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New Freshwater crab species discovered in Chinese Fish market by Researchers

Being a primarily aquatic species, the new crab prefers the pools of limestone hill streams, therefore its name Yuebeipotamon calciatile, where calciatile means 'living on limestone'

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Source:Wikimedia commons

BEIJING, September 8, 2016: An examination of the ornamental fish market in southern China has led to the discovery of a new species and even a new genus of freshwater crab, researchers have reported.

Knowing about the growing demand for eye-catching freshwater crabs from southern China, the authors took a look at the ornamental fish market to eventually identify an individual with unusually structured male gonopod, which in crustaceans is a swimming appendage modified to serve as a reproductive organ.

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Despite the superficial resemblance to an already existing freshwater crab genus, at second glance, the crab turned out to be quite distinct thanks to a unique set of features including the carapace, the monopod and the relatively long and slender legs.
Once the molecular analyses’ results were also in, the authors had enough evidence to assign the freshwater crab as a species and even a genus new to science.

Being a primarily aquatic species, the new crab prefers the pools of limestone hill streams, therefore its name Yuebeipotamon calciatile, where calciatile means ‘living on limestone’.

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To adapt to the habitat, the species seems to have developed its characteristic slender legs, which make it easier for the crab to climb and move around whenever the short-lived limestone hill streams make it search for a new home, the researchers reported in the journal ZooKeys.

The carapace of the new crab is usually coloured in maroon to dark brown, while the claws and legs are reddish to purplish, the study said. (IANS)

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The Launch Countdown For DRDO’s Satellite To Start Soon

The Kalamsat is a 10cm cube nano-satellite weighing about 1.2kg. The satellite's life span is about two months and its cost is about Rs 12 lakh

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Nirbhay
The Defence Research and Development Organisation (DRDO) sources said the Nirbhay missile test was "successful".(Representative image) VOA

The countdown for the flight Thursday night of an Indian rocket carrying the Microsat R imaging satellite of the Defence Research and Development Organisation (DRDO) and the Kalamsat student satellite will begin later on Wednesday, an Indian space agency official said.

“The countdown for the PSLV (Polar Satellite Launch Vehicle) rocket launch will start today (Wednesday).

“The countdown duration and its starting time, the time of rocket launch would be announced later,” an official of the Indian Space Research Organisation (ISRO) told IANS.

The rocket launch was expected to happen at about 11.40 p.m. on Thursday.

“We will be launching the 700-kg Microsat R and Kalamsat with a new PSLV variant.

OSIRIS-REx, NASA, Asteroid bennu
Satellite To Conduct Biological Experiments In Space, Plans Space Kidz India, VOA

“To reduce weight and increase the mass, an aluminium tank is being used for the first time in the fourth stage,” ISRO Chairman K. Sivan had told IANS earlier.

He said Kalamsat is a payload developed by students and Chennai-based Space Kidz India.

The PSLV is a four-stage engine expendable rocket with alternating solid and liquid fuel.

In its normal configuration, the rocket would have six strap-on motors hugging the its first stage. However, the PSLV that would be flying on January 24 with Microsat R and Kalamsat will be a two strap-on motors configuration and is designated as PSLV-DL.

The rocket PSLV-C44 is the first mission of PSLV-DL and is a new variant.

PSLV
Indian rocket Polar Satellite Launch Vehicle (PSLV) lifts off with two British satellites NovaSAR and S1-4, as seen from Chennai. IANS

About 14 minutes into the flight the rocket would eject Microsat R at an altitude of about 277km. This would start functioning at an altitude of 450km in about the 103th minute after lift-off.

The Kalamsat would be the first to use the rocket’s fourth stage as an orbital platform. The fourth stage would be moved to higher circular orbit so as to establish an orbital platform for carrying out experiments, ISRO had said.

Also Read: DRDO Develops Ayurvedic Medicine For Vitiligo

“The Kalamsat is a 10cm cube nano-satellite weighing about 1.2kg. The satellite’s life span is about two months and its cost is about Rs 12 lakh,” Srimathy Kesan, Founder-CEO of Space Kidz India, told IANS.

Space Kidz India is working towards promoting art, science and culture for students in India.

According to Kesan, Kalamsat will be the first satellite of Space Kidz India to be in a proper orbit as its earlier satellites were suborbital ones. (IANS)