Entomopsyllus takara, Uyeno & Johnsson, 2018
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publication ID |
https://doi.org/ 10.1080/00222933.2018.1541199 |
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publication LSID |
lsid:zoobank.org:pub:7C8DED0A-9CEB-405D-9BBF-FAF2043B0858 |
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persistent identifier |
https://treatment.plazi.org/id/70920233-F8C7-4618-9A79-2A4B613522CF |
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taxon LSID |
lsid:zoobank.org:act:70920233-F8C7-4618-9A79-2A4B613522CF |
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treatment provided by |
Felipe |
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scientific name |
Entomopsyllus takara |
| status |
sp. nov. |
Entomopsyllus takara sp. nov.
( Figure 3–5 View Figure 3 View Figure 4 View Figure 5 )
Type material
Holotype adult male (NSMT-Cr 25853), ex Heliopora coerulea (Pallas, 1766) (Octocorallia: Helioporacea : Helioporidae ), off Maegomori Port (29°9 ʹ N, 129°11 ʹ E), Takara Island, Tokara Islands, Japan, 10 m depth, 17 September 2015, leg. D. Uyeno. Paratype: 1 adult male
(NSMT-Cr 25854), ex Distichopora violacea (Pallas) ( Hydrozoa: Anthoathecata : Stylasteridae ), locality and date same as that of holotype.
Description of holotype adult male
Body ( Figure 3 View Figure 3 (a)) 1088 long. Prosome 1053 long, comprising cephalothorax and three free thoracic somites. Cephalothorax ( Figure 3 View Figure 3 (a)), wider than long, 647 × 722, flattened dorsoventrally. Second to fourth pedigerous somites ( Figure 3 View Figure 3 (a)) wider
than long; dorsal plate of fourth pedigerous somite covering urosome and caudal rami. Urosome comprising fifth pedigerous somite fused to genital somite and three postgenital somites. Genital somite ( Figure 3 View Figure 3 (b)) wider than long, 174 × 199. Postgenital somites ( Figure 3 View Figure 3 (b)) 3-segmented, 37 × 57, 30 × 56, and 44 × 53, respectively. Caudal rami ( Figure 3 View Figure 3 (b,d)) 6.53 times long than wide, 115 × 18, with six setae and row of spinules on inner margin.
Rostrum absent. Antennule ( Figure 3 View Figure 3 (e)) 13-segmented, armature formula 1, 2, 10, 2, 6, 2, 2, 4, 2, 2, 3, 3 + 1 aesthetasc, and 10; all setae naked. Antenna ( Figure 4 View Figure 4 (a)) composed of coxa, basis, unsegmented exopod, and 2-segmented endopod; coxa and basis unarmed; exopod rod shaped, bearing several rows of hairs and two distal setae; endopod bearing proximal segment with irregular rows of hair and distal segment with terminal claw and five setae. Mandible ( Figure 4 View Figure 4 (b)) biramous, composed of elongate inner stylet (endite) and 2-segmented outer palp bearing two distal setae. Oral cone ( Figure 4 View Figure 4 (c)) elongate and thin. Maxillule ( Figure 4 View Figure 4 (d)) bilobed with inner lobe (endite) bearing three distal setae; outer lobe (palp) indistinctly 2-segmented, bearing 4 setae with patch of spinules on inner margin. Maxilla ( Figure 4 View Figure 4 (e)) 3-segmented, with syncoxa, basis and endopod; syncoxa and basis unarmed; unsegmented endopod forming claw. Maxilliped ( Figure 4 View Figure 4 (f)) 5-segmented, comprising syncoxa, basis, and 3-segmented endopod. Syncoxa bearing minute seta; basis bearing row of spinules; endopod bearing proximal segment with seta, middle segment with three setae, and distal segment with seta and slightly, distally curved claw.
Legs 1 to 3 ( Figures 4 View Figure 4 (g), 5(a–d)) biramous; leg 4 ( Figure 5 View Figure 5 (e,f)) uniramous; both rami bearing 3-segmented rami. Leg armature formula as follows:
Intercoxal sclerites ( Figures 4 View Figure 4 (g), 5(b,d,f)) of legs 1 to 4 unarmed. All setae on both rami plumose. Basis of leg 1 bearing row of hairs close to inner seta and inner protrusion. Rami of legs 1 to 4 bearing rows of spinules on outer margins and hairs on both margins. Endopods of legs 1 to 3 ( Figures 4 View Figure 4 (g), 5(a,c)) bearing pointed posterolateral processes on middle and distal segments. Leg 5 ( Figure 5 View Figure 5 (g)) 2-segmented, protopod fused to pedigerous somite bearing outer seta; exopod rod-like, slightly curved, bearing three setae and row of setules on outer margin. Leg 6 ( Figure 3 View Figure 3 (b,c)) represented by three setae on genital operculum.
Variability
The morphology of the male paratype as in the holotype. The measurements of the body parts (n = 1) are as follows: body length 974; cephalothorax length 593; cephalothorax width 665; prosome length 974; genital somite length 162; genital somite width 187; first urosomite length 25; first urosomite width 51; second urosomite length 25; second urosomite width 56; anal somite length 42; anal somite width 57; caudal ramus length 102; caudal ramus width 18. Caudal ramus 5.69 times longer than wide.
Remarks
To date, four species of Entomopsyllus are known. Two species, E. nichollsi McKinnon, 1988 and E. stocki Kim, 2004 , have a single inner seta on the second endopodal segment of leg 2 ( McKinnon 1988; Kim 2004), and another two congeners, E. adriae ( Eiselt, 1959) and E. brevicaudatus Lee and Kim, 2017 , share two setae with E. takara sp. nov. (see Eiselt 1959; Lee and Kim 2017). The new species differs from E. adriae because it shows a shorter sixth segment of the antennule on the male and the third exopodal segment of leg 4 bearing four setae, while E. adriae has the longer sixth segment of the antennule and the third exopodal segment bearing three setae ( Eiselt 1959). The new species clearly differs from E. brevicaudatus by having the following features: leg 2 bearing the third endopodal segment with five setae, and leg 3 bearing the third exopodal segment with three spines and the third endopodal segment with three setae, while E. brevicaudatus has leg 2 bearing four setae and leg 3 bearing four spines and two setae ( Lee and Kim 2017).
Etymology
The specific name of the new species, ‘ takara ’, refers to the name of an island as type locality in Tokara Islands , Kagoshima, Japan .
Newly established Japanese name
‘Kasabuta-kudakuchi-mijinko-ka’ for the family, ‘Kasabuta-kudakuchi-mijinko-zoku’ for the genus, and ‘Kasabuta-kudakuchi-mijinko’ for the species.
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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