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Astrodia duospina Xie, Lu, Pang & Zhang, 2022
In the Philippine Sea, on the ridge of the Kyushu-Palau Ridge, and on the Nazimov Guyot and Caliwei Guyot submarine mountains in the western Pacific, several specimens of a five-armed brittle star were discovered at very great depths using an ROV.
The head disk is pentagonal with notched interradial edges, 14 mm in diameter, 4.7 mm high. The aboral surface is nearly flat and slightly depressed in the middle, completely covered with thickened skin, with plate-like external ossicles in the middle
The five long and slender are about eight to nine times the disc diameter.
The arms gradually taper toward the tip, arm spines are present only on the ventral side.
Outer arm spines on proximal segments slightly shorter than inner ones, but only three-fifths as long as inner spines on middle and distal segments
Color: pinkish
Etymology:
The species name "duo" is derived from the Latin numeral word for two and the Latin noun "spina" for spine, referring to the presence of no more than two arm spines on the entire arm.
Literature reference:
Xie X, Lu B, Pang J, Zhang D (2022)
Description of two species of the genus Astrodia Verrill, 1899 (Ophiuroidea, Euryalida, Asteronychidae), including a new species from seamounts in the West Pacific.
ZooKeys 1123: 99-122. https://doi.org/10.3897/zookeys.1123.87397
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
In the Philippine Sea, on the ridge of the Kyushu-Palau Ridge, and on the Nazimov Guyot and Caliwei Guyot submarine mountains in the western Pacific, several specimens of a five-armed brittle star were discovered at very great depths using an ROV.
The head disk is pentagonal with notched interradial edges, 14 mm in diameter, 4.7 mm high. The aboral surface is nearly flat and slightly depressed in the middle, completely covered with thickened skin, with plate-like external ossicles in the middle
The five long and slender are about eight to nine times the disc diameter.
The arms gradually taper toward the tip, arm spines are present only on the ventral side.
Outer arm spines on proximal segments slightly shorter than inner ones, but only three-fifths as long as inner spines on middle and distal segments
Color: pinkish
Etymology:
The species name "duo" is derived from the Latin numeral word for two and the Latin noun "spina" for spine, referring to the presence of no more than two arm spines on the entire arm.
Literature reference:
Xie X, Lu B, Pang J, Zhang D (2022)
Description of two species of the genus Astrodia Verrill, 1899 (Ophiuroidea, Euryalida, Asteronychidae), including a new species from seamounts in the West Pacific.
ZooKeys 1123: 99-122. https://doi.org/10.3897/zookeys.1123.87397
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
