30, 139 - 156.
  • Martin, L. V. (1990) Further observations on Gastrotrichs in Surrey and a provisional British list. Microscopy, 36, 415 - 425.
  • Balsamo, M. (1983) Gastrotrichi. In: Consiglio Nazionale delle Ricerche. Guide per il riconoscimento delle specie animali delle acque interne italiane, 20, 1 - 92.
  • Kisielewski, J. (1998) Brzuchorzeski (Gastrotricha). Fauna Slodkowodna Polski, Zeszyt 31. Windawnictwo Uniwersytetu Lodzkiego, Lodz, 157 pp.
  • Tretjakova, E. I. (1989) K poznaniju fauny presnovodnych gastrotrich Evropejskoj casti SSSR. Gosudarstvennyj Komitet SSSR po Narodnomu Obrazovaniju, redkollegija zurnala " Biologieeskie Nauki, udk 595.132 (maszynopis, 21 pp).
  • Kisielewski, J. (1991) Inland-water Gastrotricha from Brazil. Annales Zoologici Warszawa, 43, 1 - 168.