Table 1 in Revision of Eocene electric rays (Torpediniformes, Batomorphii) from the Bolca Konservat-Lagerst atte, Italy, reveals the first fossil embryo in situ in marine batoids and provides new insights into the origin of trophic novelties in coral reef fishes

Table 1. Morphometric data for all examined specimens of † Titanonarke Carvalho, 2010 from the Eocene Monte Postale site, Bolca Lagerst¨atte. Abbreviations (see the morphological scheme in the Supplemental material): AOW, antorbital cartilage width; CFL, caudal fin length; CFD, caudal fin depth; CLO, clasper length; CPD, caudal peduncle depth; D1B, first dorsal fin base length; D2B, second dorsal fin base length; DCS, dorsal caudal space; DL, disc length; DW, disc width; HL, head length; IDS, interdorsal space; MOW, mouth width; P2A, pelvic fin anterior margin length; P2B, pelvic fin base length; P2S, pelvic fin span; PCS, space from pelvic fin insertion to the caudal fin origin; PD1, predorsal distance up to the first dorsal fin; PD2, predorsal distance up to the second dorsal fin; PDI, pelvic fin insertion to first dorsal fin origin; PDO, pelvic fin origin to first dorsal fin origin; PGW, snout tip to the level of the greatest disc width; PIW, body width at pectoral fin insertions; POR, preoral length; PP2, prepelvic length; SL, standard length; TAL, tail length; TBW, tail base at pelvic fin origin; TL, total length.
† Titanonarke molini (Jaekel, 1894)† Titanonarke megapterygia sp. nov.MGP-PD 26275/6MCSNV IG.VR.67290MCSNV IG.91128/9MCSNV IG.135581MCSNV IG.VR.91359MCSNV IG.135576Measurementsmm% SLmm% SLmm% SLmm % SLmm% SLmm% SLAOW206.625.3217.429.0196.223.126.1–28.128.4174.227.8CFL80.99.9––75.08.8––––97.415.6CFD28.43.5––26.13.1––––36.05.8CLO––––70.58.3––––––CPD20.22.525.53.415.91.9––2.32.313.72.2D1B––64.68.656.66.7––––––D2B50.06.147.96.451.36.0––––––DCS140.217.2109.814.6119.314.0––––––DL353.143.2341.245.5371.643.733.8–42.843.2334.553.4DW387.047.4406.654.2347.840.9––56.356.9349.855.9HL178.121.8172.523.0204.424.022.2–23.623.8171.827.4IDS––53.67.1–––––––MOW80.69.999.913.395.511.213.6–12.712.887.113.9P2A77.29.5103.113.788.710.4––8.18.2141.622.6P2B134.616.5108.314.481.39.6––11.711.8107.917.2P2S206.825.3208.527.8––––23.723.9211.933.8PCS356.043.6358.547.8––––44.945.4241.738.6PD1––468.162.4––––––––PD2632.377.4586.378.2––––––––PDI––83.111.1––––––––PDO––181.324.2––––––––PGW198.424.3187.225.0195.223.0––23.723.9172.227.5PIW150.318.4173.723.2180.321.2––22.122.3173.027.6POR73.08.962.68.385.410.07.7–9.69.756.29.0PP2328.540.2307.341.0348.441.034.8–44.444.8299.047.7SL816.8100.0750.2100.0850.4100.0––99.0100.0626.2100.0TAL493.560.4436.858.2502.059.0––55.456.0318.350.8TBW94.811.6109.714.6132.715.6––13.213.3103.516.5TL897.7109.9––925.4108.8––––722.6115.4