Two New Species of Suckermouth Catfishes (Mochokidae: Chiloglanis) from Upper Guinean Forest Streams in West Africa

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31 July 2023 Two New Species of Suckermouth Catfishes (Mochokidae: Chiloglanis) from Upper Guinean Forest Streams in West Africa

Ray C. Schmidt, Pedro H. N. Bragança, John P. Friel, Frank Pezold, Denis Tweddle, Henry L. Bart Jr.

Author Affiliations +

Ray C. Schmidt,^1,2,* Pedro H. N. Bragança,^3,4 John P. Friel,⁵ Frank Pezold,^6,7 Denis Tweddle,³ Henry L. Bart Jr.⁸

¹Biology Department, Randolph-Macon College, Ashland, Virginia 23005; Email: rayschmidt@rmc.edu.
²Smithsonian Research Associate, National Museum of Natural History, Division of Fishes, Washington, DC 20560.
³NRF-South African Institute of Aquatic Biodiversity, Makhanda (Grahamstown) 6140, South Africa.
⁴Universidade Federal do Maranhão, Programa de Pós-Graduação em Biodiversidade e Conservação, Av. dos Portugueses 1966, Cidade Universitária do Bacanga, CEP 65080-805, São Luís, MA, Brazil.
⁵Alabama Museum of Natural History, The University of Alabama, Tuscaloosa, Alabama 35487-0340.
⁶Department of Life Sciences, Texas A&M University–Corpus Christi, Corpus Christi, Texas 78412-5800.
⁷Florida Museum of Natural History, University of Florida, Gainesville, Florida 32611-7800.
⁸Department of Ecology and Evolutionary Biology, Tulane University, New Orleans, Louisiana 70118.

^*Send correspondence to this address.

Ichthyology & Herpetology, 111(3):376-389 (2023). https://doi.org/10.1643/i2022067

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Fig. 1

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Localities of species of Chiloglanis discussed in this study. Rivers of the Upper Guinean Forests enlarged from outlined region in the inset map of West and Central Africa. River drainages outlined in white lines. White circles are localities where no Chiloglanis were collected. Locations of Chiloglanis frodobagginsi (black circles), holotype of C. frodobagginsi (black star), type locality of Chiloglanis fortuitus (black triangle), and comparative Chiloglanis micropogon and Chiloglanis cf. micropogon (black squares).

Fig. 2

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Plots of PC1 to PC2 (A) and PC2 to PC3 (B) from principal component analysis of 45 log-transformed measurements from 114 specimens of the short-spine taxa from the Upper Guinean Forests. Holotype of Chiloglanis fortuitus denoted by star.

Fig. 3

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Plots of PC1 to PC2 from principal component analysis of 35 log-transformed measurements from 47 specimens (A) and PC2 to PC3 (B). The holotype of Chiloglanis frodobagginsi is noted by the black star. Refer to Supplemental Table B (see Data Accessibility) for component loading values.

Fig. 4

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Reduced-major axis regression of distance from dorsal fin to adipose fin (as a percentage of standard length) on log-transformed standard length (A). Reduced-major axis regression of log-transformed total number of premaxillary teeth on log-transformed standard length (B). Chiloglanis frodobagginsi (open circle), Chiloglanis frodobagginsi from the Moa River (filled circle), Chiloglanis micropogon (open square), and holotype of C. frodobagginsi (black star).

Fig. 5

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Dorsal, lateral, and ventral views of the holotype of Chiloglanis fortuitus, SAIAB 202292, 35.0 mm SL, Liberia, St. John River drainage, Nimba County, Dayea River, above Yekepa, 7.579333°N, 8.516889°W. Scale bar equals 2 mm. Photographs by P. H. N. Bragança.

Table 1

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Morphometric measurements and meristics for holotype of Chiloglanis fortuitus. Standard length expressed in mm. All other measurements expressed in percent SL.

Fig. 6

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Dorsal, lateral, and ventral views of Chiloglanis frodobagginsi holotype, TU 203552, 24.1 mm SL, Guinea, Niger River drainage, Niger River, North of Faranah, on road N29, 10.28382°N, 10.76925°W. Scale bar equals 2 mm. Photographs by S. Raredon.

Table 2

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Morphometric measurements and meristics for Chiloglanis frodobagginsi (n = 22; holotype and 21 paratypes) and topotypic Chiloglanis micropogon (n = 10). Standard length expressed in mm. All other measurements expressed in percent SL. Meristic data for holotype are identified by an asterisk (*).

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Ichthyology & Herpetology
Vol. 111 • No. 3
September 2023

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Ray C. Schmidt, Pedro H. N. Bragança, John P. Friel, Frank Pezold, Denis Tweddle, Henry L. Bart Jr. "Two New Species of Suckermouth Catfishes (Mochokidae: Chiloglanis) from Upper Guinean Forest Streams in West Africa," Ichthyology & Herpetology, 111(3), 376-389, (31 July 2023)

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