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Phreatophasma Efremov, 1954

Source

Rank

genus

species:4819466

Trud. paleont. Inst. Akad. Nauk SSSR, 54, 316.

Classification

Caseidae Williston, 1912
- Phreatophasma Efremov, 1954
  - Phreatophasma aenigmaticum