ABC_05-19
ABC 05-19
Dibeng
Dibeng
Aphyosemion riggenbachi 'Henda River'
Henda River

Aphyosemion riggenbachi 'Henda River'
Kopongo
Kopongo
Ndokama
C_89-18
Ndokama

Aphyosemion riggenbachi 'Ndokama'
Ndokndak
ADL_13-49 -
Ndokndak
Poutloloma
ADGP_11-22 -
CI-2024 CMG_2023-04 -
Poutloloma

Near Edea, little east of Kopongo, a place regularly visited by many Killifish collectors in Cameroon.

Aphyosemion riggenbachi 'Somakak'
Somakak

Aphyosemion riggenbachi 'Somakak'
West_Cellucam
ADK_9-299 -
West Cellucam
Yabassi
Yabassi



Excerpted from "Karyotype differentiation in Chromaphyosemion killifishes (Cyprinodontiformes, Nothobranchiidae). II: Cytogenetic and mitochondrial DNA analyses demonstrate karyotype differentiation and its evolutionary direction in C. riggenbachi"

(Page 81 Paragraph 3)"However, even assuming that the SA (2n = 30, NF = 44) and WN (2n = 20, NF = 40) populations were the same as the karyotypically similar populations investigated in this study, C. riggenbachi would still comprise at least seven karyotypically different populations, namely the five populations examined here and the YA (2n = 38, NF = 38) and GI (2n = 34, NF = 38) populations investigated by Scheel. Assuming that the pattern of karyotype and haplotype differentiation identified in the present study holds true for C. riggenbachi in general, it is tempting to speculate that the 2n = 38, NF = 38 karyotype, possibly comprising 38 euchromatic arms, may represent the ancestral C. riggenbachi karyotype. However, this hypothesis cannot be tested at present since no live offspring of the specimens sampled by Scheel are available for cytogenetic analyses and the preserved material is not suitable for molecular studies"

- M. Völker, R. Sonnenberg, P. Ráb, and H. Kullmann in "Karyotype differentiation in Chromaphyosemion killifishes (Cyprinodontiformes, Nothobranchiidae). II: Cytogenetic and mitochondrial DNA analyses demonstrate karyotype differentiation and its evolutionary direction in C. riggenbachi" (PDF)

(Page 71) Table 2. Chromosomal characteristics of nine Chromaphyosemion riggenbachi populations. Data from present study (KV03/16, KV03/27, KV03/25, KV03/28, KV03/29), Scheel (1974) (YA, GI, SA) and Scheel (1990) (WN). Chromosomes were classified into groups (a), (b) and (c) as in Fig. 1.
Population 2n NF No. of group (a) chromosomes No. of group (b) chromosomes No. of group (c) chromosomes No. of ec. armsa No. of hc. armsa
KV03/16 36 40 2 2 32 38/37 2/3
KV03/27 30/31 44 8/7 8 14/16 36 8
KV03/25 24 44 12 8 4 36 8
KV03/28 20 40 16 4 0 36 4
KV03/29 20 40 16 4 0 36 4
YA 38 38 n/a n/a n/a n/a n/a
GI 34 38 n/a n/a n/a n/a
SA 30 44 n/a n/a n/a n/a n/a
WN 20 40 n/a n/a n/a n/a n/a