Spondylopectinidae Kasum-Zade et Romanov, 1987
KASUMZADEH, A. A. & L. F. ROMANOV. 1987. Semeistvo Spondylopectinidae Kasum-Zade et Romanov, fam. nov. v iure iuga SSSR. In: L. A. Nevasskaya (Ed.), Stratigrafiia Verkhnego Fanerozoia Moldavii. Shtiinstsa, Kishinev: 6-16. [p. 7]
«The issue of phylogeny of the new family has not been discussed by the authors because of the absence of consensus of opinion. A. A. Kasum-Zade proposes that both branches of the subfamily Spondylopectininae diverged in the Bajocian from the genus Weyla Bohm, 1919 and subsequently gave rise to the genus Neithea Drouet, 1824.
L. F. Romanov supports the view expressed by Staesche (1926) on the origin of the genera Spondylopecten and Plesiopecten from the genus Pseudopecten, which could have been representatives of the subgenus Echinopecten Brazill, 1895. Representatives of the subgenus Pseudopecten gave rise to the subfamily Radulopectininae. As for the branches of Weyla-Neithea, they form an independent group which had already arisen in the Triassic, from which representatives of the subfamily Radulopectininae diverged in the later Triassic, that is, the genera Indopecten Douglas, 1929 and Iranopecten Repin (in col.).» KASUMZADEH, A. A. & L. F. ROMANOV. 1987. Semeistvo Spondylopectinidae Kasum-Zade et Romanov, fam. nov. v iure iuga SSSR. In: L. A. Nevasskaya (Ed.), Stratigrafiia Verkhnego Fanerozoia Moldavii. Shtiinstsa, Kishinev: 6-16. (Translated by Rosanne D’Aprile Johnson, VIARC, Smithsonian Institution, 8 August 2007) [p. 15]
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