Phyllidiopsis burni Brunckhorst, 1993

Papu, Adelfia, Bogdanov, AleXander, Bara, Robert, Kehraus, Stefan, König, Gabriele M., YonoW, Nathalie & Wägele, Heike, 2022, Phyllidiidae (Nudibranchia, Heterobranchia, Gastropoda): an integrative taxonomic approach including chemical analyses, Organisms Diversity & Evolution (New York, N. Y.) 22 (3), pp. 585-629 : 603

Phyllidiopsis burni Brunckhorst, 1993

Ten specimens are assigned to P. burni (Fig. 7.2a–d), characterised by having an ovate body with a narrow but bright pink band around the mantle margin. The anterior and posterior ends of each animal tend to be slightly pointed. Large pink compound tubercles are present on a black background. Small single pink tubercles lie around the mantle margin. The rhinophores are predominantly black. The black anal opening is generally on the top of a tubercle. The hyponotum is dark grey with pink patches. The foot sole is grey and brighter toward the edge. The colour of our specimens is very similar to the external colouration of Phyllidiella pustulosa ; however, P. burni can be distinguished by its fused oral tentacles typical of the genus Phyllidiopsis . The rectangular oral tentacles are pale white to pink with dark grey grooves on the outer sides.

The extracts of three investigated P. burni specimens (Phpu16Sa19, Fig. 7.2b; Phpu16Sa55, Fig. 7.2d; Phpu16Sa93) revealed various isonitrile sesquiterpenes in LCMS analysis (see Fig. S8b ). While chemotypes of the first two specimens are rather unspecific, the extract of the third specimen was dominated by a unique major sesquiterpene isonitrile with a retention time of 17.1 min that was not encountered in any other chemically investigated phyllidiid .

Figures

Fig.8 Phyllidiopsis species and specimens with identifiers. Scale bars: 1–3 1 mm; 4 10 mm. 1a–d Phyllidiopsis xishaensis: a Phst16Bu1; b Phst16Bu2; c Phsxi18Ba1; d Phsxi18Bu1. 2a–c Phyllidiopsis annae: