Comments on the cranial and pectoral girdle osteology of Lepidotes gigas (Actinopterygii, Lepisosteiformes) from the Lower Jurassic (lower Toarcian) of Germany

Figures & data

FIGURE 1. Lepidotes gigas Agassiz, 1832, FWD_1098 (part). A, transfer-prepared specimen in left lateral view, dusted with ammonium chloride for photography; B, cephalic and pectoral girdle skeleton of the same; C, drawing of cephalic and pectoral girdle skeleton. Abbreviations: Ang, angular; Art, articular; Cl, cleithrum; Cla, anterior clavicle element; Clp, posterior clavicle element; Dpal, dermopalatine; Dspl, dentalosplenial; Epi, epiotic; Ex, extrascapular; Exo, exoccipital; hpl, horizontal pit-line of the cheek; Hym, hyomandibula; Io, infraorbital; Iop, interoperculum; mf, maxillary foramen; Mtp, metapterygoid; Mx, maxilla; Na, nasal; Op, operculum; Pa, parietal; p.bas, processus basipterygoideus; pccll, pores of the canal for the cephalic lateral line; pcio, pores of the canal for the infraorbital sensory line; Pcl, postcleithrum; pcoio, pores of the canal for the otic section of the infraorbital sensory line; pcpocll, pores of the canal for the postotic section of the cephalic lateral line; pcsc, pores of the canal for the supratemporal commissure; pcsop, pores of the canal for the supraorbital sensory line; pmdc, pores of the mandibular canal; Pmx, premaxilla; poc, pores of the “oral” canal; Pop, preoperculum; Ppa, postparietal; ppc, pores of the preopercular canal; ppl, posterior pit-line of the skull roof; Pro, prootic; Pt, posttemporal; Qu, quadrate; Quj, quadratojugal; Sang, surangular; Smx, supramaxilla; Sob, suborbital; Sop, suboperculum; Stta, supratemporotabular; Sym, symplectic; Vo, vomer; vpl, vertical pit-line of the cheek; (l), left; (r), right.

FIGURE 2. Lepidotes gigas Agassiz, 1832, FWD_1098 (part). A, skull and pectoral girdle in left lateral view, white squares indicate position of details shown in B, C, and D, dusted with ammonium chloride for photography; B, left maxilla showing a large slot-like foramen on its anterior part; C, anterior clavicle element (anterior serrated appendage) being intermingled with remains of branchiostegal rays; D, posterior clavicle element (posterior serrated appendage) lying on external surface of ventral arm of left cleithrum.

Agassiz, L. J. R. (1832). Untersuchungen über die fossilen Fische der Lias-Formation. Neues Jahrbuch für Mineralogie, Geognosie, Geologie und Petrefaktenkunde, 3, 139–149.

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DATA AVAILABILITY STATEMENT

The author confirms that the data supporting the findings of this study are available within the article.