Thouarella (Euthouarella) hilgendorfi (Studer, 1878)

Fig. 1X

Plumarella hilgendorfi Studer, 1878: 648 –649, pl. 2, figs. 15a–e.

Thouarella hilgendorfi: Versluys, 1906: 24 –29, pl. 2, fig. 7.—Taylor, et al., 2013: 76–77 (synonymy, but no illustrations, Group 2).—Taylor & Roger, 2015: 193.

Thouarella (Euthouarella) hilgendorfi: Cairns & Bayer, 2009: 28 .— Cairns, 2010: 417 –422, pl. 2, figs. 1D, 4–5 (complete synonymy and description).

Type and Type Locality. The holotype is deposited in the Zoologisches Museum, Berlin (2070). Type Locality: Tokyo Bay, 548 m.

Material Examined. EX 1605-L1-17, 16.134˚N, 146.082˚E (northern Mariana Islands), 284 m, 8 May 2016, image only.

Remarks. This species was adequately described and figured by Cairns (2010) and is only known from images (no collected specimens) in this report, and thus will not be fully redescribed or figured herein. Cairns & Wirshing (2018) recently resurrected the subgenus Euthouarella for those species having their polyps arranged in pairs or whorls.

Distribution. A widespread species, occurring throughout the Indo-West Pacific and central Pacific, 164– 750 m.

Callogorgia cracentis, n. sp.

Calyptrophora lyra, n. sp.

* Calyptrophora diaphana Cairns, 2012

Calyptrophora carinata, n. sp.

* Calyptrophora clarki Bayer, 1951

Calyptrophora pourtalesi, n. sp.

Calyptrophora distolos n. sp.

* * Candidella gigantea (Wright & Studer, 1889)

Macroprimnoa ornata, n. gen., n. sp.

Narella ferula, n. sp.

* Narella hawaiiensis Cairns & Bayer, 2007

* Narella macrocalyx Cairns & Bayer, 2007

Narella merga, n. sp.

Narella fordi, n. sp.

Narella virgosa, n. sp.

Narella calamus, n. sp.

Narella horrida (Versluys, 1906)

Narella aurantiaca, n. sp.

* Paracalyptrophora hawaiiensis Cairns, 2009

* Paracalyptrophora echinata Cairns, 2009

Paracalyptrophora spiralis, n. sp.

* Plumarella circumoperculum Cairns, 2010

** Thouarella hilgendorfi (Studer, 1878)