. Bonn zoological bulletin. Zoology. Aphyosemion pseitdoelegans from the Congo Basin 7. Fig. 3. Dorsal fin of male specimens preserved in ethanol. In these specimens the red pigmentation is lost, but the difference in colour pattern between the two species is still visible. A) A. pseitdoelegans, MRAC 80709-80777, Bokuma, with plain greyish to brownish fin tissue. B) A. elegans, MRAC 93724, Bokuma, fin tissue with light dots which are the remains of the former red pig- mentation. Aphyosemion congicum has only a few red dots on the flanks and an almost dotless anal fin versus many red dots or ba
. Bonn zoological bulletin. Zoology. Aphyosemion pseitdoelegans from the Congo Basin 7. Fig. 3. Dorsal fin of male specimens preserved in ethanol. In these specimens the red pigmentation is lost, but the difference in colour pattern between the two species is still visible. A) A. pseitdoelegans, MRAC 80709-80777, Bokuma, with plain greyish to brownish fin tissue. B) A. elegans, MRAC 93724, Bokuma, fin tissue with light dots which are the remains of the former red pig- mentation. Aphyosemion congicum has only a few red dots on the flanks and an almost dotless anal fin versus many red dots or bars on flanks, anal fin with many red dots or inter ra- dial red stripes. Besides the dark dorsal fin, the body colour pattern re- sembles that of A. elegans, but A. pseitdoelegans has an asymmetric colour pattern in the caudal fin versus a sym- metric pattern in A. elegans. In general, A. pseitdoelegans is more intensely pigmented then A. elegans, often hav- ing larger and more red dots on the flanks and a denser red pigmentation of the head. Aphyosemion elegans al- ways shows two or more small isolated rounded red dots underneath the eye, whereas in most A. pseudoelegans these dots are larger and irregular and often fused, form- ing a red streak. In very heavily pigmented A. pseudoel- egans, the red dots in the caudal fin may form vertical bars; this is never the case in A. elegans. Both species may show narrow vertical dark red bars on the flanks, but in A. elegans these bars may run all over the flanks, whereas in A. pseudoelegans these bars in most cases only cover the ventral part of the flanks, and dor- sally frequently with nearly regular rows of red dots. Description. See Figures 2-3 for general appearance and colour pattern, Table 1 for morphometric, and Table 2 for meristic data of the type series. Aphyosemion pseudoele- gans is a slender, elongate species. It shows strong sexu- al dimorphism, males more colourful, unpaired fins larg- er and with fin extensions. Relat
Size: 2013px × 1241px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcollectionbiodiversity, bookcontributors, booksubjectzoology
