Project 2068: T. P. Carvalho, J. S. Albert. 2011. Redescription and phylogenetic position of the enigmatic Neotropical electric fish Iracema caiana Triques (Gymnotiformes: Rhamphichthyidae) using x-ray computed tomography. Neotropical Ichthyology. 9 (3):457-469.

Abstract

We redescribe Iracema caiana, a monotypic genus of the gymnotiform electric fish family Rhamphichthyidae. Iracema is known only from the type series (holotype and three paratypes) collected from the rio Jauaperi, affluent to the rio Negro in the Amazon basin, and was never collected again. Previous morphological studies were limited to features of external morphology.
To study the osteology of Iracema we examined two specimens of different sizes using high-resolution x-ray computed tomography, a non-invasive and non-destructive technique to visualize internal anatomical structures. We describe and illustrate the osteology of Iracema caiana, and present data on morphometrics and external morphology. Contrary to previous hypotheses we propose that Iracema is the sister group to Rhamphichthys based on four synapomorphies: intermuscular bones present in the adductor mandibulae, reticulated texture of opercles, fully ossified Baudelot’s ligaments, and elongate scales above the lateral line in the posterior portion of the body.


Read the article »

Article DOI: http://dx.doi.org/10.1590/S1679-62252011000300001

Project DOI: 10.7934/P10459, http://dx.doi.org/10.7934/P10459
This project contains
  • 4 Media
  • 1 Taxon
  • 1 Specimen
Total size of project's media files: 19 MB

Download Project SDD File
Currently Viewing:
MorphoBank Project 2068

    This research
    supported by



    Members

    member name taxa specimens media media
    notes
    Tiago Carvalho
    Project Administrator
    Last logged in 11/08/14
    1142


    Project has no matrices defined.



    Project views

    type number of views Individual items viewed (where applicable)
    Total project views11578
    Project overview2654
    Media views5891Media search (3651 views); M346491 (718 views); M346490 (514 views); M346489 (501 views); M346492 (507 views);
    Specimen list1097
    Taxon list1256
    Bibliography679
    Documents list1




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project180
    Media downloads6M346491 (3 downloads); M346490 (2 downloads); M346489 (1 download);
    Project downloads174