Fig 4 - uploaded by Ray C. Schmidt
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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).
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... sense of how the allometric trajectory of some of these traits differ in C. frodobagginsi, new species, and C. micropogon (Supplemental Fig. A; see Data Accessibility). The distance between the dorsal fin and adipose fin as a percentage of standard length has equal slopes (P ¼ 0.164), but they have significantly different elevations (P ¼ 0.0036; Fig. 4A). The number of premaxillary teeth plotted against log-transformed standard length for each species also clearly shows that these two species are distinct (Fig. 4B). Chiloglanis fortuitus, Schmidt, Bragança, and Tweddle, new species urn:lsid:zoobank.org:act:5DAB9826-ADEE-42B5-84A8-934D5CCF4511 Figure 5, Table 1 Holotype.-SAIAB 202292, ...
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... The distance between the dorsal fin and adipose fin as a percentage of standard length has equal slopes (P ¼ 0.164), but they have significantly different elevations (P ¼ 0.0036; Fig. 4A). The number of premaxillary teeth plotted against log-transformed standard length for each species also clearly shows that these two species are distinct (Fig. 4B). Chiloglanis fortuitus, Schmidt, Bragança, and Tweddle, new species urn:lsid:zoobank.org:act:5DAB9826-ADEE-42B5-84A8-934D5CCF4511 Figure 5, Table 1 Holotype.-SAIAB 202292, 35.0 mm SL, Liberia, St. John River drainage, Nimba County, Dayea River, above Yekepa, 7.5793338N, 8.5168898W, D. Tweddle, 30 March ...
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... (*). (10) tal Fig. A; see Data Accessibility), longer maxillary barbels (3.8-7.2 versus 3.4-6.5 % SL; Supplemental Fig. A; see Data Accessibility), a narrower mandibular tooth row (1.6-2.8 versus 2.4-3.1 % SL; Supplemental Fig. A; see Data Accessibility), a longer distance between dorsal fin and adipose fin (14.4-21.5 versus 14.9-18.8 % SL; Fig. 4A), and a shorter anal-fin base length (8.0-10.8 versus 9.7-12.7 % SL; Supplemental Fig. A; see Data Accessibility). Chiloglanis frodobagginsi is further distinguished from C. micropogon in having fewer premaxillary teeth (36-70 versus 62-103) scattered in three rows versus four ( Fig. 4B; Table 2). While the ranges of these measurements ...
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... dorsal fin and adipose fin (14.4-21.5 versus 14.9-18.8 % SL; Fig. 4A), and a shorter anal-fin base length (8.0-10.8 versus 9.7-12.7 % SL; Supplemental Fig. A; see Data Accessibility). Chiloglanis frodobagginsi is further distinguished from C. micropogon in having fewer premaxillary teeth (36-70 versus 62-103) scattered in three rows versus four ( Fig. 4B; Table 2). While the ranges of these measurements and counts overlap, these distinctions hold true when comparing similar sized species ( Fig. 4; Supplemental Fig. A; see Data Accessibility). Compared to Chiloglanis cf. micropogon from the Benue, Ndian, and Cross River basins Chiloglanis frodobagginsi has a narrower occipital shield ...
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... Fig. A; see Data Accessibility). Chiloglanis frodobagginsi is further distinguished from C. micropogon in having fewer premaxillary teeth (36-70 versus 62-103) scattered in three rows versus four ( Fig. 4B; Table 2). While the ranges of these measurements and counts overlap, these distinctions hold true when comparing similar sized species ( Fig. 4; Supplemental Fig. A; see Data Accessibility). Compared to Chiloglanis cf. micropogon from the Benue, Ndian, and Cross River basins Chiloglanis frodobagginsi has a narrower occipital shield (3.0-4.0 versus 4.0-5.4 % SL), a shorter dorsal fin to adipose fin distance (14.5-21.5 versus 19.3-24.2), and a narrower mandibular tooth row (1.6-2.8 versus 1.8-3.2 % ...
Citations
... Delimitation of species boundaries in rheophilic taxa using only morphological traits has previously presented challenges due to their superficially similar morphology, which is shaped by exposure to similar environmental drivers (Seegers 2008). However, integrative taxonomy as well as recent collections in under-sampled areas within the African continent have changed the previous perception that rheophilic habitats were depauperate (Schmidt et al. 2015(Schmidt et al. , 2016(Schmidt et al. , 2017(Schmidt et al. , 2023; Thomson et al. the name C. neumanni has persisted in subsequent literature from southern Africa, ichthyologists have consistently made remarks that the suckermouth catfishes of this region required detailed taxonomic investigation to determine their identity (Marshall 2011). In recent years, there has been general consensus among southern African ichthyologists that the species currently referred to as C. neumanni in this region actually represents an undescribed species or even a species complex, including several undescribed species. ...
The recent surge in the discovery of hidden diversity within rheophilic taxa, particularly in West and East Africa, prompted a closer examination of the extent to which the current taxonomy may obscure the diversity of riffle-dwelling suckermouth catfishes in the genus Chiloglanis in southern Africa. Currently, the region comprises eight valid species within this genus. Seven of them have relatively narrow geographic distribution ranges except for C. neumanni, which is considered to be widely distributed, occurring from the Buzi River system in the south, and its northern limit being the eastward draining river systems in Tanzania. Recent surveys of the middle Zambezi River system revealed Chiloglanis specimens that were distinguishable from the known species of the genus from southern Africa. Integration of molecular and morphological data indicated that these specimens from the Mukwadzi River represent a new species to science, herein described as Chiloglanis carnatus Mutizwa, Bragança & Chakona, sp. nov. This species is readily distinguished from its southern African congeners by the possession of a distinctive extended dermal tissue covering the base of the dorsal fin and the possession of ten mandibular teeth (vs 8, 12, or 14 in the other taxa). Results from this study add to the growing evidence of a high level of undocumented diversity within riffle-dwelling taxa in southern Africa.
