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Fig. 3 in Congochromis, a New Cichlid Genus (Teleostei: Cichlidae) from Central Africa, with the Description of a New Species from the Upper Congo River, Democratic Republic of Congo

Fig. 3. Head squamation of Congochromis pugnatus (paratype, AMNH 237670); gray area on cheek indicates region of expanded adductor mandibulae musculature.

Fig. 4 in Congochromis, a New Cichlid Genus (Teleostei: Cichlidae) from Central Africa, with the Description of a New Species from the Upper Congo River, Democratic Republic of Congo

Fig. 4. Congochromis pugnatus: (A) AMNH 6079, holotype, male, 48.2 mm SL, Democratic Republic of Congo, Kisangani (Stanleyville), May 1915, H. Lang and J.P. Chapin; (B) AMNH 237670, paratype, female, 37.0 mm SL, same data as holotype.

Fig. 6 in Congochromis, a New Cichlid Genus (Teleostei: Cichlidae) from Central Africa, with the Description of a New Species from the Upper Congo River, Democratic Republic of Congo

Fig. 6. (A) Congochromis squamiceps, IRSNB 13, syntype, male, 47.5 mm SL, Lindi River, Upper Congo, (B) C. dimidiatus, MNHN 1892-0120, syntype, male, 44.5 mm SL, Bangui, (C) C. sabinae, AMNH 235651, paratype, male, 48.0 mm SL, Loubi River, southwest of Makoua.

Fig. 7 in Congochromis, a New Cichlid Genus (Teleostei: Cichlidae) from Central Africa, with the Description of a New Species from the Upper Congo River, Democratic Republic of Congo

Fig. 7. Scatterplot of sheared second and third PC scores of 16 log-transformed morphometric variables the type series of Congochromis pugnatus (stars), syntype of C. squamiceps (square), paratypes of C. sabinae (hexagons), and syntypes of C. dimidiatus (circles) (see table 2 for axis loadings).

Fig. 5. Congochromis pugnatus, AMNH 237670 in Congochromis, a New Cichlid Genus (Teleostei: Cichlidae) from Central Africa, with the Description of a New Species from the Upper Congo River, Democratic Republic of Congo

Fig. 5. Congochromis pugnatus, AMNH 237670, paratype, male, 51.5 mm SL: (A) infraorbital series, (B) suspensorium and jaws, (C) 1st gill arch, and (D) lower pharyngeal jaw.

Fig. 1 in Congochromis, a New Cichlid Genus (Teleostei: Cichlidae) from Central Africa, with the Description of a New Species from the Upper Congo River, Democratic Republic of Congo

Fig. 1. Isolated infraorbital series, oral jaws, and suspensoria of (A) Congochromis dimidiatus, AMNH

Fig. 2 in Congochromis, a New Cichlid Genus (Teleostei: Cichlidae) from Central Africa, with the Description of a New Species from the Upper Congo River, Democratic Republic of Congo

Fig. 2. Caudal fin skeleton of (A) Parananochromis gabonicus (CU 80730), (B) Nanochromis parilus (MCZ 50202), (C) Congochromis pugnatus (AMNH 237670), (D) C. squamiceps (recorded from a radiograph of IRSNB 13), (E) C. sabinae (recorded from radiographs of AMNH 235651-2), and (F) C. dimidiatus (AMNH 8150).

FIGURE 7 in Congochromis rotundiceps sp. nov., a new cichlid species (Actinopterygii: Cichlidae) from the Congo Drainage

FIGURE 7. Congochromis rotundiceps sp. nov paratype, preserved. A. Paratype (MRAC 192233) Male. B. Radiograph of the same specimen.

FIGURE 4 in Congochromis rotundiceps sp. nov., a new cichlid species (Actinopterygii: Cichlidae) from the Congo Drainage

FIGURE 4. Plot of the fourth meristic PCA results (PC I vs PC II) including only Congochromis specimens (N=87). PCI explains 14.11% and PC II explains 11.68% of the variance in the meristic dataset with 30 meristic values.

