New species and records of deep-water Orbiniidae (Annelida, Polychaeta) from the Eastern Pacific continental slope, abyssal Pacific Ocean, and the South China Sea
Blake, James A.
Zootaxa
2020
2020-02-03
4730
1
1
61
84PL5
Day
1977
[513,686,969,996]
Polychaeta
Orbiniidae
Leitoscoloplos
Animalia
5
6
Annelida
genus
1A. Branchiae first present from a posterior thoracic setiger....................................................... 2 1B. Branchiae first present from an anterior abdominal setiger..................................................... 3 2A. With 12 thoracic setigers; branchiae from setiger 10; abdominal neuropodium with rounded tip and short ventral cirrus, subpodial flange absent; abdominal notopodia elongate, tapering to narrow tip; branchiae symmetrical, typically triangular, tapering to papillate tip................................................................. Leitoscoloplos sahlingi n. sp. 2B. With 14 thoracic setigers; branchiae from setigers 11–12; abdominal neuropodium with bi-lobed tip; subpodial flange present; abdominal notopodia elongate, with subdistal swelling; branchiae asymmetrical.. Leitoscoloplos mexicanus( Fauchald, 1972) 3A. Pre-setiger region long, narrow, triangular, longer than wide................................................... 4 3B. Pre-setiger region short, as wide as or wider than long........................................................ 5 4A. Furcate setae present; branchiae from setiger 15–16; thoracic noto- and neuropodial postsetal lamellae short, triangular, tapering, arising from low base; abdominal neuropodia without subpodial flange................. Leitoscoloplos cliffordi n. sp. 4B Furcate setae absent; branchiae from setiger 17–18; thoracic noto- and neuropodial postsetal lamellae long, digitiform, arising from broadly rounded base; abdominal neuropodia with protruding subpodial flange....... Leitoscoloplos williamsae n. sp. 5A. Prostomium distinctly separated from peristomium by groove; branchiae elongate, smooth, triangular, tapering to narrow tip ................................................................................................... 6 5B. Prostomium merging posteriorly with peristomium; branchiae short, thick, with glandular appearance........................................................................... Leitoscoloplos pachybranchiatus Blake & Hilbig, 1990 6A Thoracic notopodial postsetal lamellae triangular; abdominal neuropodia with blunt tip with two weakly developed lobes, ventral cirrus absent; subpodial flange absent......................................... Leitoscoloplos gordaensis n. sp. 6B. Thoracic notopodial postsetal lamellae elongate, digitiform, arising from swollen base; abdominal neuropodia with rounded tip and subterminal ventral cirrus; subpodial flange present................................ Leitoscoloplos lunulus n. sp.