| 词条 | Megalancistrus |
| 释义 |
| taxon = Megalancistrus | authority = Isbrücker, 1980 | type_species = Chaetostomus gigas | type_species_authority = Boulenger, 1895 | subdivision_ranks = Species | subdivision = }} Megalancistrus is a genus of large suckermouth armored catfishes native to South America. SpeciesThere are currently two recognized species in this genus:[1]
DistributionThe genus Megalancistrus are found in the Río de la Plata and São Francisco River basins.[1] DescriptionMegalancistrus species are large and spiny and generally have 10 dorsal-fin rays. The color on the sides and the abdomen is dark brown with very large spots on the head, sides, and fins or with light vermicualtions. The abdomen is completely plated in adults. The caudal fin is forked, but without filaments. Cheek odontodes, as in Acanthicus, are thin but numerous. The plates on the body are well keeled with rows of odontodes above and below the keel rows incomplete in specimens up to at least {{convert|20|cm|in|abbr=on}}.[2]EcologyMegalancistrus species are live in large rivers. These fish eat freshwater sponges and probably other invertebrates. They have been found with a lot of wood in the gut, but it appears as if this was consumed accidentally.[2]References1. ^1 {{FishBase genus | genus = Megalancistrus| month = December | year = 2011}} {{Taxonbar|from=Q5014350}}{{Loricariidae-stub}}2. ^1 {{cite web|url=http://www.auburn.edu/academic/science_math/res_area/loricariid/fish_key/Acanth/Mega.html|title=Megalancistrus Isbrücker, 1980|first=Jonathan W.|last=Armbruster|accessdate=2007-07-21}} 6 : Ancistrini|Fish of South America|Fauna of the Amazon|Fauna of Brazil|Catfish genera|Taxa named by Isaäc J. H. Isbrücker |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。