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Nannocharax chochamandai Katemo Manda, Snoeks, Decru, Brecko & Vreven, 2023

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drawing shows typical species in Distichodontidae.

分類 / Names 俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa

Teleostei > Characiformes (Characins) > Distichodontidae (Distichodus)
Etymology: Nannocharax: Latin, nannus = small + Greek, charax = a marine fish without identification (Ref. 45335).

Environment: milieu / climate zone / depth range / distribution range 生態學

; 淡水 大洋性; pH range: 7.0 - 8.4; 深度上下限 1 - 2 m (Ref. 129519). 18°C - 29°C (Ref. 129519)

分布 國家 | FAO區域 | 生態系 | 發現紀錄 | Point map | 簡介 | Faunafri

Africa: Lower Lufira, Fungwe and Mwanza River (both smaller right bank affluents of the Upper Lualaba), Luvua basin and Lukuga basin in Democratic Republic of the Congo (Ref. 129519).

大小 / 重量 / 年齡

Maturity: Lm ?  range ? - ? cm
Max length : 3.8 cm SL 雄魚/尚未辨別雌雄; (Ref. 129519)

簡短描述 檢索表 | 型態特徵 | 形態測量圖

背棘 (總數) : 0; 背的軟條 (總數) : 14 - 15; 臀棘: 0; 臀鰭軟條: 11 - 12; 脊椎骨: 37 - 38. Diagnosis: Nannocharax chochamandai can be distinguished from all its congeners by the following unique combination of characters: its body colouration, which consists of eight to 10 ovoid black blotches that overlie a longitudinal mid-lateral black stripes vs. largely unpigmented body with a black spot on the posterior portion of the caudal peduncle in N. hastatus, N. maculicauda and N. ocellicauda, six or seven rounded, well-spaced, mid-lateral black spots in N. gracilis, 17 black bars in N. fasciolaris, a broad black longitudinal band running on flanks along two rows of scales in N. latifasciatus, a thin black lateral band covering only the lateral line scales, extending from snout to median rays of caudal fin in N. taenia; a completely pored lateral line vs. incompletely pored in N. angolensis, N. dageti, N. lineostriatus, N. machadoi, N. minutus, N. monardi, N. multifasciatus, N. rubensteini, N. uniocellatus and N. wittei; 41-46 lateral line scales vs. 38-40 scales in N. altus, 37-40 scales in N. brevis, 36-37 scales in N. micros, 36 scales in N. ogoensis, 38 scales in N. pteron, 38-39 scales in N. schoutedeni, 52-57 scales in N. elongatus, 47-53 scales in N. lineomaculatus, 50-55 scales in N. niloticus and 50-56 scales in N. occidentalis; and a dorsal-fin origin that is situated before the pelvic-fin origin vs. origin situated behind the pelvic-fin origin in N. fasciatus, N. hadros, N. procatopus, N. reidi, N. rubrolabiatus, N. seyboldi and N. signifer or situated at the level of pelvic-fin origin in N. intermedius and N. parvus (Ref. 129519). Nannocharax chochamandai has a long distance between the anus and the articulation of the first anal-fin ray, 10.1-14.9% of standard length, vs. 0.9-1.9% in N. usongo and 2.2-3.8% in N. zebra; a high number of unbranched dorsal-fin rays, 11-12 vs. 9-10 in N. hollyi and N. ansorgii; a short pectoral fin, 21.6-28.4% of standard length and the dorsal fin translucent without band vs. 28.6-31.6% of standard length and dorsal fin with two brown bands in N. macropterus (Ref. 129519). Nannocharax chochamandai is most similar to N. luapulae and can be distinguished from it by a high number of branched soft rays in dorsal and anal fin, 11-12 and 8-9 vs. 9-10 and 5; a low number of lateral line scales, 41-46 vs. 49-55; a long pectoral fin, 21.6-28.4% of standard length, reaching the pelvic-fin insertion and being situated about mid-level of the dorsal-fin base, vs. 18.3-20.6% of standard length, not reaching the pelvic-fin insertion and being situated at the level of the anterior origin of the dorsal-fin base; a long pelvic fin, 24.3-30.6% of standard length, reaching the anal-fin insertion and being situated at the level of the last quarter of the dorsal-adipose fin distance, vs. 20.0-22.9% of standard length, not reaching the anal-fin insertion and being situated about mid-level the dorsal-adipose distance; and a long anal fin, 15.6-19.0% of standard length vs. 13.6-15.1% (Ref. 129519).

生物學特性     字彙 (例如 epibenthic)


Life cycle and mating behavior 成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚


主要參考資料 Upload your references | 參考文獻 | 合作者 | 合作者

Katemo Manda, B., J. Snoeks, E. Decru, J. Brecko and E.J.W.M.N. Vreven, 2023. Revision of Nannocharax luapulae Boulenger, 1915 (Characiformes: Distichodontidae) from the Upper Congo basin: evidence for a species pair. J. Fish Biol. 103(3):557-573. (Ref. 129519)

IUCN 瀕危狀態 (Ref. 130435: Version 2024-2)

未評估 

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

對人類具威脅

 





人類使用

漁業: 潛在的興趣
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參考文獻

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Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = No PD50 data   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00447 (0.00189 - 0.01058), b=3.17 (2.96 - 3.38), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
營養階層 (Ref. 69278):  3.1   ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref. 59153):  Low vulnerability (10 of 100).
價格種類 (Ref. 80766):   Unknown.