Biodiversity data and new species descriptions of polychaetes from offshore waters of the Falkland Islands, an area undergoing hydrocarbon exploration Author Neal, Lenka Natural History Museum, London, UK l.nealova@nhm.ac.uk Author Paterson, Gordon L. J. Natural History Museum, London, UK Author Blockley, David Greenland Institute of Natural Resources, Nuuk, Greenland https://orcid.org/0000-0002-6368-1101 Author Scott, Ben Natural History Museum, London, UK https://orcid.org/0000-0002-5590-7174 Author Sherlock, Emma Natural History Museum, London, UK Author Huque, Cate Natural History Museum, London, UK Author Glover, Adrian G. Natural History Museum, London, UK text ZooKeys 2020 938 1 86 http://dx.doi.org/10.3897/zookeys.938.49349 journal article http://dx.doi.org/10.3897/zookeys.938.49349 1313-2970-938-1 76B7FF03FEB14884AD2955BE864F0EBF A7E05382096E5182BD65560002045C47

Table 2. Comparison of Leitoscoloplos olei sp. nov. with species known from the region based on literature (Mackie 1987, Blake 2017). An asterisk indicates that only the diagnosis given by Mackie (1987) is considered valid here.

Species	Prostomium	Thorax (no. of chaetigers)	Branchiae (from chaetiger)	Thoracic neuropodial postchaetal lobes (form)	Abdominal notopodial postchaetal lobes (form)	Subpodial flange
L. kerguelensis *	conical, anteriorly slightly rounded	9-10	13-14 (15)	triangular	slender, digitate	rudimentary
L. abranchiatus	conical, narrowly rounded	9-13	absent	short, conical	short, digitate	absent? (not reported)
L. mawsoni	conical, anteriorly rounded	10	11-12, symmetrical	robust, triangular, digitate	robust, triangular to digitate	initially rudimentary, enlarged blister-like in posterior chaetigers
L. geminus	conical, anteriorly rounded	10	11-12, distinctly asymmetrical in posterior chaetigers	approaching oval shape	wide basally, tapering to elongate narrow tip	Initially rudi-mentary, sepa-rated from neuropodium by a distinct notch; enlarged blister-like flanges in posterior chaetigers
L. banzareae *	conical, anteriorly slightly rounded	10	14-15	slender, triangular, digitate*	slender, digitate- lanceolate	narrow
L. chilensis	conical, anteriorly sharp	13-16	13-16	mammiform- triangular	foliaceous	well- developed
L. drakei	conical, narrowing anteriorly	8-9	18-20	short, stubby, indistinct	elongated and cirriform to narrower and digitiform	absent? (not reported)
L. eltaninae	conical, anteriorly sharp	10	20	tapering digitiform	becoming bilobed	absent? (not reported)
L. nasus	elongate, more than twice as long as wide; anteriorly narrowly rounded	9-10	13-14	triangular	elongate, becoming narrow more posteriorly	present
L. phyllobran-chus	reduced, wider than long, weakly pointed anteriorly	8	17	elliptical	thin, cirriform	neuropodia of middle and posterior segments dorsoventrally swollen, forming weakly developed ventral flange
L. plataensis	short, conical, pointed, and narrow	9-10	13-16, asymmetrical, with lateral lobe	mammiform	thin, narrow, digitate	small but distinct, continuous with neuropodial lobe
L. rankini	conical, anteriorly pointed	9-11	from anterior abdominal segments	arising from low postchaetal ridge	narrow, digitiform	reported as absent
L. olei sp. nov.	conical, anteriorly pointed	9	17-18, asymmetrical, with ventral lobe	conical to approaching mammiform in posterior thorax	slender, digitate	distinct, continuous with neuropodial lobe