Figure 1.
Map of the Tucano Basin, State of Bahia, Brazil, indicating the location of the fossils localities of the Marizal Formation in Euclides da Cunha and Cícero Dantas.
Cretaceous strata in green.
Figure 2.
†Nanaichthys longipinnus nov. gen. and sp. Holotype DGM.1016-P.
A) photograph; B) inversed peeling model; C) anatomical drawing. Scale bar equals 10 mm.
Figure 3.
†Nanaichthys longipinnus nov. gen. and sp. DGM.535-P. Scale bar equals 5 mm.
Figure 4.
†Nanaichthys longipinnus nov. gen. and sp. DGM.1016-P, Holotype.
A) photograph of the head region; B) inversed peeling model; C) anatomical interpretations. Abbreviations: Asph, autosphenotic; Brstg, branchiostegals; Cl, cleithrum; Fr, frontal; Hyo, hyomandibula; Den, dentary; Ecptg, ectopterygoid; Enptg, endopterygoid; Le, lateral ethmoid; Mtptg, metapterygoid; Mx, Maxilla; Op, opercle; Pa, left parietal; PMx, premaxilla; Pop, preopercle; Psph, parasphenoid; Pto, pterotic; Qua, quadrate; Sca+Cor, scapula + coracoids; Soc, supraocciptal; Sop, subopercle; Sor, supraorbital; Sym, sympletic; Vo, vomer. Scale bar equals 2 mm.
Figure 5.
†Nanaichthys longipinnus nov. gen. and sp. DGM.535-P.
A) photograph of anal fin; B) anatomical interpretation. Abbreviations: p.pr, proximal pterigiophore; m.pr, medial pterigiophore. Scale bar equals 1 mm.
Figure 6.
†Nanaichthys longipinnus nov. gen. and sp. DGM.535-P.
Photograph of caudal fin. Scale bar equals 1 mm.
Figure 7.
†Nanaichthys longipinnus nov. gen. and sp. DGM.535-P.
A) inversed caudal fin peeling; B) anatomical interpretation. Abbreviations: PU1, preural centrum 1; UN1-2, uroneurals 1–2; EP1-2, epurals 1–2; H1-6, hypurals 1–6; PHy, parhypural; U1-2, ural centrum 1–2; naPU1?, neural arch of preural centrum 1; r, displaced caudal rays. Scale bar equals 1 mm.
Table 1.
Character states for †Nanaichthys longipinnus. All the characters presented here correspond to those presented by [15].
Figure 8.
Area cladogram and strict consensus tree of the Chanidae based on 84 four most parsimonious trees with 233 steps (CI = 0.687, HI = 0.313 RI = 0.822, and RC = 0.564).
Nodes 1) Gonorynchiformes; 4) Chanidae; 5) Chanini; 6) Rubiesichthyinae. Asterisks denote collapsed monophyletic clades not directly relevant to the discussion.
Figure 9.
Area cladogram of the Gonorynchiformes and Early Cretaceous Paleogeography.