FIGURE 1 a–b in Identification of past and present gobies: distinguishing Gobius and Pomatoschistus (Teleostei: Gobioidei) species using characters of otoliths, meristics and body morphometry

FIGURE 1 a–b, Schematic drawing of a goby skeleton depicting the standard morphometric (1a) and meristic (1b) characters used in this study; c–d, Schematic drawing (c) and SEM image (d) of a right goby otolith (based on G. bucchichi) showing the measured distances and areas (after Gierl et al., 2018) and the established otolith terminology. Colors in a: red, horizontal measurements; blue, measurements along fin bases; green vertical measurements. Abbreviations: (a) Ab, length of anal fin base; B, body depth at origin of first dorsal fin; CP, length of caudal peduncle; D2b, length of second dorsal fin base; D2C, distance between end of second dorsal fin and first dorsal (procurrent) ray of caudal fin; SL, standard length (from snout to begin of caudal fin); SN/A, distance from snout to origin of anal fin; SN/D1, distance from snout to origin of first dorsal fin; SN/D2, distance from snout to origin of second dorsal fin; TL, total length; (b) AbVert, abdominal vertebrae; AP, anal fin pterygiophores inserting in front of haemal spine of first caudal vertebra; Arays, rays of anal fin; CaudVert, caudal vertebrae; D2rays, rays of second dorsal fin; DProCur, dorsal procurrent rays; VProCur, ventral procurrent rays; (c) OA, otolith area; OH, otolith height; OL, otolith length; OP, otolith perimeter; SuA, sulcus area; SuH, sulcus height; SuL, sulcus length; SuP, sulcus perimeter; SuEndV, vertical distance from posterior end of sulcus to ventral margin of otolith; SuTipV, vertical distance from anterior end of sulcus to ventral margin of otolith.