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New species of leaf fish Nandus meni (Perciformes: Nandidae) from Noakhali, Bangladesh

2013; Taylor & Francis; Volume: 23; Issue: 3 Linguagem: Inglês

10.1080/21658005.2013.817517

2165-8013

M. Shahadat Hossain, Subrata Sarker,

Ichthyology and Marine Biology

Abstract Nandus meni sp. nov. is described from the Meghna deltaic region in Noakhali, Bangladesh, after a detailed morphological examination and careful comparisons with other geographically proximate congeners. N. meni can be readily diagnosed by having the following combination of characters: total length 114.1–142.4 mm, standard length (SL) 94.1–117.3 mm, body depth at anus 29.0–32.9% of SL, head length (HL) 39.6–42.2% of SL, a dark spot on the caudal peduncle, a concave ventral portion of the body, gill arch V-shape, greenish body colour, 9–11 pectoral fin rays, snout length 24.5–33.1% of HL and eyes diameter 18.1–20.4% of HL. The new species N. meni differs from other congeners in having greenish body colour, smaller eyes, a concave ventral body, a V-shaped gill arch and a dark spot on the caudal peduncle. Aprašoma Meghna deltos regione (Noakhali, Bangladešas) aptikta nauja žuvų rūšis Nandus meni sp. nov. Rūšies išskyrimas paremtas išsamiu morfologiniu tyrimu ir palyginimu su kitomis geografiškai artimomis tos pačios genties rūšimis. N. meni apibūdinama pagal šiuos požymius: bendras ilgis 114,1–142,4 mm, kūno ilgis 94,1–117,3 mm, kūno plotis prie analinės angos 29,0–32,9% kūno ilgio, galvos ilgis 39,6–42,2% kūno ilgio, tamsi dėmė ant uodegos stiebelio, pilvinė kūno dalis įgaubta, žiaunų lankas V raidės formos, kūno spalva žalsva, krūtininis pelekas su 9–11 spindulių, nosies ilgis 24,5–33,1% galvos ilgio, akių dydis 18,1–20,4% galvos ilgio. N. meni skiriasi nuo kitų tos pačios šeimos rūšių žalsva kūno spalva, mažesnėmis akimis, įgaubta pilvine kūno dalimi, V formos žiaunų lanku ir tamsia dėme ant uodegos stiebelio. Keywords: leaf fish Nandus new speciesNandidaeBangladesh Acknowledgements The authors thank the authority of the University of Chittagong for a research grant, Ref. No. 123/Acc-11-12 (B). Thanks are also extended to local fishers, fish traders and residents for their support and cooperation in the field.