FN Archimer Export Format PT J TI Gill Development and Its Functional and Evolutionary Implications in the Blue Mussel Mytilus edulis (Bivalvia: Mytilidae) BT AF CANNUEL, Rozenn BENINGER, Peter G. MCCOMBIE, Helen BOUDRY, Pierre AS 1:1;2:1;3:2;4:3; FF 1:;2:;3:;4:PDG-DOP-DCB-PFOM-PI; C1 Univ Nantes, Fac Sci, Marine Biol Lab, F-44322 Nantes 3, France. Bangor Univ, Ctr Appl Marine Sci, Menai Bridge LL59 5AB, Anglesey, Wales. IFREMER, Lab Genet & Pathol, F-17390 La Tremblade, France. C2 UNIV NANTES, FRANCE UNIV BANGOR, UK IFREMER, FRANCE SI BREST SE PDG-DOP-DCB-PFOM-PI IN WOS Ifremer jusqu'en 2018 copubli-france copubli-europe copubli-univ-france IF 1.942 TC 35 UR https://archimer.ifremer.fr/doc/2009/publication-6935.pdf LA English DT Article AB Study of gill development in bivalve larvae and postlarvae provides information on the evolution of this organ and feeding mechanisms of early stages. Scanning electron microscopy was used to document the development of the filibranch homorhabdic gill in hatchery-reared larval, postlarval, and juvenile Mytilus edulis. Four key stages were identified during gill development: (1) transfer of the particle collection function from velum to gill at metamorphosis, with subsequent elongation of the gill filaments to form a gill basket, with complete frontal ciliation; (2) reflection of the inner demibranchs, and transition to a V-shaped gill; (3) delayed development of the outer demibranchs, occuring simultaneously along the gill axis, with transition to the adult final W-shape; and (4) formation of the ventral particle grooves and concomitant acquisition of dense abfrontal ciliation. These key stages signal shifts in the mechanisms of particle processing during the early development of M. edulis. Gill development in the homorhabdic filibranch M. edulis was similar to that of the early homorhabdic stages of the heterorhabdic filibranchs studied to date (Pectinidae), but different from that of the pseudolamellibranchs (Ostreidae), suggesting divergent evolution of this character. Similarly, the systems responsible for gill cohesion and structural integrity are common to both the homorhabdic and heterorhabdic filibranchs, suggesting evolutionary proximity, but they are patently different from those of the eulamellibranchs and pseudolamellibranchs, suggesting evolutionary divergence. PY 2009 PD OCT SO Biological bulletin SN 0006-3185 PU Marine Biological Laboratory VL 217 IS 2 UT 000271594900007 BP 173 EP 188 ID 6935 ER EF