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Lavoué S, Sullivan JP. Petrocephalus boboto and Petrocephalus arnegardi, two new species of African electric fish (Osteoglossomorpha, Mormyridae) from the Congo River basin. Zookeys. 2014;(400):43-65doi: 10.3897/zookeys.400.6743.
Lavoué, S., & Sullivan, J. P. (2014). Petrocephalus boboto and Petrocephalus arnegardi, two new species of African electric fish (Osteoglossomorpha, Mormyridae) from the Congo River basin. ZooKeys, (400), 43-65. https://doi.org/10.3897/zookeys.400.6743
Lavoué, Sébastien, and Sullivan, John P. "Petrocephalus boboto and Petrocephalus arnegardi, two new species of African electric fish (Osteoglossomorpha, Mormyridae) from the Congo River basin." ZooKeys vol. ,400 (2014): 43-65. doi: https://doi.org/10.3897/zookeys.400.6743
Lavoué S, Sullivan JP. Petrocephalus boboto and Petrocephalus arnegardi, two new species of African electric fish (Osteoglossomorpha, Mormyridae) from the Congo River basin. Zookeys. 2014 Apr 10;(400):43-65. doi: 10.3897/zookeys.400.6743. eCollection 2014. PMID: 24843255; PMCID: PMC4023242.
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Zookeys. 2014 Apr 10;(400):43-65. doi: 10.3897/zookeys.400.6743. eCollection 2014.

Petrocephalus boboto and Petrocephalus arnegardi, two new species of African electric fish (Osteoglossomorpha, Mormyridae) from the Congo River basin.

ZooKeys

Sébastien Lavoué, John P Sullivan

Affiliations

  1. Institute of Oceanography, National Taiwan University, Roosevelt Road, Taipei 10617, Taiwan.
  2. Cornell University Museum of Vertebrates, 159 Sapsucker Woods Road, Ithaca, New York 14850 USA.

PMID: 24843255 PMCID: PMC4023242 DOI: 10.3897/zookeys.400.6743

Abstract

A specimen of the African weakly electric fish genus Petrocephalus (Osteoglossomorpha, Mormyridae) collected in the Congo River at Yangambi, Orientale Province, Democratic Republic of Congo, is described as a new species. Petrocephalus boboto sp. n. can be distinguished from other Central African species of Petrocephalus by a combination of the following characteristics: three distinct black spots on the body, one at the origin of the pectoral fin, one at the origin of the caudal fin and one below the anterior base of the dorsal fin; Nakenrosette and Khelrosette electroreceptor clusters distinct on head but Augenrosette cluster reduced in size; 23 branched dorsal rays, 34 branched anal rays, and electric organ discharge waveform triphasic. Petrocephalus boboto sp. n. most closely resembles the holotype of Petrocephalus binotatus but is easily distinguished from it by its smaller mouth. A comparative molecular analysis including 21 other Petrocephalus species shows Petrocephalus boboto sp. n. to be genetically distinctive and to represent a deep lineage in the genus. Two specimens of Petrocephalus collected at Yangambi are morphologically similar and genetically closely related to specimens previously assigned to Petrocephalus binotatus, collected in the northwestern Congo River basin within Odzala-Kokua National Park, Republic of the Congo. This prompts us to formally describe a new species from these collections, Petrocephalus arnegardi sp. n., that, although similar to the holotype of Petrocephalus binotatus, can be distinguished from it by its smaller mouth and shorter interorbital width.

Keywords: Biodiversity; Petrocephalinae; cytochrome b; electric organ discharge; integrative taxonomy; phylogeny; weakly electric fish

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