| Title |
Fig. 1. Generalized version of the structure and location of the opercular bones and branchiostegal rays using the example of the common pike perch Sander lucioperca (after: Dzerzhinsky et al., 2013. Figure used with the permission of OOO Educational and Publishing Center “Academy”). Here and in Fig. 2–4 bones of the gill cover: o – operculum, so – suboperculum, int – interoperculum; art – anguloarticulare, bhy – basihyale, d – dentale, ect – ectopterygoideum, ent – entopterygoideum, f – frontale, hy – hyoideum, hyom – hyomandibulare, li – lig. interoperculo-mandibulare, lo – m. levator opercluli, mt – metapterygoideum, mx – maxillare, neur – neurocranium, orb – orbitale, pal – palatinum, prmx – praemaxillare, prop – praeoperculum, q – quadratum, rbr – radii branchiostegii, sy – symplecticum; () – displacement of the opercular bones during contraction of m. levator operculi. |