File:Cantopotamon zhuaiense (39806430302).jpg
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[edit]DescriptionCantopotamon zhuaiense (39806430302).jpg |
UPDATE: After reading the recently published article about the new freshwater crab genus Cantopotamon, the crabs I found are certainly Cantopotamon zhuhaiense, described from the exact locality where I found them. Here is the link to this article: <a href="http://zoolstud.sinica.edu.tw/Journals/56/56-41.pdf" rel="noreferrer nofollow">zoolstud.sinica.edu.tw/Journals/56/56-41.pdf</a> The crabs were found in fast to slow-flowing hill streams on altitudes between 50 and 300 meters above sea level. They hide under stones and were occasionally observed leaving the water and climbing rock. At no site C. zhuhaiense was seen thriving sympatrically with the other Potamid I saw, Nanhaipotamon guangdongense, althuogh in the original description, they were observed living in the same habitat as Nanhaipotamon zhuhaiense and N. guangdongense. Nevertheless, N. guangdongense was present in very small to small, more slow-flowing streams with sandy, muddy, or clay bottom, whereas C. zhuhaiense was found in broader, fast-flowing streams on gravel or sandy bottom. Zhuhai, Guangdong Fromer Text: The freshwater crab genus Candidiopotamon is to date only known from Taiwan and the Ryukyu Islands. The species described from Guangdong province by Dai, 1999 is now considered a synonym of C. rathbunae from Taiwan (See Shih & Ng, 2011). Nevertheless, I found a few specimens resembeling no other Potamids from Guangdong province that I am aware of, but bear similarity to C. rathbunae. For no better name, the specimes are labeled C. cf. guangdongense. It is possible that there is a population of C. rathbunae or a new unknown species in Guangdong. Perhaps, the crabs I found belong to yet another species described by a single or few specimens from unknown localities in Guangdong, as Yarepotamon guangdongense. The only dorsal image of Y. guangdongense I was able to find is in black and white and really small, and as I did not take an image of the male Gonopod or Maxilliped 3, there is no way to finally determine the status of the photographed specimen (link to the article here: <a href="https://lkcnhm.nus.edu.sg/app/uploads/2017/06/45rbz237-264.pdf" rel="noreferrer nofollow">lkcnhm.nus.edu.sg/app/uploads/2017/06/45rbz237-264.pdf</a>). |
Date | |
Source | Cantopotamon zhuaiense |
Author | Nature.Catcher |
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This image was originally posted to Flickr by Nature.Catcher at https://flickr.com/photos/96826734@N08/39806430302. It was reviewed on 11 May 2021 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-sa-2.0. |
11 May 2021
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Camera manufacturer | Canon |
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Exposure time | 1/80 sec (0.0125) |
F-number | f/5.6 |
ISO speed rating | 640 |
Date and time of data generation | 05:04, 24 September 2017 |
Lens focal length | 55 mm |
Orientation | Normal |
Horizontal resolution | 72 dpi |
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File change date and time | 17:00, 22 January 2018 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.3 |
Date and time of digitizing | 05:04, 24 September 2017 |
Meaning of each component |
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APEX aperture | 5 |
APEX exposure bias | 0 |
Metering mode | Pattern |
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