Goniobranchus geometricus (Risbec, 1928)

Mehrotra, Rahul, A. Caballer Gutierrez, Manuel, M. Scott, Chad, Arnold, Spencer, Monchanin, Coline, Viyakarn, Voranop & Chavanich, Suchana, 2021, An updated inventory of sea slugs from Koh Tao, Thailand, with notes on their ecology and a dramatic biodiversity increase for Thai waters, ZooKeys 1042, pp. 73-188 : 73

Goniobranchus geometricus (Risbec, 1928) Figure 10C

Material examined.

One specimen 15 mm, KKR.

Ecology.

Locally rare, known only from the reef edge and soft sediment habitats outside the coral reef. Depth 12-25 m.

Distribution.

Widespread throughout the Indo-Pacific including Myanmar ( Sanpanich and Duangdee 2019), Tanzania, Madagascar, Guam, Japan, Papua New Guinea ( Gosliner et al. 2008), Maldives ( Yonow 1994), Indonesia ( Yonow 2001), Philippines ( Debelius 1996), and Australia ( Nimbs and Smith 2016). Known from both Andaman and Gulf waters of Thailand ( Chavanich et al. 2013).

Figures

Figure 10. A Goniobranchus aureopurpureus 45 mm B Goniobranchus fidelis 12 mm C Goniobranchus geometricus 15 mm (photograph by Kirsty Magson) D, E Goniobranchus sinensis different morphs, 34 mm (D) and 55 mm (E) F Goniobranchus tumuliferus 10 mm G Goniobranchus verrieri 10 mm (photograph by Khumron Waipaka) H Goniobranchus sp. 55 mm (photograph by Phannee Mccarthy) I Hypselodoris cerisae 4 mm J Hypselodoris confetti 24 mm (photograph by Pau Urgell Plaza) K Hypselodoris decorata 18 mm L Hypselodoris infucata 12 mm.