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Glottidia antarctica

Lingulata - Lingulida - Lingulidae

Taxonomy
Lingula antarctica was named by Buckman (1910). It is a 3D body fossil.

It was recombined as Glottidia antarctica by Emig and Bitner (2005).

Synonyms
Synonymy list
YearName and author
1910Lingula antarctica Buckman p. 9 figs. pl. 1, fig. 7
1964Glottidia glauca Chuang p. 157 figs. text figs. 1, 2
1980Lingula antarctica Owen p. 126 fig. 10
1996Lingula antarctica Bitner p. 70 figs. Pl. 18
2005Glottidia antarctica Emig and Bitner p. 424

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Life
Eutriploblastica
Neotriploblastica
Eucoelomata
superphylumLophotrochozoa
Lophophorata
phylumBrachiopodaCuvier 1805
RankNameAuthor
subphylumLinguliformeaWilliams et al. 1996
classLingulataGorjansky and Popov 1985
orderLingulidaWaagen 1885
superfamilyLinguloideaMenke 1828
familyLingulidaeGray 1840
subfamilyGlottidiinaeArchbold 1981
genusGlottidiaDall 1870
speciesantarctica(Buckman 1910)

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

Diagnosis
ReferenceDiagnosis
S. H. Chuang 1964 (Glottidia glauca)Small species with thin, brittle, broad, cream-colored shells with gleaming smooth external surface except for the impres- sions of the large setae. Each shell valve is moderately arched and has subparallel sides which converge slightly and very gradually in the anterior two-thirds of its length. The anterior margin of the shell is curved in the young but truncate in later stages. On the inner surface at the posterior part of the ventral valve are two widely divergent laminae arranged symmetrically on either side of the sagittal plane with their anterior end midway between the sagittal plane and the lateral shell edge. A broad low median ridge lies inside the V-shaped area bounded by the laminae and extends posteriorly into the poste- rior third of this area. The inner surface of the dorsal shell valve is unknown.
C. C. Emig and M. A. Bitner 2005Ventral valve: umbonal region slightly acuteangled with a rather rounded beak and a subparallel pedicle groove that is not continuous with the inner valve side; anterior and median internal oblique muscles similarly elongate; posterior internal oblique muscle rounded; posterior adductor muscles centred over the septa; two oblique septa, widened and curved, the left septum slightly longer than that on the right and generally more arcuate; both septa originating posteriorly at the level of the pedicle groove edges. Dorsal valve: narrow dorso-central ridge at the level of the anterior oblique muscles; umbonal region slightly acute with a rather rounded beak. Anterior mantle canals oblique, curved forward concavely. Text-figure 3 is part of this diagnosis, mainly for the muscle arrangement and the disposition of the mantle canals and septa.