Hesperonoe coreensis, Hong & Lee & Sato, 2017
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publication ID |
https://doi.org/ 10.1080/00222933.2017.1397225 |
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publication LSID |
lsid:zoobank.org:pub:51CB5C5B-0838-48AC-A0BA-8E63AA7628CB |
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persistent identifier |
https://treatment.plazi.org/id/8461872F-4FE7-4738-ADF5-A176EB564A59 |
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taxon LSID |
lsid:zoobank.org:act:8461872F-4FE7-4738-ADF5-A176EB564A59 |
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treatment provided by |
Felipe |
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scientific name |
Hesperonoe coreensis |
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sp. nov. |
Hesperonoe coreensis View in CoL sp. nov.
(New Korean name: Han-guk-ssok-deung-bi-neul-gaet-ji-reong-i)
( Figures 4–6 View Figure 4 View Figure 5 View Figure 6 )
Type material
Holotype ( MABIK-NA 00146033 ). the intertidal mudflats at Jugyo (36°21 ʹ 59”N, 126° 31 ʹ 11”E), Jugyo-ri , Jugyo-myeon, Boryeong-si, Chungcheongnam-do, Korea; 13 July 2013, coll. Jae-Sang Hong, complete specimen 13.4 mm BL, 1.7 mm BWa, 5.9 mm BWb, with 38 segments, deposited in the Marine Biodiversity Institute of Korea, Seocheon, South Korea. GoogleMaps
Paratypes. locality same as holotype, 14 June 2014, coll GoogleMaps . Jae-Sang Hong, 1 specimen ( Figure 6 View Figure 6 , MABIK-NA 00146027 : 18.0 mm BL, 1.7 mm BWa, 5.8 mm BWb, with 38 segments); the intertidal mudflats at Apeojang (37°14 ʹ 34”N, 126°32 ʹ 9”E) in Seonjae-do , Yeongheung-myeon, Ongjin-gun, Incheon, Korea, 28 April 2014, coll GoogleMaps . Jae-Sang Hong, 2 ( MABIK-NA 00146028 : 8.5 mm BL, 1.2mm BWa, 3.9 mm BWb, with 36 segments; MABIK- NA 00146029: 1.1 mm BWa, 3.7 mm BWb); 26 June 2013, coll . Jae-Sang Hong, 1 (MABIK- NA 00146030: 10.8 mm BL, 1.3 mm BWa, 3.9 mm BWb, with 38 segments); 21 September 2013, coll . Jae-Sang Hong, 1 ( MABIK-NA 00146031 : 14.6 mm BL, 2.4 mm BWa, 7.4 mm BWb, with 37 segments); 25 June 2014, coll . Jae-Sang Hong, 1 ( MABIK-NA 00146032 : 14.9 mm BL, 1.6 mm BWa, 4.8 mm BWb, with 37 segments); 23 December 2014, coll . Jae- Sang Hong, 2 ( NIBRIV 0000801054 : 6.9 mm BL, 0.8 mm BWa, 3.1 mm BWb, with 34 segments; NIBRIV 0000801055 : 6.7 mm BL, 0.8 mm BWa, 3.0 mm BWb, with 35 segments) .
Diagnosis
Colour light brown with red in prostomium and ventral body axis in live specimens. Bilobed prostomium with round cephalic peaks. Median antenna with papillae and lateral ones smooth. Presence of 5–10 radial dark-brown ridges in posterior part of elytra. Notochaetae usually present at basal lobes of tentacular cirri. Both of thick and thin notochaetae serrated markedly.
Description
Body dorso-ventrally flattened. Colour light brown with red in prostomium and ventral body axis in live specimens ( Figure 5a–c View Figure 5 ), pale in preserved specimens. Largest complete specimen 18 mm BL, with 38 segments.
Bilobed prostomium slightly broader than long, produced anteriorly into round cephalic peaks ( Figures 5c View Figure 5 , 6a View Figure 6 ). Two pairs of eyes present; anterior pair larger than posterior pair, located near widest point of prostomium; posterior pair closer together. Ceratophore of median antenna large, extending beyond cephalic peaks; style of median antenna long, beyond palps; median antenna with scattered papillae ( Figure 6a, b View Figure 6 ). Lateral antennae short, inserted beneath cephalic peaks; lateral antennae smooth. Median and lateral antennae tapering to filiform tips. Palps about three times prostomium length, tapering to filiform tips, without papillae.
Cirrophores of tentacular cirri large, with digitiform acicular lobe containing single stout aciculum, with zero to three notochaetae denticulate ( Figure 6a, d, e View Figure 6 ). Tentacular cirri tapering beyond end of palps, with more or less dense papillae.
Elytra 15 pairs, on segments 2, 4, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 26, 29 and 32, covering dorsum completely ( Figure 5a, c View Figure 5 ). Each elytron subquadrate in most segments, oval in anterior-most and posterior-most segments, with brown pigmentation except for anterior area ( Figure 5c–e View Figure 5 ). Five to ten radial dark-brown ridges present posterior to attachment scar of elytra ( Figures 5c–e View Figure 5 , 6c View Figure 6 ). Numerous small round microtubercles with dark-brown pigmentation scattered over most of upper surface of elytra. Marginal fringe of filiform papillae present on posterior and outer-lateral edges of elytra ( Figures 5e View Figure 5 , 6c View Figure 6 ).
Parapodia biramous ( Figure 6f View Figure 6 ). Notopodia shorter, with tapering tip. Neuropodia longer, with tapering tip. Dorsal cirri extending beyond chaetae, with long cirrophore, and style with dense long papillae ( Figures 5c View Figure 5 , 6f–h View Figure 6 ). Dorsal tubercles well developed at base of dorsal cirri. Ventral cirri short, tapering to filiform tip, with scattered papillae. Cirrophores of ventral buccal cirri inserted at base of first parapodia (segment 2); styles long, tapering, similar to ventral tentacular cirri, with papillae ( Figure 6b View Figure 6 ).
Two kinds of notochaetae present ( Figure 6i, j View Figure 6 ); superior notochaetae thick, tapering to blunt tip; inferior notochaetae thin, longer, capillary; all notochaetae markedly serrate. Two kinds of neurochaetae present ( Figure 6k, l View Figure 6 ); upper neurochaetae slender, with long spinous region tapering to fine tip; lower neurochaetae thicker and shorter, with expanded subdistal shorter spinous region, and smooth, sharp tip; intermediate form of neurochaetae present in middle position.
Etymology
The species name is an adjective derived from the Latin name for the country of the type locality, Korea: Coree.
Geographic distribution
Endemic to the Korean coast of Yellow Sea ( Figure 4 View Figure 4 ).
Habitat
This species commonly inhabited the upper intertidal zone of sandy-mud tidal flats,
coexisting with H. hwanghaiensis . Their habitats were densely inhabited by the burrowing mud shrimp U. major (maximum 312 individuals/m 2 in April 2013 at Apeojang,
Seonjae-do) ( Hong 2013, 2014). Therefore, we inferred that H. coreensis sp. nov. is commensal with U. major , like H. hwanghaiensis .
Remarks
This species is easily distinguishable from all other species of Hesperonoe due to a unique characteristic: the presence of several radial dark-brown ridges in posterior part of elytra. Hesperonoe coreensis also has round cephalic peaks of the prostomium, in contrast to tapering ones in two other Asian congeners.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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