Description of two deep-water fishes of the genus Diplotaxodon (Teleostei: Cichlidae) from Lake Malaŵi, Africa

Jay Richard Stauffer, Jr., Titus B. Phiri, Adrianus F. Konings

Research output: Contribution to journalArticle

Abstract

Two species of haplochromine cichlid fishes of the genus Diplotaxodon Trewavas, endemic to Lake Malaŵi are described: Diplotaxodon longimaxilla, new species, and Diplotaxodon altus, new species. Diplotaxodon altus is diagnosed from other species in the genus based on body depth (35.1-37.8% SL), number of gill rakers (21-26), and a smaller cheek depth (18.2-20.0% HL). Diplotaxodon longimaxilla is delimited from other Diplotaxodon spp. based on body depth (28.9-32.4% SL), horizontal eye diameter (HED 27.1-32.1% HL), smaller cheek depth (15.2-19.4% HL), and number of lateral-line scales (35-38). Other authors have indicated that several other Diplotaxodon spp. occur, but too few specimens were available to permit detailed comparisons. The two new species occur sympatrically at depths of between 40-130 m. Specimens of Diplotaxodon altus were sampled from nets deployed at night using light attraction, while specimens of D. longimaxilla were sampled from nets operated both at night and day. We further examined the three co-types of Diplotaxodon argenteus, the type species of the genus, and designated a lectotype.

Original languageEnglish (US)
Pages (from-to)90-100
Number of pages11
JournalProceedings of the Biological Society of Washington
Volume131
Issue number1
DOIs
StatePublished - Jan 1 2018

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Cichlids
Cichlidae
Cheek
Lakes
Fishes
lakes
Water
fish
water
new species
Light
gills
eyes

All Science Journal Classification (ASJC) codes

  • Agricultural and Biological Sciences(all)

Cite this

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title = "Description of two deep-water fishes of the genus Diplotaxodon (Teleostei: Cichlidae) from Lake Malaŵi, Africa",
abstract = "Two species of haplochromine cichlid fishes of the genus Diplotaxodon Trewavas, endemic to Lake Malaŵi are described: Diplotaxodon longimaxilla, new species, and Diplotaxodon altus, new species. Diplotaxodon altus is diagnosed from other species in the genus based on body depth (35.1-37.8{\%} SL), number of gill rakers (21-26), and a smaller cheek depth (18.2-20.0{\%} HL). Diplotaxodon longimaxilla is delimited from other Diplotaxodon spp. based on body depth (28.9-32.4{\%} SL), horizontal eye diameter (HED 27.1-32.1{\%} HL), smaller cheek depth (15.2-19.4{\%} HL), and number of lateral-line scales (35-38). Other authors have indicated that several other Diplotaxodon spp. occur, but too few specimens were available to permit detailed comparisons. The two new species occur sympatrically at depths of between 40-130 m. Specimens of Diplotaxodon altus were sampled from nets deployed at night using light attraction, while specimens of D. longimaxilla were sampled from nets operated both at night and day. We further examined the three co-types of Diplotaxodon argenteus, the type species of the genus, and designated a lectotype.",
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Description of two deep-water fishes of the genus Diplotaxodon (Teleostei : Cichlidae) from Lake Malaŵi, Africa. / Stauffer, Jr., Jay Richard; Phiri, Titus B.; Konings, Adrianus F.

In: Proceedings of the Biological Society of Washington, Vol. 131, No. 1, 01.01.2018, p. 90-100.

Research output: Contribution to journalArticle

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