This page serves supplemental imagery for a paper entitled The Comparative Osteology and Phylogenetic Relationships of African and South American Lungfishes (Sarcopterygii: Dipnoi), by K.E. Criswell (2015, Zoological Journal of the Linnean Society, 174, 801-858). The abstract is as follows:
Lepidosirenidae is a clade of freshwater lungfishes that include the extant South American Lepidosiren paradoxa Fitzinger, 1837 and African species of the genus Protopterus. These genera have been geographically separated since the break-up of Gondwana in the Early Cretaceous, but they display similar biology and morphology. Species were distinguished by a combination of features such as head-to-body ratios, the number of pairs of ribs, and the presence of external gills, but no discrete skeletal characters were identified, and no comparative studies including all extant species have been published. I used computed tomography (CT), X-ray photography, and specimens from museum collections to describe the skeletal morphology of all species of lepidosirenid in a comparative context. I digitally disarticulated the bones in each specimen to compile a comparative atlas of the cranial and pectoral elements of all extant lungfishes, which has the potential to increase the correct identifications of specimens in museum collections. The morphology of the frontoparietal, parasphenoid, supraorbital, and suboperculum differ between species. I used those characters, along with molecular sequence data from the ribosomal RNA gene 16S, to run combined morphological and molecular phylogenetic analyses. Lepidosirenidae is monophyletic in all analyses, but the interrelationships of the species of Protopterus vary with the different sources of character data.
About the Species
This specimen was acquired at the Kin Market in Ngamanzo, Kinshasa, Democratic Republic of the Congo on 5 April 2007. It was made available to The University of Texas High-Resolution X-ray CT Facility for scanning by Katharine Criswell of The University of Chicago. Funding for scanning was provided by Katharine Criswell and Christopher Bell of The University of Texas. Funding for image processing was provided by UTCT.
About this Specimen
The specimen was scanned by Matt Colbert on 25 November 2009 along the coronal axis for a total of 916 slices. Each 1024x1024 pixel slice is 0.02683 mm thick, with an interslice spacing of 0.02683 mm and a field of reconstruction of 19 mm.
Criswell, K.E. 2015. The comparative osteology and phylogenetic relationships of African and South American lungfishes (Sarcopterygii: Dipnoi). Zoological Journal of the Linnean Society, 174, 801-858.
Protopterus dolloi page on the IUCN Red List of Threatened Species