Cirsotrema excelsum
Garcia, 2003
Description:
Dimensions range from 18.4 mm - 18.5 mm high and 7.2 mm wide.
Width to height ratio: 0.39:1 ~ 0.39:1
Shell: turreted; solid; small. Exterior colour white. About 11 whorls. Imperforate. Approximately 16 costae on the body whorl. Costae are erect, formed by a series of packed, frilled lamellae. Costae peaked, making a concave shoulder. Intercostal spaces shiny, almost smooth, showing a few, low, inconspicuous spiral cords. Base with basal ridge positioned close to umbilical area. Aperture subcircular, almost surrounded by a heavy labral costa. Operculum unknown.
C. excelsum can be differentiated from Cirsotrema rugosum (Kuroda & Ito, 1961) by its much smaller size; more intricate structure of axial costae; almost smooth interspaces; and near-umbilical position of basal ridge [Garcia, 2003].
Distribution:
Kai Islands, Indonesia
Habitat:
212-221 m
Etymology:
Latin excelsus (adj., meaning lofty, distinguished), referring to the magnificent shape and sculpture of the species., Latin, excelsus = lofty, distinguished., [latin] f rom excelcius = lofty, distinguished. In reference to the magnificent shape and sculpture of the species.
Type Material:
Holotype: MNHN 4190 for Cirsotrema excelsum Garcia, 2003 - Type Locality: KARUBAR station DW 15, Kai Islands, Indonesia, 05o 17'S, 132o 41'E, 212-221 m.. [Brown, L. & Neville, B.D., 2015]
Garcia, E.F. (2003). pp: 13. Fig. 32-33.
Distribution
as listed in source literature
Garcia, E.F. (2003).
Shown in text as Cirsotrema (Cirsotrema) excelsum E. F. García, 2003