Prepare to be amazed by the Antarctic feather stars! Previously thought to be a single species, new research has uncovered a surprising diversity among these fascinating creatures. Using DNA analysis and a closer examination of their complex morphology, scientists have identified a total of eight species within the genus Promachocrinus, four of which were previously unknown.
One of the most intriguing discoveries is the Antarctic strawberry feather star, Promachocrinus fragarius. While it may not share the vibrant red color of its fruity namesake, its body shape is reminiscent enough to inspire its species name.
The feather stars were found at depths ranging from 100 to 1,000 meters below the surface, showcasing their ability to explore the ocean in search of food. These mesmerizing creatures move through the water by gracefully flailing their numerous arms, creating a truly captivating sight.
Interestingly, the assumption that all feather stars have 20 arms has been proven wrong. Some species were found to have only 10 arms, highlighting the importance of this new study in uncovering morphological differences among the samples.
While some species can be identified based on their appearance alone, others require molecular analysis for a definitive classification. The authors of the study emphasize the need for sequencing, particularly COI sequencing, to achieve species-level resolution.
If you’re fascinated by these incredible creatures, you can read the full study in Invertebrate Systematics.
