measurementID occurrenceID measurementOfTaxon parentMeasurementID measurementType measurementValue measurementRemarks bibliographicCitation source referenceID 1 Asteroidea TRUE http://purl.obolibrary.org/obo/UBERON_0002104 http://purl.obolibrary.org/obo/IDOMAL_0002229 50–200 ommatidia per eye, each holding several photoreceptors. No lens Garm A, Nilsson D-E. 2014. Visual navigation in starfish: first evidence for the use of vision and eyes in starfish. Proc. R. Soc. B, 281: 20133011. http://dx.doi.org/10.1098/rspb.2013.3011 https://www.researchgate.net/publication/259631333_Visual_navigation_in_starfish_First_evidence_for_the_use_of_vision_and_eyes_in_starfish 2 1 https://eol.org/schema/terms/starts_at 1927 3 1 http://purl.obolibrary.org/obo/PATO_0000140 in the ambulaceral groove, at the tip of each arm 4 Opheodesoma spectabilis TRUE http://purl.obolibrary.org/obo/UBERON_0002104 http://purl.obolibrary.org/obo/UBERON_0000046 Garm A, Nilsson D-E. 2014. Visual navigation in starfish: first evidence for the use of vision and eyes in starfish. Proc. R. Soc. B, 281: 20133011. http://dx.doi.org/10.1098/rspb.2013.3011 https://www.researchgate.net/publication/259631333_Visual_navigation_in_starfish_First_evidence_for_the_use_of_vision_and_eyes_in_starfish Yamamoto