Traits taxon details
original description
(of Unio modiolaris J. De C. Sowerby, 1840 †) Sowerby, J. De C. (1840). Fossil shells from the coal-measures described and engraved by Mr. James de Carle Sowerby, F.L.S. In: Prestwich, J. The Geology Of Coalbrook Dale. <em>Transactions of the Geological Society of London, Series 2.</em> 5: pls. XXXIX and XL., available online at https://www.biodiversitylibrary.org/page/36236109 page(s): pl. 39, fig. 10 [details]
basis of record
Betekhtina, O. A. (1990). Evolyutsionnaya posledovatel'nost' i ekologicheskaya izmenchivost' nemorskikh dvustvorchatykh mollyuksov v pozdnepaleozoyskikh uglenosnykh basseynakh razlichnogo tipa [Evolutionary sequence and ecological variability of non-marine bivalves in late Paleozoic coal-bearing basins of various types]. In: Betekhtina, O. A.; Zhuravleva, I. T. (eds) Sreda i zhizn' v geologicheskom proshlom. Aspekty evolyutsii organizmov i sredy [Environment and life in the geological past. Aspects of the evolution of organisms and the environment]. Nauka, Novosibirsk, pp. 84-91. [details] Available for editors 
additional source
Trueman, A. E.; Weir, J. (1946-1968). A Monograph of British Carboniferous non-marine Lamellibranchia. 13 parts. Monograph of the Palaeontographical Society London. Palaeontographical Society London, London, 449 pp. [Part I (1946), Part II (1947, Part III (1947), Part IV (1948), Part V (1951), Part VI (1952), Part VII (1954), Part VIII (1955, Part IX (1956); by Weir only, Part X (1960), Part XI (1966), Part II (1967), Part XIII (1968)]. page(s): 353-357, pl. 37, fig. 37, pl. 38, figs 16-21 [details]
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