Marcusenius

Marcusenius Gill, 1862

Languages: English

Overview

General Description

Practical key for Marcusenius species with eight circumpeduncular scales from Boden et al. (1997)

Note: This key applies ONLY to those species with large scales and eight scales around the peduncle.

Fewer than 29 dorsal-fin rays, dorsal-fin origin posterior to or in line with the anal fin origin and dorsal-fin length shorter than anal-fin length.  → 2

- More than 26 dorsal-fin rays, dorsal-fin origin anterior to the anal-fin origin and dorsal-fin length equal to or greater than anal-fin length → 7

2: 21 or more transverse scale rows between dorsal- and anal-fin origins and more than 42 lateral-line scales  → 3

- 20 or fewer transverse scale rows between dorsal- and anal-fin origins and fewer than 45 lateral-line scales  → 6

3: Dorsal fin slightly concave with rounded anterior margin, dorsal-fin rays 22-26, anal fin rays 31-34, 54-61 lateral-line scales and total vertebrae 48-49.  → Marcusenius fuscus

- Dorsal fin deeply concave with pointed anterior margin; not with all these characters  → 4

4: Two rows of scales on transverse dark band between dorsal- and anal-fin origins, submental swelling small, 42-54 lateral-line scales and 32-35 anal-fin rays.  → Marcusenius schilthuisiae

- Three or more rows of scales on a transverse dark band between dorsal- and anal-fin origin, sub-mental swelling well developed, 49-61 lateral-line scales and 26-33 anal-fin rays  → 5

5: 20-23 dorsal-fin rays; 26-30 anal-fin rays and dorsal-fin height about same as its length which is approximately 25% of the predorsal distance  → Marcusenius dundoensis

- 24-28 dorsal-fin rays; 29-33 anal-fin rays and dorsal-fin height less than its length which is approximately 35% of the predorsal distance.  → Marcusenius sanagaensis

6: Mouth subinferior; three scale rows on transverse dark band between dorsal- and anal-fin origin → Marcusenius intermedius

- Mouth terminal; two, sometimes three, scale rows on transverse dark band between dorsal- and anal-fin origin. → Marcusenius moorii

7: 27-31 dorsal-fin rays; ratio dorsal-fin length/anal-fin length < 1.25.  → Marcusenius kutuensis

- 32-34 dorsal-fin rays; ratio dorsal-fin length/anal-fin length > 1.25.  → Marcusenius ghesquierei

Author(s): Boden, G.; Teugels, G.; Hopkins, C.D.
Rights holder(s): Boden, G.; Teugels, G.; Hopkins, C.D.

Taxonomic Children

Total: 42

Marcusenius abadii (Boulenger, 1901), Marcusenius altisambesi Kramer, Skelton, van der Bank & Wink 2007, Marcusenius angolensis (Boulenger, 1905), Marcusenius annamariae (Parenzan, 1939), Marcusenius bentleyi (Boulenger, 1897), Marcusenius brucii (Boulenger, 1910), Marcusenius caudisquamatus Maake, Gon & Swartz, 2014, Marcusenius cuangoanus (Poll, 1967), Marcusenius cyprinoides (Linnaeus, 1758), Marcusenius deboensis (Daget, 1954), Marcusenius devosi Kramer, Skelton, van der Bank & Wink, 2007, Marcusenius dundoensis (Poll, 1967), Marcusenius friteli (Pellegrin, 1904), Marcusenius furcidens (Pellegrin, 1920), Marcusenius fuscus (Pellegrin, 1901), Marcusenius gracilis Kramer, 2013, Marcusenius greshoffii (Schilthuis, 1891), Marcusenius intermedius Pellegrin, 1924, Marcusenius kainjii Lewis, 1974, Marcusenius krameri Maake, Gon & Swartz, 2014, Marcusenius kutuensis (Boulenger, 1899), Marcusenius leopoldianus (Boulenger, 1899), Marcusenius livingstonii (Boulenger, 1899), Marcusenius lucombesi Maake, Gon & Swartz, 2014, Marcusenius macrolepidotus Peters, 1852), Marcusenius macrophthalmus (Pellegrin, 1924), Marcusenius mento (Boulenger, 1890), Marcusenius meronai Bigorne & Paugy, 1990, Marcusenius monteiri (Günther, 1873), Marcusenius moorii (Günther, 1867), Marcusenius multisquamatus Kramer & Wink, 2013, Marcusenius ntemensis (Pellegrin, 1927), Marcusenius pongolensis (Fowler, 1934), Marcusenius rheni (Fowler, 1936), Marcusenius rhodesianus (Määr, 1962), Marcusenius sanagaensis Boden, Teugels & Hopkins, 1997, Marcusenius schilthuisiae (Boulenger, 1899), Marcusenius senegalensis (Steindachner, 1870), Marcusenius stanleyanus (Boulenger, 1897), Marcusenius thomasi (Boulenger, 1916), Marcusenius ussheri (Günther, 1867), Marcusenius victoriae (Worthington, 1929)

References

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