Fecundosquama Valiukevičius, 2004

Valiukevičius, Juozas & Burrow, Carole J., 2005, Diversity of tissues in acanthodians with Nostolepis-type histological structure, Acta Palaeontologica Polonica 50 (3), pp. 635-649 : 646

Genus Fecundosquama Valiukevičius, 2004

Type and only species: Fecundosquama basiglobosa Valiukevičius, 2004 ; Lithuania, Kurtuvėnai−162 borehole, depth 1052.2–1072.4 m; Upper Silurian , Pridoli , Minija Formation and the lower part of Jûra Formation .

Diagnosis.—Scales of moderate size (ca. 0.8 mm wide) having low horizontal crowns with crenulated sculpture of five to six notches per side anteriorly (flank) or around the entire crown margin (head scales), lacking a neck; deep convex/subglobular base protrudes beyond the crown on all sides. Scale crowns composed of odontocytic bone−like mesodentine with abundant osteocyte cavities and enlarged radial and ascending vascular canals present in the oldest growth lamellae only. Crown mesodentine merges gradually into a highly cellular thin−lamellar bone in the base that is penetrated by long traces of Sharpey’s fibres.