Morfología del camarón postlarval Penaeus (Litopenaeus) vannamei con fórmula rostral 3/0; organización y quetotaxia de la anténula

Abstract

THE ANTENNULE OF PENAEUS (LITOPENAEUS) VANNVAMEI IS COMPOSED OF ONE PEDUNCULE WITH THREE SEGMENTS AND TWO BRANCHES, THE INTERNAL WITH FOUR SEGMENTS AND THE EXTERNAL WITH THREE. SIX TYPES OF CHAETOTAXIAL ELEMENTS WERE FOUND, THE NUMBER VARYING FOLLOWS: 11-15 AESTHETASCS 10-12 SIMPLE SETAE, 47-68 SIMPLE SETULATED SETAE, 16-26 FLEXIBLE SETULATED SETAE, 2-5 SIMPLE SETULATED SETAE WITH GLOBOUS BASE AND ONE SIMPLE-ROBUST SPINE (PARAPENAEID SPINE). THE CONSTANT ELEMENTS ON THE ANTENNULE ARE: ON THE PROXIMAL SEGMENT OF THE PEDUNCULE, ONE SIMPLE AND ROBUST SPINE, THREE LONGITUDINAL FILES OF SIMPLE SETULATED SETAE AND A TRANSVERSE ROW OF FLEXIBLE SETULATED SETAE; ON THE MEDIAL SEGMENT, TWO LONGITUDINAL ROWS OF SIMPLE SETULATED SETAE AND TRANSVERSAL ONE OF FLEXIBLE SETULATED SETAE; ON THE DISTAL PEDUNCULAR SEGMENT, ONE LONGITUDINAL ROW OF SIMPLE SETULATED SETAE AND THREE DISTAL SIMPLE SETAE; ON THE INNER BRANCH, ONE SIMPLE SETAE AND ONE SIMPLE SETULATED ON THE SECOND SEGMENT, TWO SIMPLE SETAE AND ONE SIMPLE SETULATED SETAE ON THE THIRD SEGMENT AND ONE SIMPLE SETULATED SETAE AND TWO SIMPLE SETAE ON THE APEX OF THE FOURTH SEGMENT; ON THE OUTER BRANCH, TWO AESTHETASCS ON THE FIRST SEGMENT, THREE ON TE SECOND ONE AND ON THE THIRD A ROW OF AESTRHETASCS AND TWO APICAL SIMPLE SETAE. THE MORPHOLOGY OF THE ANTENNULE IS COMPARED WITH THOES OF P. (L) VANNAMEI 2/O.P. (L) STYLIROSTRIS 3/0 AND P. (F.) BRASILIENSIS 3/0.