Turbellaria --- Distribution records
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for Castrella vernalis
| site | collection date | depth | substrate | salin | locality kind | comments | reference | |
|---|---|---|---|---|---|---|---|---|
 | Perm (Perm'), Russia | 1921 or earlier | default type | Perm, 29 April, in geringer Zahl zusammen mit Microdalyellia nanella; offenbar eine Frühlingsform wie diese. | Beklemischev VN (1921) from Luther 1955 - p. 288 |