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Widholzer, R.L., et al. (2023) (4)

Description: Body and head depressed. Dorsal profile of body and head convex from tip of snout to dorsal-fin origin, slightly concave to straight from that point to origin of adipose fin, concave from end of adipose fin to origin of caudal fin. Ventral profile of body straight, body height begins to decrease at pelvic girdle. Body covered with bony plates except along dorsal-fin base and ventral surface between tip of snout and anal-fin origin. Median series with 22-24(13, 23*) lateral plates; lateral-line canal complete and uninterrupted. Three* predorsal plates, seven* plates at base of dorsal fin, four* plates between dorsal and adipose fins and 8*(6), 7(5) or 6(2) plates between adipose fins and caudal fins. Fin rays and body plates covered by small, caudally directed odontodes in regular rows, larger on fin spines Widholzer, R.L., et al. (2023). Habitat: Known from three localities in the Rio Vacacaí sub-basin of the Rio Jacuí basin, laguna dos Patos hydrographic system. Colouration: Body dark brown to black with pale yellow dots, usually smaller than pupil diameter, along body; paired fins with yellow dots, dorsal fin with few inconspicuous light dots on unbranched ray, adipose and caudal fins unmarked. Lighter brown bar on terminus of caudal peduncle. Tip of upper and lower leading rays and outer branched rays of caudal fin with conspicuous yellow spots Widholzer, R.L., et al. (2023). Aquarium Care: The Ancistrus genera make good community fish where they do not grow too big for the aquarium. Some species have different requirements in the aquarium so best to read up on the species you have whereas if they need higher oxygen requirements or not, or if they prefer cooler waters if they originate from the southern parts of South America against the species from further up north. Diet: Algae-eater. Vegetable foods such as cucumber and courgette and also tablet and meaty foods. Reproduction: The female lays her eggs in caves or crevices... that the male has chosen and cleaned.... as a cluster. The male usually then guards the eggs after ejecting the female. The fry then cling to the sides of the cave and when they use up their yolk sac, which is around the four to seven day period, they will be ready to feed on infusuria, vegetable matter, brine shrimp naupli or micro worms. In a community tank a few will survive if enough hiding places are afforded to them. (Prefers cooler waters). Etymology: Latinised from Greek megas (megas), large, great and akanthos (akanthos), thorn, spine, in reference to the large pectoral-fin spines of the new species. A noun in apposition.

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Loricariidae

South America: Three localities in the Rio Vacacaí sub-basin of the Rio Jacuí basin, laguna dos Patos hydrographic system, Brazil.

10.0cm. (4ins)

22-25°c (71-77°f.)

6.0-7.5.

Fish in the News (2024)
Widholzer RL, Borsoi J, Reis RE, Lehmann A. P. A new species of Ancistrus (Siluriformes: Loricariidae), with a redescription of Ancistrus brevipinnis and further evidence of hidden diversity in the laguna dos Patos system, Brazil. Neotrop Ichthyol. 2023; 21(4):e230078.