分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Siluriformes (Catfishes)
鯰形目 (Catfishes) >
Loricariidae (Armored catfishes)
甲鯰科 (Armored catfishes) > Hypostominae
Etymology: Hypostomus: Greek, hypo = under + Greek, stoma = mouth (Ref. 45335); rhantos: Rhantos is Greek for sprinkled, speckled, or spotted and refers to the tiny randomly placed spots of the species (Ref. 58737).
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 底中水層性. 熱帶; 5°N - 3°N, 66°W - 67°W
South America: Venezuela. Currently known from the Río Ventuari, a tributary of the upper Río Orinoco, and the mainstem upper Orinoco above Puerto Ayacucho to the Río Casiquiare in Amazonas (Ref. 58737).
南美洲: 委內瑞拉。 現在已知來自 Rio Ventuari ，上面 Rio 奧里諾科河的一個支流了, 與 mainstem 在 Amazonas 的在 Puerto Ayacucho 到 Rio Casiquiare 上面的上面奧里諾科河.(參考文獻 58737)
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 19.6 cm SL 雄魚/尚未辨別雌雄; (Ref. 58737)
簡短描述
型態特徵 | 形態測量圖
Hypostomus rhantos is described for a uniquely pigmented species of loricariid catfish from the upper Río Orinoco of Amazonas, Venezuela. Light gray to tan when alive, becoming tan when preserved. Body densely covered with tiny spots, head spots even smaller than body spots. Spots present on all fins, generally larger than spots on body, evenly distributed on rays, spines, and membranes. Caudal fin membranes light and spotted anteriorly, fading to dark wash posteriorly. Abdomen lighter than sides, with tiny spots. Occasionally with four dorsal saddles, first below anterior dorsal-fin rays, second below and slightly behind posterior dorsal-fin rays, third below and slightly anterior to adipose-fin spine, and fourth at base of caudal peduncle; all saddles angled anteriorly, saddles one and two combine and continue to base of pelvic fin, third and fourth terminating at middle of midventral plate row. Fin spines usually lighter than rest of body. Spots relatively larger in juveniles. Juveniles with fewer spots distally on all fins, lower half of caudal fin much darker. Head and nape forming arch from tip of snout to origin of dorsal fin. Body depth decreasing from origin of dorsal fin to dorsal procurrent caudal spines then increasing to caudal fin. A rounded ridge present from anterodorsal corner of orbit, running ventral to nares, and ending slightly anteroventral of anterior nare. Longitudinal ridge of raised bone and slightly larger odontodes present on pterotic-supracleithrum beginning at posterodorsal corner of orbit and contiguous with supraorbital ridge. Space between orbits concave such that supraorbital ridge higher than medial surface of head. Supraoccipital convex medially with slight crest (Ref. 58737).
Hypostomus rhantos 為一個甲鯰科鯰魚從的獨特著色種 Amazonas ，委內瑞拉的上面 Rio 奧里諾科河被描述。 淡灰色的到黃褐色的當活著的時候, 變成黃褐色在保存狀態下。 身體甚至濃密地覆蓋著極小的斑點，頭部斑點了比身體斑點更小。 斑點在身體上位於所有的鰭 , 通常大於斑點之上, 均勻地在鰭條，棘與薄膜上分佈。 尾鰭薄膜淡與有斑點的前面地, 在後部地褪成深色的洗。 腹部顏色淡的超過側邊, 有極小的斑點。 偶然地有四個背部的鞍狀斑, 第一個在前面的背鰭鰭條之下, 第二個在與之下些微後面在後部的背鰭鰭條, 第三在而且之下些微地位於脂鰭棘前, 與第四的在尾柄的基底; 所有的鞍狀斑前面地角, 鞍狀斑一與二聯合而且跟腹鰭的基底繼續, 第三與第四的結束在腹部中央碟列的中央。 鰭棘通常顏色淡的超過身體的其餘部分。 斑點相當比較大的在稚魚中。 在所有的鰭上末梢部地稚魚有較少的斑點, 尾鰭的下半部非常深色的。 頭部與後頸形成弓從吻尖到背鰭起點。 體高然後從背鰭起點到背部的前流尾棘漸減增加到尾鰭。 一個圓形的脊從前鼻孔些微前腹的眼窩的前背部角落，鼻孔的流動腹面與終止呈現。 凸起硬骨與略大齒的縱向脊位於在眼窩的背部後方角落的 pterotic-supracleithrum 開始之上而且與眶上的脊接觸。 間隔的空間眼窩凹曲以致於比頭部的中間表面高的眶上的脊。 上枕骨凸狀中間地有輕微的冠。 (參考文獻 58737)
Facultative air-breathing in the genus (Ref. 126274)
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
南美洲: 委內瑞拉。 現在已知來自 Rio Ventuari ，上面 Rio 奧里諾科河的一個支流了, 與 mainstem 在 Amazonas 的在 Puerto Ayacucho 到 Rio Casiquiare 上面的上面奧里諾科河.(參考文獻 58737)
Armbruster, J.W., L.A. Tansey and N.K. Lujan, 2007. Hypostomus rhantos (Siluriformes: Loricariidae), a new species from southern Venezuela. Zootaxa 1553:59-68. (Ref. 58737)
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01585 (0.00723 - 0.03476), b=2.96 (2.79 - 3.13), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
回復力 (Ref.
120179): 高度, 族群倍增時間少於 15個月 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (14 of 100).
