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The Collothecidae (Rotifera, Collothecacea) of Thailand, with the description of a new species and an illustrated key to the Southeast Asian fauna.

Meksuwan P, Pholpunthin P, Segers H - Zookeys (2013)

Bottom Line: A total of 13 species, including two additional infraspecific variants, of Collothecidae are recorded, one of which is described as a new species of Collotheca.We further add taxonomic remarks on some of the taxa on record and illustrate the uncinate trophi of several representatives by scanning electron microscopic images.Finally, we provide illustrated identification keys to the Collothecidae recorded to date from Southeast Asia.

View Article: PubMed Central - PubMed

Affiliation: Plankton Research Unit, Department of Biology, Faculty of Science, Prince of Songkla University, Hat Yai 90112, Songkhla, Thailand.

ABSTRACT
Following previous reports indicating a remarkable high diversity of sessile rotifers in Southeast Asian freshwaters, we report on an extensive study of the diversity of Collothecidae rotifers from fifteen freshwater habitats in Thailand. A total of 13 species, including two additional infraspecific variants, of Collothecidae are recorded, one of which is described as a new species of Collotheca. We further add taxonomic remarks on some of the taxa on record and illustrate the uncinate trophi of several representatives by scanning electron microscopic images. Finally, we provide illustrated identification keys to the Collothecidae recorded to date from Southeast Asia.

No MeSH data available.


Collotheca and Stephanoceros species. ACollotheca stephanochaeta, lateral BCollotheca campanulata f. longicaudata, ventral CCollotheca ornata, dorsal DCollotheca spec., lateral ECollotheca trilobata, lateral FCollotheca tenuilobata, ventral GStephanoceros millsii, lateral HStephanoceros fimbriatus, lateral. Scale bars: B–D = 50 µm, A, E, F = 100 µm, G, H = 250 µm.
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Figure 3: Collotheca and Stephanoceros species. ACollotheca stephanochaeta, lateral BCollotheca campanulata f. longicaudata, ventral CCollotheca ornata, dorsal DCollotheca spec., lateral ECollotheca trilobata, lateral FCollotheca tenuilobata, ventral GStephanoceros millsii, lateral HStephanoceros fimbriatus, lateral. Scale bars: B–D = 50 µm, A, E, F = 100 µm, G, H = 250 µm.

Mentions: We found a single specimen of a species that we could not identify (Fig. 3D). Its corona consists of two lobes, one large dorsal lobe and one minute ventral lobe, which is similar to Collotheca calva (Hudson). The specimen, however, exhibits a unique cluster of long setae dorsally on the tip of the dorsal lobe and, in addition, shows two ring-shaped structures in the infundibulum. The presence of an egg in its gelatinous case indicates that the specimen was mature and not some incompletely developed juvenile. We believe that it represents an undescribed species but refrain from describing and naming it due to the lack of a sufficient number of specimens. The animal occurred in Khlong Lam Chan Non-Hunting Area, Trang province (Fig. 1: S3).


The Collothecidae (Rotifera, Collothecacea) of Thailand, with the description of a new species and an illustrated key to the Southeast Asian fauna.

Meksuwan P, Pholpunthin P, Segers H - Zookeys (2013)

Collotheca and Stephanoceros species. ACollotheca stephanochaeta, lateral BCollotheca campanulata f. longicaudata, ventral CCollotheca ornata, dorsal DCollotheca spec., lateral ECollotheca trilobata, lateral FCollotheca tenuilobata, ventral GStephanoceros millsii, lateral HStephanoceros fimbriatus, lateral. Scale bars: B–D = 50 µm, A, E, F = 100 µm, G, H = 250 µm.
© Copyright Policy - creative-commons-attribution
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3713350&req=5

Figure 3: Collotheca and Stephanoceros species. ACollotheca stephanochaeta, lateral BCollotheca campanulata f. longicaudata, ventral CCollotheca ornata, dorsal DCollotheca spec., lateral ECollotheca trilobata, lateral FCollotheca tenuilobata, ventral GStephanoceros millsii, lateral HStephanoceros fimbriatus, lateral. Scale bars: B–D = 50 µm, A, E, F = 100 µm, G, H = 250 µm.
Mentions: We found a single specimen of a species that we could not identify (Fig. 3D). Its corona consists of two lobes, one large dorsal lobe and one minute ventral lobe, which is similar to Collotheca calva (Hudson). The specimen, however, exhibits a unique cluster of long setae dorsally on the tip of the dorsal lobe and, in addition, shows two ring-shaped structures in the infundibulum. The presence of an egg in its gelatinous case indicates that the specimen was mature and not some incompletely developed juvenile. We believe that it represents an undescribed species but refrain from describing and naming it due to the lack of a sufficient number of specimens. The animal occurred in Khlong Lam Chan Non-Hunting Area, Trang province (Fig. 1: S3).

Bottom Line: A total of 13 species, including two additional infraspecific variants, of Collothecidae are recorded, one of which is described as a new species of Collotheca.We further add taxonomic remarks on some of the taxa on record and illustrate the uncinate trophi of several representatives by scanning electron microscopic images.Finally, we provide illustrated identification keys to the Collothecidae recorded to date from Southeast Asia.

View Article: PubMed Central - PubMed

Affiliation: Plankton Research Unit, Department of Biology, Faculty of Science, Prince of Songkla University, Hat Yai 90112, Songkhla, Thailand.

ABSTRACT
Following previous reports indicating a remarkable high diversity of sessile rotifers in Southeast Asian freshwaters, we report on an extensive study of the diversity of Collothecidae rotifers from fifteen freshwater habitats in Thailand. A total of 13 species, including two additional infraspecific variants, of Collothecidae are recorded, one of which is described as a new species of Collotheca. We further add taxonomic remarks on some of the taxa on record and illustrate the uncinate trophi of several representatives by scanning electron microscopic images. Finally, we provide illustrated identification keys to the Collothecidae recorded to date from Southeast Asia.

No MeSH data available.