Abstract
Five species of Prionospio Malmgren, 1867, each with four pairs of branchiae, are studied from coast of the Iberian Peninsula. Two of these species, Prionospiocristaventralissp. n. and P.paraparisp. n., are new to science, whereas P.caspersi Laubier, 1962, P.fallax Söderström, 1920, and P.ehlersi Fauvel, 1928 have been previously recorded. Prionospiocristaventralissp. n. is characterized by having ventral crests present on chaetigers XI–XIX, dorsal crests and low crests on chaetigers X–XXXIV, triangular neuropodial postchaetal lamellae with pointed ventral edges on chaetiger II, oval neuropodial lamellae on chaetiger III, digitiform pinnules on the posterior face of the first and fourth pairs, and branchial pairs II and III are triangular. Prionospioparaparisp. n. is characterized by having rounded neuropodial postchaetal lamellae on chaetiger I, digitiform pinnules on the posterior face of the first and fourth pairs, branchial pairs II and III are cirriform, low dorsal crests on chaetigers VIII–IX, and oval neuropodial lamellae with enlarged dorsal edges on chaetiger III. A key is given to all Prionospio species with four pairs of branchiae known from the Iberian Peninsula coastline.
Highlights
Prionospio was established by Malmgren (1867) for P. steenstrupi Malmgren, 1867, a spionid species with branchiae on chaetigers II–V, the first and fourth pairs of which are pinnate, and the second and third pairs apinnate
Following the careful comparison between the redescription of P. fallax by Sigvaldadóttir and Mackie (1993), redescription of P. ehlersi by Mackie and Hartley (1990) as well as the original description of P. caspersi, we describe two new species: P. cristaventralis sp. n. and P. parapari sp. n
All material was fixed in 10% formaldehyde in sea water and preserved and stored in 70% ethanol
Summary
Prionospio was established by Malmgren (1867) for P. steenstrupi Malmgren, 1867, a spionid species with branchiae on chaetigers II–V, the first and fourth pairs of which are pinnate, and the second and third pairs apinnate. Neuropodial prechaetal lamellae low in branchial region (Fig. 2F, J), thereafter increasing in size; some specimens with small ventral rounded lobe like extensions of neuropodial prechaetal lamellae on middle chaetigers, rudimentary on posterior chaetigers.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
