Haplochromis pardus 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.6502616
Popis: Haplochromis pardus sp. nov. urn:lsid:zoobank.org:act: 8DDACAC6-C993-4750-BE1B-1BF4C0312DB7 Figs 1–2, 32–34; Table 1 Differential diagnosis Species with a piscivorous morphology; adult size small (max. known size 96 mm SL); outer oral teeth many and small [UOT 39–56 (median 58)]; dominant males speckled to uniformly black. Amongst piscivorous species from the Lake Edward system, H. pardus sp. nov. differs from all by the combination of a smaller adult size (max. 96 vs 109–211 mm SL) and colour pattern of small specimens (H. latifrons sp. nov., H. mentatus, H. glaucus sp. nov., H. kimondo sp. nov., and H. squamipinnis by the combination of a shallower cheek [ChD 20.8–24.4 (mean 22.5) vs 23.8–36.0 (26.4– 30.9) % HL] and a narrower interorbital area [IOW 39.3–48.4 (44.6) vs 48.6–63.3 (51.9–60.0) % HW]. It further differs from H. rex sp. nov., H. simba sp. nov., and H. aquila sp. nov. by the combination of a shallower cheek [ChD 20.8–24.4 (22.5) vs 26.8–33.5 (28.3–31.1) % HL], smaller outer oral teeth, and a larger number of outer upper jaw teeth [UOT 39–51 (45) vs 22–37 (27–31)]. It further differs from H. falcatus sp. nov. by the combination of by weakly recurved vs strongly recurved outer jaw teeth, a shallower cheek [ChD 20.8–24.4 (22.5) vs 25.1–28.0 (exceptionally 23.3 in one specimen) (mean 26.0) % HL], and a shorter pre-dorsal distance [PrD 34.1–37.8 (36.0) vs 38.2–41.1 (exceptionally 36.9 in one specimen) (mean 39.5) % SL]. It further differs from H. curvidens sp. nov. by the combination of a longer anal-fin base [AFB 19.2–22.2 (20.5) vs 17.9–18.6 (18.3) % SL] and a slightly narrower interorbital area [IOW 39.3–48.4 (44.6) vs 46.4–52.5 (49.1) % HW]. It further differs from H. quasimodo sp. nov. by the combination of a shallower cheek [ChD 20.8–24.4 (22.5) vs 23.7–32.9 (27.5) % HL] and a smaller number of caudal peduncle scales (CPS 16, rarely 17 vs 17–20, rarely 16). Etymology Specific name from the Latin ‘ pardus ’ for ‘leopard’; referring to nearly uniform black to yellow-pink flanks with clear black blotches, i.e., interrupted horizontal and vertical stripes. Material examined Holotype UGANDA • ♂, 89.2 mm SL; Lake Edward, Mukutu Kihinga, rocky offshore of Mweya; 0°11′31.2″ S, 29°52′26.4″ E; 23 Oct. 2016; HIPE1 exped. leg.; RMCA 2016.035.P.0202. Paratypes UGANDA – Lake Edward • 1 ♀, 84.9 mm SL; Mukutu Kihinga, rocky offshore of Mweya; 0°11′31.2″ S, 29°52′26.4″ E; 23 Oct. 2016; HIPE1 exped. leg.; RMCA 2016.035.P.0203 • 2 ♂♂, 2 ♀♀, 83.6–96.1 mm SL; mouth of Kazinga Channel; 0°12′32.4″ S, 29°53′06.0″ E; 24 Oct. 2016; HIPE1 exped. leg.; RMCA 2016.035.P.0204 to 0207 • 1 ♀, 1 ♂, 75.9, 84.7 mm SL; Rwenshama rocky shore; 0°24′05.7″ S, 29°46′35.1″ E; 26 Mar. 2017; HIPE2 exped. leg.; RMCA 2017.006.P.0342 to 0343 • 3 ♀♀, 67.4– 70.5 mm SL; Kayanja offshore; 0°05′34.8″ S, 29°45′28.8″ E; 30 Mar. 2017; HIPE2 exped. leg.; RMCA 2017.006.P.0346 to 0348 • 1 ♀, 1 ♂, 67.7, 78.1 mm SL; Kayanja offshore; 0°05′34.8″ S, 29°45′28.8″ E; 30 Mar. 2017; HIPE2 exped. leg.; RMCA 2017.006.P.0344 to 0345 • 1 ♀, 92.4 mm SL; islands near Katwe; 0°10′04.9″ S, 29°52′27.4″ E; 19 Jan. 2018; HIPE3 exped. leg.; RMCA 2018.008.P.0331 • 1 ♀, 1 ♂, 72.3, 81.7 mm SL; Rwenshama rocky shore; 0°24′05.7″ S, 29°46′35.1″ E; 24 Jan. 2018; HIPE3 exped. leg.; RMCA 2018.008.P.0332 to 0333 • 2 ♀♀, 2 ♂♂, 71.0– 84.9 mm SL; Rwenshama rocky shore; 0°24′05.7″ S, 29°46′35.1″ E; 26 Mar. 2017; HIPE2 exped. leg.; IRSNB 920 to 922. Description Based on 20 specimens (67.4–96.1 mm SL); body shallow (Table 1) and oval to slightly rhomboid (Fig. 32). Head narrow, shallow, and with a straight dorsal outline with a concavity above eye; eye average in size in comparison to generalised H. elegans (but large for a piscivorous species); interorbital area very narrow; cheek shallow; lacrimal average in depth. Snout average in length, very acute, and slopes gently at 30–40°; premaxillary pedicel long and prominent. Jaws iso- to slightly prognathous, average in length, narrow, and rounded in dorsal view; gape large and slopes gently at 15–25°; maxilla extends to between verticals through anterior margins of orbit and pupil. Lower jaw shallow and with straight ventral outline in lateral view, mental prominence absent, and lower jaw side nearly flat with an inclination of 15–30° to horizontal in anterior view. Upper jaw weakly expanded anteriorly and ventrally. Lips and oral mucosa large. Neurocranium average in depth, ethmo-vomerine block decurved, preorbital region very shallow (18–22% NL), orbital region average in depth (30–33% NL), and supraoccipital crest shallow and wedge-shaped (Fig. 33b). Outer oral teeth numerous, small, and weakly embedded in oral mucosa. Necks stout, cylindrical, and straight; crowns weakly recurved, unicuspid in large specimens ( 70 mm), and acutely pointed in all specimens. Dental arcades rounded and with anterior half weakly expanded laterally. Outer teeth closely and regularly set with neck-distances of ½ neck-width; lateral outer teeth implanted slightly labially. In upper jaw, 1–3 posteriormost teeth enlarged. Inner teeth small, recurved, unicuspid in large specimens (> 80 mm), 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 58-62, DOI: 10.5852/ejt.2022.815.1749, http://zenodo.org/record/6484153
Databáze: OpenAIRE
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