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FIGURE 7. Sarotherodon lamprechti. A. ZSM 29929 in Two new sympatric Sarotherodon species (Pisces: Cichlidae) endemic to Lake Ejagham, Cameroon, west-central Africa, with comments on the Sarotherodon galilaeus species complex

FIGURE 7. Sarotherodon lamprechti. A. ZSM 29929, female, 98.61 mm SL (holotype). B ZSM 39718, male, 91.86 mm SL (paratype).

FIGURE 6 in Two new sympatric Sarotherodon species (Pisces: Cichlidae) endemic to Lake Ejagham, Cameroon, west-central Africa, with comments on the Sarotherodon galilaeus species complex

FIGURE 6. Sarotherodon knauerae in natural colouration A. Adult male. B. Adult female. D. Feeding female. E. Substrate feeding juvenile.

FIGURE 8 in Two new sympatric Sarotherodon species (Pisces: Cichlidae) endemic to Lake Ejagham, Cameroon, west-central Africa, with comments on the Sarotherodon galilaeus species complex

FIGURE 8. Lower pharyngeal jaw in ventral and dorsal view, A. Sarotherodon knauerae, B. Sarotherodon lamprechti. Upper pharyngeal jaw, left side in ventral view, C. Sarotherodon knauerae, D. Sarotherodon lamprechti, E. Sarotherodon galilaeus (Lower Niger). Abbreviations: Ep1–4, epibranchials 1–4, Pb2–3, pharyngobranchials 2–3, Pb3tp, toothplate of Pb3, UP4, fourth upper pharyngeal toothplate. Double headed arrows indicate width of Pb2. Pharyngeal bones scaled proportionately for comparison (A. vs. B.) and (C. vs. D. vs. E.).

FIGURE 9 in Two new sympatric Sarotherodon species (Pisces: Cichlidae) endemic to Lake Ejagham, Cameroon, west-central Africa, with comments on the Sarotherodon galilaeus species complex

FIGURE 9. Sarotherodon lamprechti in natural colouration. A. Male in full nuptial colouration, courting above crotch in shallow water. B. Breeding female. C. Courting in-shore pair (male left, female right). D. Female in nuptial colouration (background courting male). E. Male above sand pit in deeper water. F. Swarm of surface feeding juveniles.

FIGURE 1 in Two new sympatric Sarotherodon species (Pisces: Cichlidae) endemic to Lake Ejagham, Cameroon, west-central Africa, with comments on the Sarotherodon galilaeus species complex

FIGURE 1. Measurements as in Dunz & Schliewen (2010) are: Total Length (TL), Standard Length (SL), Body Depth (BD), Head Length (HL), Snout Length (SnL), Snout Width across Preorbital Process (POW not depicted), Cheek Depth (ChD), Eye Length (EyL), Dorsal Fin Length (DFL), Anal Fin Length (AFL), Length of last Dorsal Spine (DSL), Length of third Anal Spine (ASL), Pelvic Fin Length (PFL), Predorsal Distance (PDD), Upper Lip Length (ULL), Lower Jaw Length (LJL), Lower Lip Length (LLL), Lower Lip Width (LLW). Measurements sensu Barel et al. (1977) unless indicated otherwise are: Interorbital Width (IOW not depicted), Pectoral Fin Length (PecFL), Preorbital Distance (POD), Snout Width across Lachrymal (LaW not depicted), Caudal Peduncle Length (CPL; from rearmost point of insertion of last dorsal fin ray to centre of hypurals at flexion point), Caudal Peduncle Depth (CPD; vertical at flexion point of hypurals), Lower Jaw Width (LJW; between left and right lower jaw articulation with the suspensorium), Pelvic Spine Length (PSL; from insertion to distal tip), Preanal Distance (PAD; from anterior tip of lower lip at symphysis to rostal rim of anus), Distance lower jaw to Pelvic fins (PelD; anterior point as PAD to midpoint of pelvic girdle).

FIGURE 5 in Four new species of Cichlidogyrus (Monogenea, Ancyrocephalidae) from Sarotherodon mvogoi and Tylochromis sudanensis (Teleostei, Cichlidae) in Cameroon

FIGURE 5. Haptoral and genital hard parts of Cichlidogyrus djietoi n. sp.. Ap, accessory piece; DB, dorsal transverse bar; DA, dorsal anchor; He, heel; Pe, penis; VA, ventral anchor; VB, ventral transverse bar; Vg, vagina; I to VII, marginal hooks. Scale bar = 20 µm.

FIGURE 1 in Four new species of Cichlidogyrus (Monogenea, Ancyrocephalidae) from Sarotherodon mvogoi and Tylochromis sudanensis (Teleostei, Cichlidae) in Cameroon

FIGURE 1. Measurements used to study the new Cichlidogyrus species. DB, dorsal transverse bar: h, length of dorsal bar auricle; w, dorsal bar maximum width; x, dorsal bar total length; y, distance between auricles. A, anchor: a, anchor total length; b, anchor blade length; c, anchor shaft length; d, anchor guard length; e, anchor point length. Ap, accessory piece straight length; He, heel straight length; Pe, penis total curved length. M, marginal hook length. VB, ventral transverse bar: w, ventral bar maximum width; x, length of one ventral bar branch; Vg, vagina: x, vagina total length, w, vagina width.

FIGURE 2 in Four new species of Cichlidogyrus (Monogenea, Ancyrocephalidae) from Sarotherodon mvogoi and Tylochromis sudanensis (Teleostei, Cichlidae) in Cameroon

FIGURE 2. Haptoral and genital hard parts of Cichlidogyrus mvogoi n. sp.. Ap, accessory piece; DB, dorsal transverse bar; DA, dorsal anchor; He, heel; Pe, penis; VA, ventral anchor; VB, ventral transverse bar; Vg, vagina; I to VII, marginal hooks. Scale bar = 20 µm.

FIGURE 3 in Four new species of Cichlidogyrus (Monogenea, Ancyrocephalidae) from Sarotherodon mvogoi and Tylochromis sudanensis (Teleostei, Cichlidae) in Cameroon

FIGURE 3. Haptoral and genital hard parts of Cichlidogyrus sigmocirrus n. sp.. Ap, accessory piece; DB, dorsal transverse bar; DA, dorsal anchor; He, heel; Pe, penis; VA, ventral anchor; VB, ventral transverse bar; I to VII, marginal hooks. Scale bar = 20 µm.

FIGURE 4 in Four new species of Cichlidogyrus (Monogenea, Ancyrocephalidae) from Sarotherodon mvogoi and Tylochromis sudanensis (Teleostei, Cichlidae) in Cameroon

FIGURE 4. Haptoral and genital hard parts of Cichlidogyrus chrysopiformis n. sp.. Ap, accessory piece; DB, dorsal transverse bar; DA, dorsal anchor; He, heel; Pe, penis; VA, ventral anchor; VB, ventral transverse bar; Vg, vagina; I to VII, marginal hooks. Scale bar = 20 µm.

F in Revision and biogeographical analysis of the black-chinned tilapia Sarotherodon melanotheron (Teleostei, Cichlidae): results of morphometric, allozyme, globin chain and mtDNA studies

F. 6. Neighbour-joining cladogram of the different mtDNA haplotypes identified in S. melanotheron, including cytochrome b sequences of six outgroup species: Oreochromis niloticus, Onil; O. tanganicae, Otan; O. malagarasi, Omal; O. mossambicus, Omos; O. aureus, Oau; Sarotherodon galilaeus, Sgal. Genetic distances were calculated following Kimura's (1980) two-parameter model. For abbreviations of haplotypes see table 1.

F in Revision and biogeographical analysis of the black-chinned tilapia Sarotherodon melanotheron (Teleostei, Cichlidae): results of morphometric, allozyme, globin chain and mtDNA studies

F. 7. Historical biogeographic scenario proposed for S. melanotheron/S. nigripinnis. Main migration routes/expansions from the centre of origin (Congo-Brazzaville/Gabon) are indicated by arrows. The systematic revision of the subspecies complex as proposed in this study is also indicated. The concrete species border between S. melanotheron and S. nigripinnis presently remains unknown.

