Two new marine sponges,
Marine sponges of the family Halichondriidae Gray, 1867 have an irregular choanosomal skeleton consisting of a high density of spicules arranged in confusing, vague, ill-defined,directionless tracts and spicules (Hooper et al., 1997). Finding conspicuous anatomical characteristics of the genus
Sponges were collected from Uljin-gun, Gyeongsangbuk-do, Korea by SCUBA diving during 2007. Specimens were fixed in 95% or 99.9% ethanol. Spicules were observed under a light microscope (Carl Zeiss Axioskop II; Carl Zeiss, Jena, Germany). Identification was made on the basis of external features of sponges, growth form, skeletal structure, and spicule size and form. For observation of the endosomal skeletal structure, thin free-hand sections were made with specimens hardened in alcohol using a surgical blade. Spicules were prepared by dissolving a piece of sponge in sodium hypochlorite and examined under an scanning electron microscopy (Rutzler, 1978; Hooper, 1996). Holotypes of two new species have been deposited in the Department of Biological Sciences, Hannam University, Daejeon, Korea.
Phylum Porifera Grant, 1836
Class Demospongiae Sollas, 1885
Order Halichondrida Gray, 1867
Family Halichondriidae Gray, 1867
1*Halichondria jangseungenesis n. sp.
Kang and Sim, 2011 (Fig. 1)
Holotype (Por. 104), Uljin-gun, Gyeongsangbuk-do, 1 Apr 2007, SCUBA 25 m depth, by Lee JR, deposited in the Department of Biological Sciences, Hannam University, Daejeon, Korea.
Encrusting with chimney. Sized up to 4×3 cm wide and 0.2 cm thick. Oscules, 0.2-0.5 cm in diameter, opened at top of chimney. Osuclar chimney, characteristically grooved. Colour orange in life and gradually changed to ivory in alcohol. Texture Firm and compressible. Surface smooth. Ectosomal skeleton tangential arrangement and intercrossing bundles of spicule. Choanosomal skeleton composed of many spicular tracts and individual spicules scatter-
ed whole body in confusion. Spicules composed of one type of oxea without microscleres. Oxea approximately 215-290×5-7.5 ㎛ in size.
The species is named after the type locality, Janseungbaegi, Uljin-gun, Korea.
1*Halichondria nagokenesis n. sp.
Kang and Sim, 2011 (Fig. 2)
Holotype (Por. 105), Uljin-gun, Gyeongsangbuk-do, Korea, 1 Aug 2007, SCUBA 20 m depth, by Lee JR, deposited in the Department of Biological Sciences, Hannam University, Daejeon, Korea.
Thick encrusting with numerous erect hollow cylindrical tube, 2.5-5 cm high. Sized up to 8×5 cm wide and 1.5 cm thick. Oscules, 0.3-0.5 cm in diameter, opened at top of each tube. Color ivory in ethyl alcohol. Texture soft. Surface smooth. Ectosomal skeleton tangential arrangement. Choanosomal skeleton large and extensive subchoanosomal space present, irregular and large-meshed net of spicuels, columns with spicules extend to surface and supporting ectosomal skeleton. Spicules composed of one type of oxea without microscleres.
Oxea approximately 500-670×10-15 ㎛ in size.
The species is named after the type locality, Nagok, Uljin-gun, Korea.
Korean name: 1*장승해변해면(신칭) Korean name: 1*나곡해변해면