Aphyosemion campomaanense

description

Description. See Figs. 4 – 10 for general appearance of A. campomaanense, Table 2 for morphometric data of holotype and paratypes. Body and fin morphology. There is little sexual dimorphism in body form and allometry in body growth (visually checked on the data matrix) in A. campomaanense. The dorsal-fin deviation to anal fin (D / A) is the same in male and female: towards the rear, closer to the end of the anal (usually D / A = 6 – 7). Dorsal and anal fin shapes in the male and female differ only by the male fins being wide and triangular while the female fins are rounded. In contrast, caudal fin sexual dimorphism is strong with a lyre shape with extended filaments in the male and a round shape in the female. Meristic characters. Measurement data are summarized in Table 2, (D = 10.73, A = 14, D / A = 6.84). These are not diagnostic and are within the average values reported for other species of the A. calliurum species (Huber, 2000). Coloration of live males. The dorsal surface is light brown. The head, laterally pigmented with light blue has three oblique red bars on the operculum, a sub-ocular red line and anterior and posterior infrabuccal red bands. The flanks vary from light

Genetic characterization of the Aphyosemion calliurum species group and description of a new species from this assemblage: A. campomaanense (Cyprinodontiformes: Aplocheiloidei: Nothobranchiidae) from Southern Cameroon

description

Ecology. Like most of the A. calliurum species group, A. campomaanense is usually found in small streams and shallow pools in the rainforest. They usually stay close to the banks, avoiding the deepest and fastest water. Among killifish, A. campomaanense is sympatric with Aphyosemion (Chromaphyosemion) lugens Amiet, 1991, Epiplatys infrafasciatus (Günther, 1866) and Procatopus nototaenia Boulenger, 1904.

Genetic characterization of the Aphyosemion calliurum species group and description of a new species from this assemblage: A. campomaanense (Cyprinodontiformes: Aplocheiloidei: Nothobranchiidae) from Southern Cameroon

diagnosis

Diagnosis. Aphyosemion campomaanense is distinguished from congeners by a combination of coloration characteristics. The new species is distinguished from A. ahli (Fig. 11) by a much more pronounced and darker blue background color than any A. ahli population (Fig. 64 & 65, Pl. 50) in Amiet (1987). The background color is here defined as the color that covers the majority of the body. In addition, A. ahli has a caudal fin with symmetric coloration while in A. campomaanense the caudal fin coloration is asymmetrical with a yellow lower margin and a white upper margin (vs. red and yellow margins in A. ahli). Although such asymmetric caudal fin coloration is occasionally observed in A. ahli (the upper margin sometimes being reduced to only the red part), the red and yellow lower margin is always present. In A. campomaanense, this margin is only yellow. Finally, the pectoral fins in A. campomaanense are deep orange vs. pale yellow in A. ahli. Aphyosemion campomaanense is distinguished from A. lividum, Fig. 12, by striped dorsal and anal fins vs. unstriped fins; and red dots aligned like vertical stripes posteriorly versus no red punctuation posteriorly. The new species is distinguished

Genetic characterization of the Aphyosemion calliurum species group and description of a new species from this assemblage: A. campomaanense (Cyprinodontiformes: Aplocheiloidei: Nothobranchiidae) from Southern Cameroon

distribution

Distribution and vaiability. The complete distribution of A. campomaanense is not well known because a large zone north of the Campo-Ma’an National Park still has not been sampled, mainly because no road or even track exists. A. campomaanense has been found in 7 locations, 5 of them inside the Campo-Ma’an National Park where it occupies the western part up to point ABC O 6 / 86 (2.33735 ° N, 10.20435 ° E). To the east and north, the species is replaced by A. cameronense (Boulenger, 1903). The species is also present in the vicinity of Nkoelon (ABC 05 / 55, 2.37042 ° N, 9.95850 ° E), a few kilometers west of the park and also a few kilometers northward (ABK 07 / 183, 2.43089 ° N, 10.11654 ° E) outside of the park. Up to now, this species has not been collected south of the Ntem River in Equatorial Guinea, but its presence there cannot be ruled out. Unlike A. ahli (Fig. 11) or A. edeanum, which show significant inter-population morphological variability (Amiet, 1987), A. campomaanense populations vary only in regard to some minor differences in anal and caudal fin coloration. For example, males from the population ABC 06 / 83 (site 18, Fig. 1) exhibit no yellow band in the anal fin (

Genetic characterization of the Aphyosemion calliurum species group and description of a new species from this assemblage: A. campomaanense (Cyprinodontiformes: Aplocheiloidei: Nothobranchiidae) from Southern Cameroon