Trichogenes claviger de Pinna, Helmer, Britski & Nunes, 2010
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Trichogenes claviger
拍攝者 Sarmento-Soares, L.M.
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拍攝者 Sarmento-Soares, L.M.
分類 / 名稱 俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei > Siluriformes (Catfishes) 鯰形目 (Catfishes) > Trichomycteridae (Pencil or parasitic catfishes) 毛鼻鯰科 (Pencil or parasitic catfishes) > Trichogeninae
Etymology: Trichogenes: Greek, thrix = hair + Greek, genes, genesis = birth, race (Ref. 45335); claviger: The specific name refers to club-bearing in Latin, an allusion to the peculiar shape of the hypertrophied posterior process of the opercle in males of this species. An adjective.
Etymology: Trichogenes: Greek, thrix = hair + Greek, genes, genesis = birth, race (Ref. 45335); claviger: The specific name refers to club-bearing in Latin, an allusion to the peculiar shape of the hypertrophied posterior process of the opercle in males of this species. An adjective.
環境： 環境 / 氣候帶 / 深度上下限 / 配送範圍 生態學
; 淡水 居於水底的.
分布 領土 | FAO區域 | 生態系 | 發現紀錄 | 分布圖 | 簡介 | Faunafri
South America: known only from the type locality, an upland tributary of the headwaters of the rio Itapemirim drainage in southeastern Brazil.
大小 / 重量 / 年齡
簡短描述 檢索表 | 型態特徵 | 形態測量圖
Three autapomorphies distinguish T. claviger from all other members of the family: the sexually dimorphic posterior process of the opercle, much elongated in males (vs. short in both males and females); the terminal mouth (vs.subterminal or inferior); and the presence of an anterodorsal claw-like process on the dorsal surface of the neural arch of each of the anterior four free vertebrae. This species is distinguished from T. longipinnis, by several additional characteristics (some of which may also be autapomorphic, pending more detailed analysis): shape of the interopercle, with odontodes extending onto the posterodorsal margin of the interopercle on a bony expansion (vs. odontodes mostly restricted to ventral and posterior margins of the bone); posterior naris broader than long (vs. round); presence of an entirely differentiated fleshy lobe laterally on the lower lip (vs. fleshy lobe mostly continuous with the lower lip); no branched anal-fin rays in specimens of any size (vs. most rays branched in specimens over 41 mm SL); less deep caudal peduncle, 9.3-11.5 (vs. 10.3-12.6% SL); deeper head, head depth 72.9-86.6 (vs. 50.3-62.8% HL); no antorbital (vs. plate-like antorbital present dorsally to antorbital process of lateral ethmoid); deep coronoid process of the lower jaw (vs. coronoid process approximately one-third less deep); flattened bifurcated tooth cusps, with roundish margins (vs. bifurcated tooth cusps conical, pointed); vertebrae 35 (vs. 38 or 39); branchiostegal rays 6 (vs. 7); no pelvic splint (vs. present); pleural ribs 8 (vs. 10 or 11); few sparse dark spots on body (spots more numerous and more densely arranged); well-defined thin dark line along base of anal fin, formed by a regular row of slanted elongate spots on the distal portion of each pterygiophore (vs. no such line); no dark spots on the sides of head (vs. lateral surfaces of head with roundish spots); dark spots on body not extending onto base of caudal fin (vs. spots covering bases of principal caudal-fin rays). The deepest part of the body of T. claviger is at the middle of the abdomen, continuously less deep posteriorly to the base of the caudal fin, and the dorsal and ventral profiles of the head forming broad symmetrical arcs with the body profile, and these result in a rather different general aspect when compared to T. longipinnis, where the deepest part of the body is at the origin of the anal fin, and the body depth is approximately even along its entire length, only slightly decreasing towards the caudal fin. Also, the dorsal and ventral profiles of the head and body are not symmetrical, in T. claviger, it is gently convex and in T. longipinnis it is approximately straight (Ref. 85858).
Body shape (shape guide): elongated.
Body shape (shape guide): elongated.
The specimens were collected in a shallow sector (ca. 30 cm) of the córrego Picada Comprida, on a plateau at ca. 1150 m altitude, water is darkly tea-stained and transparent, with slow current and negligible altitudinal gradient. The stream runs through an area of moderately impacted high-altitude rainforest mingled with sectors of exotic pine culture. The substrate is mostly exposed sand, with masses of accumulated leaf litter and other vegetable debris in many spots. Fish were concentrated on quiet shaded areas with litter, swimming in midwater, and were collected with hand seines. No associated fish species were found with this species. Gut contents revealed numerous disarticulated arthropod remains, indicating that the feeding habits of the species are broadly similar to those of T. longipinnis. The species were also observed swimming in two other nearby spots in tributaries to the córrego Picada Comprida, but were not seen in four additional collection points in the same stream system and their distribution seems to be patchy (Ref. 85858).
生命週期和交配行為 成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
主要參考資料
上傳您的推薦信 | 參考文獻 | 合作者 : Pinna, Mário de | 合作者
de Pinna, M.C.C., J.L. Helmer, H.A. Britski and L.R. Nunes, 2010. A new species of Trichogenes from the rio Itapemirim drainage, southeastern Brazil, with comments on the monophyly of the genus (Siluriformes: Trichomycteridae). Neotrop. Ichthyol. 8(4):707-717. (Ref. 85858)
IUCN 瀕危狀態 (Ref. 130435: Version 2025-2 (Global))
極危 (CR) (B2ab(iii)); Date assessed: 07 November 2018
CITES
Not Evaluated
對人類具威脅
人類使用
FAO - Publication: search | FishSource |
更多資訊
營養生態學
食物項目（獵物）
食性組成
食物消耗量
食物配給
捕食者
食物項目（獵物）
食性組成
食物消耗量
食物配給
捕食者
生態學
生態學
生態學
人口動態
成長參數
最大年齡/尺寸
長度重量比
長度關係
長度-頻率
質量轉換
入添量
豐度
成長參數
最大年齡/尺寸
長度重量比
長度關係
長度-頻率
質量轉換
入添量
豐度
解剖學
鰓區
腦部
耳石
鰓區
腦部
耳石
生理學
身體成分
營養素
耗氧量
游泳類型
游泳速度
視覺色素
魚聲
疾病與寄生蟲
毒性 (LC50s)
身體成分
營養素
耗氧量
游泳類型
游泳速度
視覺色素
魚聲
疾病與寄生蟲
毒性 (LC50s)
遺傳學
基因組
遺傳學
異種性
遺傳率
遺傳多樣性
基因組
遺傳學
異種性
遺傳率
遺傳多樣性
工具
特別的報告
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網路資源
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基於模型的估計
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系統發育多樣性指數 (參考文獻 82804) |
PD50 = 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high]. |
| Bayesian length-weight | a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref. 93245). |
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營養階層 (參考文獻 69278) |
3.2 ±0.4 se; based on size and trophs of closest relatives |
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釣魚的脆弱性 (Ref. 59153) |
Low vulnerability (10 of 100). 🛈 |