Caecomyces sympodialis sp. nov., a new rumen fungus isolated from Bos indicus.
A new anaerobic rumen fungus was isolated from the rumen fluid of a yellow cow (Bos indicus). This fungus appears to be a previously undescribed species of the genus Caecomyces, it possessing uniflagellate zoospores, a spherical holdfast, tubular sporangiophores and bulbous rhizoids. This new fungus also features distinctive multisporangiate thallus sympodially distributed on sporangiophores. The fungus resembles Caecomyces communis and C. equi in that it characterizes bulbous rhizoids and uniflagellate zoospores but differs from C. communis and C. equi in that it possesses multisporangiate and sympodial sporangia. This new fungus and Cyllamyces aberensis both reveal similar morphology during early thallus development in having a spherical holdfast, but they vary from unbranched sporangiophores and additional bulbous rhizoids. In addition, the molecular phylogenetic analyses ITS1 (internal transcribed spacer 1) also conform to the results of the morphological examinations of Caecomyces. For the mentioned reasons, this new species of fungus is described as Caecomyces sympodialis sp. nov. The genera of Neocallimasticaceae and species of Caecomyces are also keyed out.
Institute of Biotechnology, National Pingtung University of Science and Technology, Neipu Hsiang, Pingtung, 91201 Taiwan, ROC.
Yo-Chia
YC
Chen
Sheng-Da
SD
Tsai
Hsueh-Ling
HL
Cheng
Chiu-Yuan
CY
Chien
Chun-Yi
CY
Hu
Tai-Yi
TY
Cheng
D000693:Anaerobiosis; D000818:Animals; D002417:Cattle; D004271:DNA, Fungal / Q000737:chemistry / Q000235:genetics; D004275:DNA, Ribosomal / Q000737:chemistry / Q000235:genetics; D021903:DNA, Ribosomal Spacer / Q000737:chemistry / Q000235:genetics; D008969:Molecular Sequence Data; D020085:Neocallimastigales / Q000145:classification* / Q000166:cytology / Q000235:genetics / Q000302:isolation & purification*; D010802:Phylogeny; D012417:Rumen / Q000382:microbiology*; D017422:Sequence Analysis, DNA; D013172:Spores, Fungal / Q000166:cytology
D004271:DNA, Fungal; D004275:DNA, Ribosomal; D021903:DNA, Ribosomal Spacer