Jasmineira Langerhans, 1880
Jasmineira sp. 4
Voucher specimens. VINSON WEST: station 4MFB.
Diagnosis. Medium sized species; body complete (branchial crown missing), body 13.5 mm long and 1 mm wide; 8 thoracic and 34 abdominal chaetigers (only one specimen collected variation not known); chaetigers somewhat bead-like (constricted) throughout the body, always wider than long, getting crowded posteriorly; colour in alcohol pale pink. Branchial crown missing, typical Jasmineira-like abscission zone not as clear as in other examples of this genus.
Collar is well-developed; of similar height all around, only slightly higher ventrally than dorsally; with smooth anterior margin, and ventrally with an obvious mid-ventral notch; dorsally forming two deep pockets with vascular coils; dorsally not overlapping at midline. Peristomial eyes absent. Narrow glandular ridge around chaetiger 2.
Collar chaetae narrowly-limbate (hooded) arranged in oblique vertical rows. Following thoracic chaetigers with limbate (hooded) superior chaetae, about 8 per fascicle and paleate (mucronate) inferior chaetae with long mucron, about 8 per fascicle. Thoracic neuropodial uncini acicular, with several rows of minute, similar-sized teeth covering half the length of main fang; reducing in number from chaetiger 2 with 19 uncini in a row to 8 in the last thoracic chaetiger. Companion chaetae absent. Abdominal chaetigers with few elongate, narrowly-limbate (hooded) chaetae. Abdominal uncini with reduced breast (S-shaped), elongated; with several rows of similar-sized teeth, occupying half the length of the main fang; about 19 arranged in a single row in chaetiger 9 (first abdominal chaetiger), diminishing number posteriorly.
Posteriomost chaetigers expanded, narrowing abruptly into triangular pygidial lobe with a short terminal cirrus pygidial eyespots not observed. Tube not observed.
Remarks. See Jasminiera page for comparisons of the species found.