FIGURE 2 in Congochromis rotundiceps sp. nov., a new cichlid species (Actinopterygii: Cichlidae) from the Congo Drainage

FIGURE 2. Plot of second meristic PCA results (PC I vs. PC II) including all investigated specimens of all chromidotilapiine genera except for the aberrant genus Teleogramma (N=310). PCI explains 22.19% and PC II explains 10.56% of the variance in the meristic dataset with 40 meristic values.

FIGURE 8 in Congochromis rotundiceps sp. nov., a new cichlid species (Actinopterygii: Cichlidae) from the Congo Drainage

FIGURE 8. Pharyngeal jaw and dentition of Congochromis rotundiceps sp. nov. A. Lower pharyngeal bone (MRAC 192224- 232 #7), specimen with 50.3mm SL. B. Overview of arrangement and morphology of oral jaw teeth, specimen with 49.7mm SL (MRAC 192224-232 #4).

FIGURE 3b in Congochromis rotundiceps sp. nov., a new cichlid species (Actinopterygii: Cichlidae) from the Congo Drainage

FIGURE 3b. Plot of the third meristic PCA results (PC I vs. PC III) including only specimens (N=170) belonging to those five genera that overlapped in the second PCA plots of PC I, PC II and PC III (see Fig. 2 and Fig. 3a), i.e. Parananochromis, Nanochromis, Pelvicachromis, Enigmatochromis and Congochromis including C. rotundiceps sp. nov. Species of the five genera overlapping with Congochromis are separately labelled. PC I explains 16.28% and PC III explains 8.40% of the variance in the meristic dataset with 38 meristic values. Species of the five genera overlapping with Congochromis are separately labelled.

FIGURE 3a in Congochromis rotundiceps sp. nov., a new cichlid species (Actinopterygii: Cichlidae) from the Congo Drainage

FIGURE 3a. Plot of the third meristic PCA results (PC I vs. PC II) including only specimens (N=170) belonging to those five genera that overlapped in the second PCA plots of PC I, PC II and PC III (see Fig. 2), i.e. Parananochromis, Nanochromis, Pelvicachromis, Enigmatochromis and Congochromis including C. rotundiceps sp. nov. Species of the five genera overlapping with Congochromis are separately labelled. PC I explains 16.28% and PC III explains 13.17% of the variance in the meristic dataset with 38 meristic values. Species of the five genera overlapping with Congochromis are separately labelled.

FIGURE 1 in Congochromis rotundiceps sp. nov., a new cichlid species (Actinopterygii: Cichlidae) from the Congo Drainage

FIGURE 1. Plot of first meristic PCA results (PC I vs. PC II) including all investigated specimens of all chromidotilapiine genera including the aberrant genus Teleogramma (N=326). Chromidotilapia grouping is based on Schwarzer et al. (2015) groups "Chromidotilapia I", "Chromidotilapia II" and "Chromidotilapia III". PCI explains 28.11% and PC II explains 12.83% of the variance in the meristic dataset with 40 meristic values.

FIGURE 6 in Congochromis rotundiceps sp. nov., a new cichlid species (Actinopterygii: Cichlidae) from the Congo Drainage

FIGURE 6. Congochromis rotundiceps sp. nov. holotype, preserved. A. Holotype (MRAC 192224-232 #1) Female. B. Radiograph of holotype. C. Drawing of paratype by Ruth Kühbandner (MRAC 192224-232 #5 (42.13mm SL)).

FIGURE 5 in Congochromis rotundiceps sp. nov., a new cichlid species (Actinopterygii: Cichlidae) from the Congo Drainage

FIGURE 5. Plot of the morphometric PCA result (PC II vs. PC III) including only Congochromis specimens (N=87). PCII explains 12.42% and PC III explains 9.13% of the variance in the morphometric dataset with 24 distance measurements.