Pseudosuberites youngilensis, Kim & Sim, 2021

Kim, Young A & Sim, Chung Ja, 2021, Ten new species of families Suberitidae and Polymastiidae (Demospongia: Heteroscleromorpha) from Korea, Journal of Species Research 10 (2), pp. 168-183 : 169

publication ID	https://doi.org/ 10.12651/JSR.2021.10.2.168
DOI	https://doi.org/10.5281/zenodo.8142983
persistent identifier	https://treatment.plazi.org/id/8D249234-FFF8-FFDD-0A08-8CADFE4C9FF9
treatment provided by	Felipe
scientific name	Pseudosuberites youngilensis
status	sp. nov.

Treatment

3. Pseudosuberites youngilensis View in CoL n. sp. ( Figs. 3 View Fig , 4 View Fig )

šëffiīfiƎḁḍ (ṳḋ)

Suberites ficus ; Tanita S., 1965: 95-97.

Kim, Rho and Sim, 1968: 40, pl. 2, fig. 9, text-fig. 10. Rho, Kim and Sim, 1969: 156, pl. 2, fig. 7.

Type specimen. Holotype (NIBRIV0000879327), Korea: Yeongilman, Guman-ri, Homigot-myeon , Pohang-si , Gyeongsangbuk-do, 25 July 1967, Rho BJ, by fishing net, deposited in NIBR.

Description. Irregular elliptical mass sponge, size up to 9 × 4.5 × 3 cm. Upper surface with lobate projections and underside smooth with a large hole, 1.5 × 1 cm in diameter. Pagurus pectinatus , a crustacean (hermit crab), resides in the hole. Oscules rare, 0.7-1 mm in diameter. Color in life orange red. Texture firm and compressible.

Skeleton: Small tylostyles and microrhabds arranged tangentially at the surface. Large tylostyles showed at subsurface ( Fig. 3C View Fig ). Mostly small and large tylostrongyles appeared at the underside of the sponge near the hole ( Fig. 4B View Fig ). Numerous microrhabds appear at inside wall of the sponge hole. Spicules. Tylostrongyles, 70- 110-350 × 5-15 μm and tylostyles, 110-340 × 8-10 μm. Microrhabds, 20-35 μm.

Etymology. The species name, youngilensis, is named after the type locality of Youngilman, Gyeongsangbuk-do.

Remarks. This new species is easily distinguished from Suberites ficus Johnston (1842) in shape and spicules. Suberites ficus has a pear shape, surface even, without hole containing hermit crab, and also spicules without microscleres. This new species is not sessile, but independent because no part is attached to the substrate. There is no trace of any kind of shell in and out of the sponge. Tanita (1965) observed that specimens occupied by hermit crabs are very rare, however, most of our specimens contained hermit crabs in the underside hole. Lobate projection of the upper part of sponge is variable, some few large lobes or many small lobes.