Ixa, Leach, William Elford, 1815

Leach, William Elford, 1815, A tabular view of the external characters of four classes of animals, which Linné arranged under Insecta; with the distribution of the genera composing three of these classes into orders, & c. and descriptions of several new genera and species, Transactions of the Linnean Society of London 11, No. 2, pp. 306-400 : 334

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