Hypselodoris roo

Hypselodoris roo is a species of sea slug or dorid nudibranch, a marine gastropod mollusc in the family Chromodorididae.[2]

Hypselodoris roo
Tulamben, Bali
Lembeh, Indonesia
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Heterobranchia
Order: Nudibranchia
Suborder: Doridina
Superfamily: Doridoidea
Family: Chromodorididae
Genus: Hypselodoris
Species:
H. roo
Binomial name
Hypselodoris roo
Gosliner & Johnson, 2018[1]

Distribution

This nudibranch was described from Mainit Bubbles, Calumpan Peninsula, Mabini, Batangas, Luzon, Philippines, 13.68802°N 120.95809°E / 13.68802; 120.95809. It is also reported from Indonesia.

Description

Hypselodoris roo has frequently been mistaken for Hypselodoris kanga. It has a white body covered with large yellow spots and smaller blue-black spots. The dark blue spots at the edge of the mantle have a diffuse halo of bright blue around them. The gills have lines on the outer edges which are orange-red and a flattened area between with opaque white spots. The rhinophores have bright red clubs and red bases. Hypselodoris confetti is almost identical to this species, but with yellow spots on the outer gill faces which are edged with lines which grade from blue-purple at the base to red at the tips.[1]

This species can reach a total length of at least 45 mm.[1]

gollark: Also, to help with sleep monitoring, it will ship with an optional EEG headset.
gollark: A what? No, this is the osmarksßßsmartwatch™.
gollark: Anyway, the osmarksßßsmartwatch™ will also incorporate the latest sensor technology, like an accelerometer, a compass for some reason also, a thermometer, a barometer, a humidity sensor, a light level/UV/IR sensor, an ultrasonic distance sensor, a regular microphone, an irregular microphone, lidar, radar, an infrared thing, two incompatible software defined radios, that one weird IC some company made for some reason to detect lightning strikes nearby, a spectrometer, LEDs abused as photodetectors, a DVD player (DVDs must be shrunken or trimmed before use), a portable DNA sequencer, a multi-axis Hall effect sensor, phased array satellite transceivers, atmospheric bismuth concentration meters, an apiometer, a mouse trackball, an optical mouse (miniaturized), a full 22-key keyboard, 3 dedicated hardware buttons, a fan noise detector and estimator, and a blood oxygen concentration reader.
gollark: We'll send them cardboard models.
gollark: Instead of traditional OLED or LCD displays, it will aim lasers directly into your retinas.

References
  1. Epstein, H. E.; Hallas, J. M.; Johnson, R. F.; Lopez, A.; Gosliner, T. M. (2018). Reading between the lines: revealing cryptic species diversity and colour patterns in Hypselodoris nudibranchs (Mollusca: Heterobranchia: Chromodorididae). Zoological Journal of the Linnean Society. 2018, XX, 1–74. With 40 figures.
  2. MolluscaBase (2018). Hypselodoris roo Gosliner & Johnson, 2018. Accessed through: World Register of Marine Species on 2018-09-25.
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