F in Revision and biogeographical analysis of the black-chinned tilapia Sarotherodon melanotheron (Teleostei, Cichlidae): results of morphometric, allozyme, globin chain and mtDNA studies

F. 5. Unrooted neighbour-joining phylogeny of the 26 different mtDNA haplotypes identified within the sequenced part of the cytochrome b gene (307 bp). Genetic distances were calculated using Kimura's (1980) two-parameter model. The numbers at each node indicate percentage recovery of the particular node (1000 replicates). For abbreviations of haplotypes see table 1.

F in Revision and biogeographical analysis of the black-chinned tilapia Sarotherodon melanotheron (Teleostei, Cichlidae): results of morphometric, allozyme, globin chain and mtDNA studies

F. 2. Plot of factor 1 taken from a PCA on six meristic counts and factor 3 taken from a PCA on 18 log-transformed measurements of 187 specimens. Populations from 'natural' environments are illustrated.

F in Revision and biogeographical analysis of the black-chinned tilapia Sarotherodon melanotheron (Teleostei, Cichlidae): results of morphometric, allozyme, globin chain and mtDNA studies

F. 1. Geographic origin of the S. melanotheron samples examined. The numbering of the sampling localities corresponds to the listing of populations as indicated in table 1.

F in Revision and biogeographical analysis of the black-chinned tilapia Sarotherodon melanotheron (Teleostei, Cichlidae): results of morphometric, allozyme, globin chain and mtDNA studies

F. 4. Genetic relationships between the populations of S. melanotheron examined, based on allozyme data and globin chain characteristics. Unrooted bootstrap 50% majority rule consensus tree. The branch lengths correspond to the number of character changes along the branches. Numbers indicate the percentage obtained using bootstrapping (1000 replicates). For abbreviations of populations see table 1.

FIG. 5 in Morphometric and allozyme variation in the black-chinned tilapia Sarotherodon melanotheron (Perciformes, Cichlidae), with a revision of the subspecies complex

FIG. 5. The aberrant pattern of the lateral line in S. melanotheron specimens from Niayes, Senegal (above) compared to the normal pattern of specimens from all other populations studied (below).

FIG. 4 in Morphometric and allozyme variation in the black-chinned tilapia Sarotherodon melanotheron (Perciformes, Cichlidae), with a revision of the subspecies complex

FIG. 4. Plot of a principal component analysis using 22 log-transformed measurements taken on 155 specimens of Sarotherodon melanotheron. (a) Only the Niayes (Senegal) and the St. Louis (Senegal) 1 Murry Town (Sierra Leone) populations are illustrated. (b) Only the Keta (Ghana) 1 Lome (Togo) and the Ayame (Ivory Coast) populations are illustrated.

FIG. 3 in Morphometric and allozyme variation in the black-chinned tilapia Sarotherodon melanotheron (Perciformes, Cichlidae), with a revision of the subspecies complex

FIG. 3. Plot of a principal component analysis using 22 log-transformed measurements taken on 155 specimens of S. melanotheron. Only populations from`natural' environments are illustrated.

FIG. 2 in Morphometric and allozyme variation in the black-chinned tilapia Sarotherodon melanotheron (Perciformes, Cichlidae), with a revision of the subspecies complex

FIG. 2. Measurements taken on S. melanotheron specimens (modi®ed from Teugels and Hanssens, 1995). 1. Total pharyngeal bone width; 2. Toothed pharyngeal bone width; 3. Pharyngeal bone length; 4. Standard length; 5. Head length; 6. Snout length; 7. Eye diameter; 8. Interorbital distance (not illustrated); 9. Preorbital bone length; 10. Body depth; 11. Caudal peduncle depth; 12. Caudal peduncle length; 13. Predorsal distance; 14. Prepectoral distance; 15. Prepelvic distance; 16. Preanal distance; 17. Dorsal ®n length; 18. Dorsal ®n heigth; 19. Pectoral ®n length; 20. Pelvic ®n length; 21. Anal ®n length; 22. Anal ®n height.