Petta brevis sp. nov., holotype (SAM-A021260) A dorsal view of whole body B ventral view of whole body C ventral view of anterior end D dorsal view of anterior end E close up of left branchiae F dorso-lateral view of posterior end G ventral view of posterior end H close up of scaphal hooks. Abbreviations: af, anal flap (plate); an, anus; br, branchiae; bt, buccal tentacles; cv, cephalic veil; dlp, dorso-lateral pad; dms, dorsal margin of scaphe; lel, lateral ear-shaped lobe; nec, neurochaetae; nep, neuropodium; noc, notochaetae; op, operculum; or, opercular rim; p, paleae; s, segment; sc, scaphe; sh, scaphal hooks; tc, tentacular cirri; vl, ventral lappet.