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Conotheca australiensis

Orthothecida - Circothecidae

Taxonomy
Conotheca australiensis was named by Bengtson et al. (1990) [Bengston in Bengston et al. 1990]. It is not a trace fossil.

Synonyms
Synonymy list
YearName and author
1990Conotheca australiensis Bengtson et al. p. 216 figs. 143, 144
1996Conotheca laurentiensis Landing and Bartowski p. 756 figs. 7.1–7.8, 7.20
2001Conotheca australiensis Gravestock et al. p. 98 figs. Pl. X, figs. 1, 2
2001Conotheca australiensis Qian et al. figs. pl. 1 f. 6-10
2004Conotheca australiensis Malinky and Skovsted pp. 572-574 fig. 14

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Eutriploblastica
Neotriploblastica
Eucoelomata
superphylumLophotrochozoa
RankNameAuthor
Lophophorata
phylumHyolitha
orderOrthothecida
familyCircothecidae
genusConotheca
speciesaustraliensis

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
J. M. Malinky and C.B. Skovsted 2004Gently tapering conch with small apical angle of about 15°; conch may have slight helical coil; aperture is planar and lying in a plane perpendicular to long axis of conch. Shell covered with closely though irregularly spaced transverse lines of varying intensity in different places on conch; apical termination unknown.

Operculum circular in outline; exterior with rounded summit that may be lower than surrounding surface; exterior may have coarse concentric lines; interior with two cardinal processes that diverge at angle of about 50°; cardinal processes broad at base but taper to eventually terminate in blunt rounded surface; emanating from the cardinal processes is a circular ridge set inward from edge of operculum. Interior otherwise smooth.