Haplochromis kimondo Vranken & Steenberge & Heylen & Decru & Snoeks 2022, sp. nov

Autor: Vranken, Nathan, Steenberge, Maarten Van, Heylen, Annelies, Decru, Eva, Snoeks, Jos
Rok vydání: 2022
Předmět:
DOI: 10.5281/zenodo.6484188
Popis: Haplochromis kimondo sp. nov. urn:lsid:zoobank.org:act: 24F01142-A596-458D-9887-D5BC8E68A275 Figs 1–2, 23–25; Table 1 Differential diagnosis Species with a piscivorous morphology; head blunt and with convex dorsal outline; cheek deep [ChD 27.1–35.2 (mean 30.9) % HL]; outer oral teeth many and small [UOT 43–70 (median 56)]; dominant males grey dorsally and yellow ventrally. Amongst piscivorous species from the Lake Edward system, H. kimondo sp. nov. differs from H. latifrons sp. nov., H. mentatus, H. rex sp. nov., H. simba sp. nov., H. glaucus sp. nov., and H. aquila sp. nov. by the combination of a broader head [HW 42.9–48.0 (45.1) vs 36.8–43.7 (39.2–42.0) % HL], small vs large outer oral teeth, and a larger number of outer upper jaw teeth [UOT 43–70 (56) vs 22–47 (27–36)]. It differs from H. falcatus sp. nov., H. curvidens sp. nov., H. pardus sp. nov., H. quasimodo sp. nov., and H. squamipinnis by the combination of body pyriform vs oval to rhomboid, and snout blunt vs (very) acute in dorsal view. It further differs from H. falcatus sp. nov. and H. curvidens sp. nov. by the combination of deeper cheeks [ChD 27.1–35.2 (30.9) vs 22.4–28.0 (23.2–26.0) % HL], broader jaws [LJW 44.7–53.3 (49.3) vs 38.5–45.5 (40.8–42.5) % LJL], and a slightly broader head [HW 42.9–48.0 (45.1) vs 39.9–44.4 (42.6– 43.4) % HL]; further from H. falcatus sp. nov. by dominant males grey dorsally and yellow ventrally vs olive-green with an orange-red anterior part of flank; further from H. curvidens sp. nov. by presence vs absence of a well-defined mid-lateral band in all specimens. It further differs from H. pardus sp. nov., H. quasimodo sp. nov., and H. squamipinnis by a steeper sloping snout (40–50° vs 30–40°) and dominant males grey dorsally and yellow ventrally vs speckled to uniformly black, light grey dorsally and blue-black ventrally, or slate blue, respectively; further from H. pardus sp. nov. and H. quasimodo sp. nov. by a broader interorbital area [IOW 49.2–58.5 (52.8) vs 39.3–48.7 (43.9–44.6) % HW]; further from H. squamipinnis by absence vs presence of minute scales on proximal part of dorsal and anal fins. Etymology Specific name from the Swahili ‘kimondo’ for ‘meteor’; referring to blunt head, pyriform body with mid-lateral band, and yellow colouration of ventral part of body. Material examined Holotype UGANDA • ♂, 152.4 mm SL; Lake Edward, Kayanja offshore; 0°05′34.8″ S, 29°45′28.8″ E; 21 Mar. 2019; HIPE4 exped. leg.; RMCA 2019.002.P.0015. Paratypes DEMOCRATIC REPUBLIC OF THE CONGO • 1 ♀, 158.2 mm SL; “Lac Edouard: au large de la riv. Kigera” [Lake Edward: offshore of the Kigera River]; 0°29′42″ S, 29°38′14″ E (inferred); 25 May 1953; KEA exped. leg.; IRSBN 13477 • 1 ♂, 1 ♀, 149.9, 171.3 mm SL; “Lac Edouard: 2–3 km à l’Ouest de Kiavinionge” [Lake Edward: 2–3 km west of Kiavinionge]; 0°11′39″ S, 29°32′31″ E (inferred); 1 Jun. 1953; KEA exped. leg.; IRSBN 13482. UGANDA – Lake Edward • 1 ♀, 146.4 mm SL; Rwenshama; 0°24′05.7″ S, 29°46′35.1″ E; 8 Nov. 2016; HIPE1 exped. leg.; rocky shore; RMCA 2016.035.P.0226 • 3 ♀♀, 103.8–124.4 mm SL; Rwenshama,; 0°24′05.7″ S, 29°46′35.1″ E; 26 Mar. 2017; HIPE2 exped. leg.; rocky shore; RMCA 2017.006.P.0360 to 0362 • 1 ♀, 1 ♂, 106.4–131.1 mm SL; Kayanja offshore; 0°05′34.8″ S, 29°45′28.8″ E; 31 Mar. 2017; HIPE2 exped. leg.; RMCA 2017.006.P.0363 to 0364 • 2 ♂♂, 1 ♀, 81.6–118.4 mm SL; same collection data as for preceding; RMCA 2017.006.P.0365 to 0367 • 1 ♂, 2 ♀♀, 89.6–115.9 mm SL; Kayanja offshore; 0°05′31.2″ S, 29°45′30.3″ E; 20 Jan. 2018; HIPE3 exped. leg.; RMCA 2018.008.P.0358 to 0360 • 2 ♂♂, 2 ♀♀, 128.1–146.8 mm SL; 0°24′16.0″ S, 29°46′24.8″ E; 24 Jan. 2018; HIPE3 exped. leg.; bought at Rwenshama landing site; RMCA 2018.008.P.0361 to 0364 • 1 ♀, 142.9 mm SL; Rwenshama; 0°24′05.7″ S, 29°46′35.1″ E; 24 Jan. 2018; HIPE3 exped. leg.; rocky shore; RMCA 2018.008.P.0357. Description Based on 21 specimens (81.6–171.3 mm SL); body shallow (Table 1) and pyriform (Fig. 23). Head long, stout, average in width in comparison to generalised H. elegans (but broad for a piscivorous species), and with a convex dorsal outline; eye small; interorbital area average in width; cheek and lacrimal deep. Snout long, blunt, and slopes at 40–50°; premaxillary pedicel long and slightly prominent. Jaws isognathous to slightly prognathous, long, relatively stout, rounded in dorsal view, and narrow; gape large and slopes at 25–30°; maxilla extends to vertical through pupil. Lower jaw with a straight ventral outline in lateral view, mental prominence absent or weakly developed, and lower jaw side nearly flat with an inclination of 15–30° to horizontal in anterior view. Upper jaw weakly expanded anteriorly. Lips and oral mucosa large. Neurocranium average in depth, ethmo-vomerine block decurved, preorbital region average in depth (23–25% NL), orbital region average in depth (31–33% NL), and supraoccipital crest shallow and wedge-shaped (Fig. 24b). Outer oral teeth numerous and very small. Necks stout, conical, and straight; crowns recurved and unicuspid in large specimens (> 85 mm SL), bicuspid in small specimens ( 100 mm SL), weakly tricuspid in small specimens (
Published as part of Vranken, Nathan, Steenberge, Maarten Van, Heylen, Annelies, Decru, Eva & Snoeks, Jos, 2022, From a pair to a dozen: the piscivorous species of Haplochromis (Cichlidae) from the Lake Edward system, pp. 1-94 in European Journal of Taxonomy 815 on pages 44-48, DOI: 10.5852/ejt.2022.815.1749, http://zenodo.org/record/6484153
Databáze: OpenAIRE
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