Published February 20, 2025
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TABLE 2 in A new species of Louisea Cumberlidge, 1994, a freshwater crab from the Ekom-Nkam Waterfall, Cameroon (Brachyura: Potamonautidae: Liberonautinae)
Authors/Creators
- 1. Département de Gestion des Écosystèmes Aquatiques, Institut des Sciences Halieutiques, Université de Douala à Yabassi, Douala- Bassa P. O. Box 7236, Cameroon. & Museum fur Naturkunde, Leibniz Institute for Evolution and Biodiversity Science, Invalidenstrasse 43, 10115 Berlin, Germany. & Unit of Biodiversity Discovery and Conservation, Cameroon Association for Research on Crustaceans and Others Aquatic Resources, Obala P. O. Box 43, Cameroon.
- 2. Museum fur Naturkunde, Leibniz Institute for Evolution and Biodiversity Science, Invalidenstrasse 43, 10115 Berlin, Germany.
- 3. Department of Life Sciences, The Natural History Museum, London, SW 7 5 BD, UK.
- 4. Department of Biology, Northern Michigan University, Marquette, MI 49855 - 5376, USA.
Description
TABLE 2. Differences between the five species of Louisea.
| Character | L. cataracta sp. nov. | L. nkongsamba | L. yabassi | L. balssi | L. edeaensis |
|---|---|---|---|---|---|
| Postfrontal crest | Complete, traversing entire carapace | Incomplete, obscure between epigastric crests and lateral ends | Complete, traversing entire carapace | Incomplete, obscure between epigastric crests and lateral ends | Incomplete, obscure between epigastric crests and lateral ends |
| Major chela dactylus | Slightly curved, leaving long narrow interspace when chela tips touching | Slightly curved, leaving long narrow interspace when chela tips touching | Slightly curved, leaving long narrow interspace when chela tips touching | Highly arched, leaving oval interspace when chela tips touching | Slightly curved, leaving long narrow interspace when chela tips touching |
| Major cheliped propodus dentition | 3 teeth proximally, 1 tooth distally | 3 teeth proximally, 1 tooth distally | 3 teeth proximally, 1 tooth distally | 2 teeth proximally, 2 teeth distally | 3 teeth proximally, 1 tooth distally |
| Cheliped carpus inner margin teeth | Distal tooth long & pointed, proximal tooth subequal | Distal tooth long & pointed, proximal tooth subequal | Distal tooth long & pointed, proximal tooth subequal | Distal tooth small & blunt, proximal tooth subequal | Distal tooth long & pointed, proximal tooth subequal |
| Cheliped carpus inner margin teeth | Small granular tooth between distal & proximal teeth | Small granular tooth between distal & proximal teeth | Small granular tooth between distal & proximal teeth | No granular tooth between distal & proximal teeth | Small granular tooth between distal & proximal teeth |
| Sternal sulcus S2/3 | Incomplete, not traversing sternum, lateral ends not meeting sternal side margins | Complete lateral ends meeting sternal side margins | Complete lateral ends meeting sternal side margins | Complete lateral ends meeting sternal side margins | Complete lateral ends meeting sternal side margins |
| Sternal sulcus S3/4 | Incomplete, not traversing sternum, reduced to short sections at the lateral ends, otherwise obscure | Incomplete, not traversing sternum, long sections at the lateral ends, short mid part obscure | Incomplete, not traversing sternum, reduced to short sections at the lateral ends, otherwise obscure | Incomplete, not traversing sternum, reduced to short sections at the lateral ends, otherwise obscure | Incomplete, not traversing sternum, long sections at the lateral ends, short mid part obscure |
| Sternal segment S4 | Side margins flat | Side margins raised, thickened | Side margins flat | Side margins flat | Side margins flat |
| Sternal segment S3 | Side margins flat | Side margins raised, thickened | Side margins flat | Side margins raised, thickened | Side margins flat |
Notes
Published as part of Mvogo Ndongo, Pierre A., Rintelen, Thomas Von, Clark, Paul F. & Cumberlidge, Neil, 2025, A new species of Louisea Cumberlidge, 1994, a freshwater crab from the Ekom-Nkam Waterfall, Cameroon (Brachyura: Potamonautidae: Liberonautinae), pp. 120 in Zootaxa 5590 (1) on page 120, DOI: 10.11646/zootaxa.5590.1.6, http://zenodo.org/record/14952808
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