Home|Search|Identify|Taxonomic tree|Quiz|About this site|Feedback
Developed by ETI BioInformatics
Characteristics, distribution and ecology
Taxonomische classification
Synonyms and common names
Literature references
Images, audio and video
Links to other Web sites

Haeckel, 1887

Shell spherical. Each spicule arising from a pentagonal or hexagonal pit with large ovoid to circular aspinal pores, surrounded by smaller pits. Among latter are 5-6 larger, pentagonal, poreless ones, at vertices of plates, and 5-6 smaller, quadrate, with one sutural pore each. All pits conspicuously framed. Size of sutural pores variable from almost as large as aspinal to half their size. In adult specimens sides and angles of frame crests give rise to thin spines of variable length. Shell diameter (excluding spicules): 0.36-0.58 mm; spicule length: 0.18-0.58 mm; length of spines: 0.08-0.04 mm.

Hystrichaspis dorsata