Revision of Hesione Savigny in Lamarck, 1818 (Annelida, Errantia, Hesionidae) Author Salazar-Vallejo, Sergio I. text Zoosystema 2018 2018-06-19 40 12 227 325 journal article 10.5252/zoosystema2018v40a12 6c3d39df-7484-4878-8952-9c6a0d926465 1638-9387 3741548 urn:lsid:zoobank.org:pub:6CBF9039-7E4D-4938-909A-2DB5113C8D35 KEY TO SPECIES OF HESIONE SAVIGNY IN LAMARCK, 1818 1. Neuraciculae blackish .................................................................................................................................. 2 — Neuraciculae both pale, colorless; acicular lobes single, tapered; neurochaetal blades very long (6-12 times as long as wide) ........................................................................................................................... H. horsti n. sp. 2. Parapodia with acicular lobe single (lower tine, if present, reduced to a small round lobe; upper tine three or more than four times longer than lower one; see figs 7C, 8C, 10D) ............................................................ 3 — Parapodia with acicular lobe double (of similar length, or upper tine 2-3 times longer than lower one; see Figs 5D , 15C , 18C ); neurochaetal blades bidentate ................................................................................................. 13 3. Neurochaetal blades bidentate ..................................................................................................................... 4 — Neurochaetal blades unidentate (subdistal tooth missing) .......................................................................... 12 4. Neurochaetal blades guards approaching distal tooth ................................................................................... 5 — Neurochaetal blades guards surpassing distal tooth; dorsal cirrophore twice as long as wide (living specimens with dorsal wide homogeneous brownish transverse bands) ....... H. eugeniae Kinberg, 1866 (incl. H. cf. picta ex auct. ) 5. Dorsal surface usually shiny, often areolated; dorsal cirrophore 2-3 times as long as wide (living specimens grayish) .................................................................................................... H. splendida Savigny in Lamarck, 1818 — Dorsal surface opaque; dorsal cirrophore variable (living specimens often with dorsal longitudinal brownish discontinuous bands) .................................................................................................................................. 6 6. Anterior eyes circular ................................................................................................................................... 7 — Anterior eyes as wide as long ..................................................................................................................... 11 — Anterior eyes as long as wide; dorsal surface smooth or with tubercles arranged into longitudinal series, at least along posterior chaetigers ................................................................................................... H. fitzhughi n. sp. 7. Acicular lobes tapered, without basal tine; dorsum rugose to microtuberculated, at least along posterior chaetigers ............................................................................................................................................................. 8 – Acicular lobes digitate, blunt, with a small basal round tine; dorsum smooth to slightly rugose, at least along posterior chaetigers .................................................................................................................................... 10 8. Neurochaetal blades 3-4 times as long as wide (living specimens with middorsal oval to foliose, as long as wide pale areas)................................................................................................. H. intertexta Grube, 1878 restricted — Neurochaetal blades up to 6 times as long as wide......................................................................................... 9 9. Acicular lobe triangular or basally swollen; neurochaetal blades 5-6 times as long as wide (living specimens with discontinuous longitudinal bands, and dorsal segmental, transverse pale, wide bands) .................................... ............................................................................................................... H. ceylonica Grube, 1874 reinstated — Acicular lobe digitate; neurochaetal blades 4-6 times as long as wide (living specimens with continuous longitudinal bands, and discontinuous reddish brown bands alternating with pale areas middorsally)..................... .............................................................................................................................................. H. uchidai n. sp. 10. Parapodial cirri with cirrostyles basally smooth; neurochaetal blades 4-6 times as long as wide ........................ ................................................................................................................ H. praetexta Ehlers, 1887 reinstated — Parapodial cirri with cirrostyles basally swollen; neurochaetal blades 4-5 times as long as wide ....................... .......................................................................................................................................... H. helenensis n. sp. 11. Acicular lobes blunt; subdistal tooth as wide as distal one, guard surpassing subdistal tooth (living specimens with middorsal pale areas) ..................................................................................... H. pantherina Risso, 1826 — Acicular lobes tapered; subdistal tooth thinner than distal one, guard approaching distal tooth (living specimens with middorsal blackish round spots) .......................................... H. panamena Chamberlin, 1919 reinstated 12. Neurochaetal blades guards approaching distal tooth; neurochaetal blades 6-8 times as long as wide .............. ............................................................................................................................................ H. harrisae n. sp. — Neurochaetal blades guards surpassing distal tooth; neurochaetal blades about 15 times as long as wide ......... ........................................................................................................................................... H. osbornae n. sp. 13. Subdistal tooth thinner or smaller than distal tooth ................................................................................... 14 — Subdistal tooth as wide as distal tooth ....................................................................................................... 19 14. Antennae long, 4-6 times as long as wide; neurochaetal blades with guards approaching subdistal tooth (living specimens with dorsal longitudinal brownish bands) ...................................................................................... .......................................... H. sicula delle Chiaje, 1830 reinstated (incl. H. steenstrupi de Quatrefages, 1866 ) — Antennae short, smaller than interocular distance, about 3 times as long as wide ...................................... 15 15. Neurochaetal blades with guards approaching distal tooth ......................................................................... 16 — Neurochaetal blades without guards .......................................................................................................... 18 16. Acicular lobe as long as half chaetal fascicle width (living specimens with irregular transverse brown bands along tentacular segment and chaetigers 1-4 only) .................................................................... H. hartmanae n. sp. — Acicular lobe as long as 1/3 chaetal fascicle width ...................................................................................... 17 17. Dorsum annulated, without longitudinal striae, smooth (living specimens with transverse dark brown bands along the whole body) .................................................................................................................................... ...................... H. picta Müller, 1858 (incl. H. proctochona Schmarda, 1861 and H. margaritae Hansen, 1882 ) — Dorsum annulated and with longitudinal striae, rugose (living specimens with a complex, reticulate pigmentation pattern) ............................................................................................ H. reticulata von Marenzeller, 1879 18. Dorsal cirrophore as long as wide; prostomium rectangular; eyes well-defined (integument thin; living specimens with wide transverse red bands along chaetigers 1-6(7), progressively separated into two bands in following segments) ........................................................................................................................... H. beneliahuae n. sp. — Dorsal cirrophore twice as long as wide; prostomium wider posteriorly; eyes poorly defined (integument thick; pigmentation unknown) ....................................................................................................... H. keablei n. sp. 19. Dorsum of preserved specimens with transverse dark brown bands ........................................................... 20 — Dorsum of preserved specimens colorless; acicular lobe with tines of different length ..................................... ............................................................................................................ H. pacifica McIntosh, 1885 reinstated 20. Wide dark brown transverse band on chaetiger 2; chaetiger 1 mottled or pale; acicular lobe with tines of different length .................................................................................................................................................. 21 — Wide dark brown transverse band on chaetiger 1; chaetiger 2 mottled or pale; acicular lobe with tines of similar length ......................................................................................................... H. genetta Grube, 1864 restricted 21. Longest tentacular cirri reach chaetigers 5-6; dorsal transverse band better defined along anterior margin ...... ............................................................................................................................................. H. paulayi n. sp. — Longest tentacular cirri reach chaetigers 8-9; dorsal transverse band well defined along anterior and posterior margins ............................................................................................................................... H. mooreae n. sp.