Guwahati: A new species of crab spider discovered in Manipur and China has highlighted the hidden biodiversity of the Indo–Burma hotspot while also correcting a long-standing scientific misidentification involving a closely related Himalayan species.
The newly described species, Oxytate indosinica, was identified during a spider diversity survey in Manipur and later matched with specimens from Yunnan Province in China, according to a study published in the peer-reviewed journal Far Eastern Entomologist.
The collaborative study involved researchers from Saveetha University and Madras Christian College in Chennai. The discovery emerged from the M.Sc. dissertation work of researcher L.S. Jamgoumin Baite under the guidance of Dr. Anulin Christudhas.
According to the study, the spider belongs to the crab spider genus Oxytate, a group largely distributed across tropical and subtropical Asia.
Researchers noted that the genus prefers vegetation-rich forest habitats and is often collected from foliage and forest canopies.
The Manipur specimen was collected from Churachandpur district at an altitude of around 831 metres in the Indo-Myanmar hill ranges. Researchers said the locality is dominated by humid subtropical evergreen forests interspersed with secondary vegetation.
During examination, taxonomist Dr. John Caleb T.D. found that the specimen did not match any known species. Detailed morphological comparisons revealed that spiders earlier identified in China as Oxytate bhutanica were actually an entirely different species.
The study said Chinese records of O. bhutanica dating back years were misidentifications, and those specimens are now recognised as the newly described O. indosinica. As a result, O. bhutanica is now believed to be restricted to Bhutan, while O. indosinica occurs across Manipur and Yunnan.
Researchers distinguished the new species from O. bhutanica through differences in male and female reproductive structures, including the male palp and female epigyne — key features used in spider taxonomy.
The species name “indosinica” reflects its distribution across India and China within the Indo–Burma biodiversity hotspot.
The study also provides insights into the spider’s ecology. Researchers found that the species occupies a broad elevational range from 556 to 1,841 metres, inhabiting subtropical forests, montane evergreen forests, bamboo groves, plantations, and roadside vegetation. Specimens in China were collected using canopy fogging and sweep sampling, suggesting the spider occupies both arboreal and understory habitats.
The researchers noted that the species appears ecologically adaptable, surviving in both natural forests and disturbed environments across northeastern India and southwestern China.
The discovery adds to a growing number of species being documented from the Indo–Burma hotspot, one of the world’s most biologically rich yet understudied regions.
Researchers said the finding underscores the importance of continued taxonomic studies and field surveys at a time when biodiversity faces increasing threats from habitat loss and climate change.
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