LOGIN

RSS Facebook Twitter YouTube
GLOSSARY       

SEARCHGLOSSARY

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

PROFILESEARCH

Nannoperca pygmaea, a new species of pygmy perch (Teleostei: Percichthyidae) from Western Australia

Home Forums Ichthyology Nannoperca pygmaea, a new species of pygmy perch (Teleostei: Percichthyidae) from Western Australia

This topic contains 0 replies, has 1 voice, and was last updated by  Matt 5 years, 4 months ago.

Viewing 4 posts - 1 through 4 (of 4 total)
  • Author
    Posts
  • #302702

    Matt
    Keymaster

    Zootaxa 3637

    Abstract

    A new species of pygmy perch (Percichthyidae) from south-western Australia is described on the basis of 15 specimens
    collected from the Hay River system. Nannoperca pygmaea sp. nov. differs from the sympatric congener N.vittata (Castelnau) by the absence of dark pigment on the ventral surface anterior to the anus, the possession of thin latero-ventral stripes,
    generally fewer dorsal rays and fewer anal rays, hind margin of scales on caudal peduncle without distinct pigment, and
    a more pronounced spot (ocellus) that is surrounded by a halo at the termination of the caudal peduncle. The new species
    is distinguished from congeners Nannoperca australis Günther, N. oxleyana Whitley and N. variegata Kuiter and Allen
    in possessing an exposed and serrated preorbital bone and jaws that may just reach to below the anterior margin of the eye,
    versus a smooth and hidden preorbital and the jaws reaching to at least below the pupil; and from the remaining congener,
    N. obscura (Klunzinger) in possessing a distinct haloed ocellus at base of caudal fin versus an indistinct barring, as well
    as a dark spot behind operculum, and the lack of dusky scale margins. It differs from the other sympatric pygmy perch
    found in the region, N. balstoni Regan, by the presence of an exposed rear edge of the preorbital (vs. hidden under skin),
    fewer transverse scale rows (13 vs. 15–16), small mouth (rarely reaching eye vs. reaching well beyond eye), ctenoid (vs.
    cycloid) body scales, generally fewer pectoral rays and smaller maximum size. Allozyme analyses unequivocally demonstrate that sympatric populations of N. pygmaea sp. nov. and N. vittata belong in different genetic lineages, display no
    genetic intermediates, and are diagnosable by fixed allozyme differences at 15 different loci. Due to its extremely restricted range, where it is known from only 0.06 km², N. pygmaea sp. nov. requires urgent legislative protection.

    #350659

    nuchal man
    Participant

    I’d appreciate a copy if someone has it

     

    Thanks,

    Sam

    #350660

    Stefan
    Member

    Me too please. 

    #350663

    Matt
    Keymaster

    …and me as well. 🙂

Viewing 4 posts - 1 through 4 (of 4 total)

You must be logged in to reply to this topic.