Acanthocorbis
Sarcomastigophora (ref. ID; 7368)
- Acanthocorbis apoda (ref. ID; 7368)
- Acanthocorbis camarensis Hara, 1996 (ref. ID; 7368 original paper)
- Acanthocorbis unguiculata (ref. ID; 7368)
Diagnosis
Cells solitary. Protoplast when dried 2.5-3.5 um x 1.5-2.0 um, flagellum ca. 8 um long surrounded by a collar. Lorica obpyriform with waist, consists of anterior projections and lorica chamber, 12-16 um in length. Diameter of the lorica is maximum (6.3-7.3 um) at the anterior projection, ca. 5.3-6.0 um at the first transverse costa and 3.5-4.0 um at the waist. Each of the 10-14 anterior projections consists of two costal strips which connect with the longitudinal costa which is constructed of two costal strips. Lorica chamber consists of anterior and posterior chambers. The anterior chamber is constructed with regularly arranged longitudinal costae and the first transverse costa, which is located at the anterior end of the longitudinal costae. Costal strips overlap greatly at the first transverse costa. Posterior chamber is constructed of more or less disarranged longitudinal costae and many supplemental costal strips. Protoplast is located at the posterior chamber. A waist exists at the boundary of the anterior and the posterior chambers. All the costal strips are narrow rods. (ref. ID; 7368)
Remarks
This new species closely resembles Acanthocorbis unguiculata (Thomsen, 1973) and Acanthocorbis apoda (Leadbeater 1972; Thomsen 1979). Morphological details of the lorica that distinguish these three species are as follows: (1) Regularly arranged longitudinal and transverse costae form open widows at the anterior part of the lorica chambers in A. apoda and A. camarensis n. sp., versus a uniform chamber constructed of more or less disarranged and closely arranged supplemental costal strips, without any clear longitudinal nor transverse costae in A. unguiculata; (2) A. apoda and A. camarensis n. sp. have anterior projections with round apical tips, while A. unguiculata has claw-formed tips; (3) the number of transverse costae in the posterior chamber is more than three in A. unguiculata and A. camarensis n. sp., while A. apoda has one to three transverse costae; and (4) the first and the second transverse costae are separated by less than one longitudinal costal strip in A. camarensis n. sp., while about one and a half longitudinal costal strips separate these two transverse costae in A. apoda, and no clear separation between the first and the second transverse costae is in A. unguiculata. (ref. ID; 7368)
Etymology
The specific name is derived from the Latin camarensis meaning "chamber". (ref. ID; 7368)
Distribution
Coastal waters of Taiwan, Hawaii, and Thailand. (ref. ID; 7368)
Type specimens
Collected from Hawaii (December 1981), deposited in the Herbarium of Miyazaki International College, Miyazaki, Japan, No. 6140. (ref. ID; 7368)