Cananéia Mullet

description

Description. Morphometric data presented in Table 1. Maximum examined body length 209 mm SL. Body elongate, compressed and moderately deep compared to congeners. Greatest body depth at vertical through spinous dorsal-fin origin. Dorsal profile of head and body slightly convex along tip of snout, straight from vertical through anterior border of orbit to vertical through spinous dorsal-fin origin, slightly convex from that point to caudal peduncle, concave along caudal peduncle. Ventral profile of head and body convex from tip of lower jaw to caudal peduncle, concave along caudal peduncle. Orbital diameter greater than snout length. Eye covered with adipose tissue, except for narrow oval-shaped central area in adults. Adipose tissue small to almost absent in specimens shorter than 30 – 35 mm SL. Anterior spinous dorsal fin with 4 slender spines connected by membrane, n = 138. Spinous dorsal fin-origin about midway between snout tip and caudal-fin base. Posterior soft dorsal-fin rays in specimens smaller than 30 – 35 mm SL ii, 7, n = 45; i, 8 in adult specimens, n = 93. Unbranched pectoral-fin rays ii; first ray much smaller than second; branched rays 12 – 14, 13, n = 138. Tip of pec

Taxonomic review of the species of Mugil (Teleostei: Perciformes: Mugilidae) from the Atlantic South Caribbean and South America, with integration of morphological, cytogenetic and molecular data

diagnosis

Diagnosis. Mugil brevirostris is the only species from the study area having the pectoral fin reaching to, or extending slightly beyond, the vertical through the dorsal-fin origin (vs. tip of the pectoral fin not reaching the vertical through the dorsal-fin origin). Mugil brevirostris is additionally distinguished from M. liza, M. curvidens and M. trichodon in having 3 spines and 9 branched anal fin rays in adults or 2 spines, 1 unbranched and 9 branched anal fin rays in juveniles (vs. 3 spines and 8 branched anal fin rays in adults or 2 spines, 1 unbranched and 8 branched anal fin rays in juveniles) and from M. incilis in having the dorsal-fin origin located midway between the snout tip and the caudal-fin base and 35 – 38 oblique scale rows between the dorsal limit of the pectoral-fin base to the caudal-fin base (vs. the dorsal-fin origin closer to the snout tip than to the caudal-fin base and 41 – 44 oblique scale rows from the dorsal origin of the pectoral fin base to the caudal-fin base). Mugil brevirostris additionally differs from M. margaritae in having 35 – 38 oblique scale rows from the dorsal limit of the pectoral-fin base to the caudal base (vs. 40 – 44 oblique scale row

Taxonomic review of the species of Mugil (Teleostei: Perciformes: Mugilidae) from the Atlantic South Caribbean and South America, with integration of morphological, cytogenetic and molecular data

discussion

Remarks. No specimen that could be identified as type-material of Querimana brevirostris was found in the collection of the Museu Nacional, Rio de Janeiro, despite a careful, approximately six months search by Marcelo Britto, ichthyologist and curator of that institution. One specimen (MNRJ 2021) in very poor condition which had been identified by Alípio de Miranda Ribeiro as Querimana brevirostris, but not cited as a type, is smaller (total length = 30 mm) than specimens used by Ribeiro, 1915 in his original description (several specimens from an unknown locality in Brazil measuring 53 mm in length). Nine specimens (MNRJ 2977) from Baía da Guanabara, Rio de Janeiro, SL 32 – 37.5 mm, also identified as Querimana bevirostris are rather Mugil curvidens Valenciennes. In Ribeiro’s original description there is a clear reference to the tip of the pectoral fins reaching the vertical through the origin of the first dorsal-fin spine and the presence of 33 “ lateral line ” scales. The only species of Mugil that has long pectoral fins, reaching to, or extending slightly beyond, the vertical through the base of the first dorsal-fin spine is Mugil hospes Jordan & Culver, described from Sinaloa

Taxonomic review of the species of Mugil (Teleostei: Perciformes: Mugilidae) from the Atlantic South Caribbean and South America, with integration of morphological, cytogenetic and molecular data

materials_examined

Material examined. Neotype — MZUSP 115087, SL 106 mm, Cananéia, São Paulo, 25 ° 00 ’ 45 ” S, 47 ° 56 ’ 07 ” W. Other material. MZUSP 30333, 31446, 4, SL 71 – 101.5 mm, Brazil, Amapá: approximately 1 ° 26 ’ N, 52 ° 01 ’ W; MZUSP 77667, 20, SL 24.5 – 52 mm, Pará: Salvaterra, Praia do Jubim, 0 ° 45 ’ 31.6 ” S, 48 ° 30 ’ 51.6 ” W; MZUSP 67402 - 03, 3, SL 135 – 156 mm, Maranhão: Ilha de São Luís, Rio Curuçá, approximately 2 ° 31 ’ S, 44 ° 16 ’ W; MZUSP 67409, 67408, 67404, 4, SL 142 – 171 mm, Alagoas: Lagoa Mundaú, 9 ° 38 ’ 28 ” S, 35 ° 46 ’ 44 ” W, MZUSP 51159, 2, SL 144 and 183 mm, Coqueiro Seco, 09 ° 38 ’ 14 ” S, 35 ° 47 ’ 07 ” W; MZUSP 115075,1, SL 209 mm, Maceió, 9 ° 24 ’ S, 35 ° 31 ’ W; MZUSP 67336, 30, SL 78 – 100 mm, Bahia: mouth of Rio Paraguaçu, near Maragogipe, 12 ° 7.5 ’ S, 38 ° 09 ’ W; MZUSP 115076, 1, SL 100 mm, Rio de Janeiro: Baía da Ilha Grande, 23 ° 09 ’ 07.5 ” S, 44 ° 13 ’ 44 ” W; MZUSP 15076, 2, SL 64 and 66 mm, Atafona, 21 ° 36 ’ S, 41 ° 01 ’ W; MZUSP 67319, 27, SL 22 – 88 mm, Atafona, Ilha da Convivência, 21 ° 36 ’ S, 41 ° 02 ’ W; MZUSP 43717, 67383, 67393, 67406, MZUSP 115078) 10, SL 52 – 193 mm, São Paulo: Cananéia, 25 ° 00 ’ 45 ” S, 47 ° 56 ’ 07 ” W; MZUSP 67407

Taxonomic review of the species of Mugil (Teleostei: Perciformes: Mugilidae) from the Atlantic South Caribbean and South America, with integration of morphological, cytogenetic and molecular data