Figure 6. – Polypterus senegalus (male, 260 mm TL). A: Posterior side of the shaft showing, in the median groove, three branches of the lepidotrichium: the primary branch and two secondary branches going out of the median grove. B-C: Respectively lateral and sagittal axial sections of a finlet spine showing the vascular network (B: in black) and the insertion (in C) of the branches of the lepidotrichium (modified from Meunier, 1980). Scale bars = 1 mm.

Published as part of Meunier, François J. & Gayet, Mireille, 2020, Comparative morphology of the finlet spines of the extant Polypteridae (Osteichthyes; Cladistia). Systematic interest, pp. 19-37 in Cybium 44 (1) on page 25, DOI: 10.26028/cybium/2020-441-003, http://zenodo.org/record/10493383