A New Species of the Genus Tetilla (Spirophorida: Tetillidae) from Korea
- Author: Shim Eun Jung, Sim Chung Ja
- Organization: Shim Eun Jung; Sim Chung Ja
- Publish: Animal Systematics, Evolution and Diversity Volume 27, Issue1, p101~103, 31 March 2011
A new species in the genus
Tetilla, Tetilla hwasunensisn. sp. was collected from Hwasun Harbor, Jejudo Island in 2009. This species differs from T. sericaits lack of spherules and from T. radiateby having sigmaspires. Description and figures of the new species are provided.
Spirophorida , Tetilla , new species , Jejudo Island
TetillaSchmidt, 1868 is differentiated from other genera belonging to Tetillidae by a lack of porocalices and distinct cortex consisting of collagen fibers and special cortical megascleres. Approximately 50 species of Tetillafrom all parts of the world’s ocean have been described (Hooper and van Soest, 2002). Three species of Tetillafrom Korean waters have been reported: T. ovate, T. australisand T. koreana(Thiele, 1898; Bergquist, 1968; Rho and Sim, 1981). Specimens examined in this study were collected during SCUBA diving at a depth of 5m from Hwasun Harbor, Jejudo Island, Korea. All procedures follow the methods of Rutzler (1978). Type specimens are deposited in the Natural History Museum, Hannam University (HUNHM).
Phylum Porifera Grant, 1836
Class Demospongiae Sollas, 1885
Subclass Tetractinomorpha Levi, 1953
Order Spirophorida Bergquist and Hogg, 1969
Family Tetillidae Sollas, 1886
Tetilla hwasunensisn. sp. (Figs. 1, 2)
Holotype (Por. 104), Hwasun Harbor, Jejudo Island, 2 Sep 2009, Kim SH, by SCUBA diving, at 5 m in depth, HUNHM. Paratype (Por. 104-1), collected with Holotype, HUNHM.
Globular shape with one root-like base consisting of spicules and sand, size up to 4.3×3.5×1 cm. A single oscule 5 mm in diameter, opened at center of body. Colour pink in life, beige in ethanol. Texture very compressible. Surface of body even and smooth. Skeletal structure showing radial arrangement without distinct cortex. Bundles of oxeas run from basement to the surface. Surface region densely packed with oxeas and small protriaenes in fence-like structure. Lower part of body with less spongin. Root in base with dense anatriaenes and large protriaenes mixed with sand.
Spicules. Oxeas straight or slightly curved. Anatriaenes very long and curved at tip. Protriaenes long and thin, it’s clad unequally long. Sigmaspires with fine spines.
Large protriaenes？？？？？？？？？？？？？？？？？？？？？rhabds 1,800-2,050×4-7
Small protriaenes ？？？？？？？？？？？？？？？？？？？？？？？？？？rhabds 250-660×1-2
The species is named after the type locality, Hwasun Harbor, Jejudo Island.
T. hwasunensisn. sp. is similar to both T. sericacollected from Japan (Lebwohl, 1914) and T. radiatefrom Brazil (Selenka, 1879) in globular shape and radial skeletal structure; however, this species is easily distinguished from T. sericaby a lack of spherules as microscleres. And the new species has sigmaspires; however, T. radiatedoesn’t have spicules. T. australis, reported in Korea (Rho and Sim, 1981), are covered with neumerous conules on the surface, whereas
the new species has an even surface.
Korean name: 1*화순유두해면 (신칭)
[Fig. 1.] Tetilla hwasunensis n. sp. A Holotype; B Sponge in situ; C Skeletal structure; D Oxea (arrow); E Clad of anatriaene; FClad of large protriaene. Scale bars: A=1 cm C=1 mm D=100 ㎛ F=30 ㎛ E=20 ㎛.
[Fig. 2.] Tetilla hwasunensis n. sp. A B Clads of small protriaenes; C D Sigmaspires. Scale bars: A B=50 ㎛ C D= 5 ㎛