Bodotria ( Atlantobodotria ) incarinata, Kim & Lee & Kim, 2020

Bodotria ( Atlantobodotria) incarinata sp. nov.

( Figs 2–5 View FIGURE 2 View FIGURE 3 View FIGURE 4 View FIGURE 5 )

(Korean Name: Min-du-ma-di-cham-ol-chaeng-i-sae-u, new)

Type material. Holotype, adult male, 3.55 mm, cat no. NIBRIV0000812747, Anmok Harbour , Yeonpyeong I., Yeonpyeong-myeon , Ongin-gun, Incheon-si, Korea, 37° 39' 19.8"N, 125° 42' 23.7"E, depth 2–4 m, 23 August 2000, ( Y.H. Kim) collected by light trap (dissected). GoogleMaps

Additional material examined: 1 ♂, Hagampo Harbour , Banggal-ri, Taean-gun, Chungcheongnam-do, Korea, depth 2 m, 36° 54' 09.0"N, 126° 12' 24.4"E, 25 June 1998, ( C.M. Lee) collected by light trap GoogleMaps ; 1 ♂, Jinri Harbour , Jin-ri , Deokjeok-myeon , Ongjin-gun, Incheon-si, Korea, depth 2 m, 37° 13' 19.2"N, 126° 08' 37.6"E, 20 September 1998, ( C.M. Lee) collected by light trap GoogleMaps ; 1 ♂, Gyeokpo Port , Gyeokpo-ri, Buan-gun, Jeollabuk-do, Korea, depth 2–5 m, 35° 37' 22.2"N, 126° 28' 09.9"E, 16 May 2013, ( N.H. Kim) collected by light trap GoogleMaps .

Diagnosis. Adult male. Carapace longish ellipse in dorsal view, without dorso-lateral carina or ridge, dorsomedian carina marked over whole length of carapace, antennal notch shallow, antero-lateral corner rounded, pseudorostral lobes broadly truncated, ocular lobe triangular, with 8 lenses. Maxilliped 3 merus and carpus dilated. Pereopod 1 carpus not dilated. Pereopod 2 basis with plumose seta. Uropod peduncle with 3–4 plumose and 13–16 microserrate setae medially, endopod biarticulated. Female unknown.

Description. Holotype, adult male, 3.55 mm, cat no. NIBRIV0000812747.

Carapace ( Figs. 2 View FIGURE 2 , 3A, B View FIGURE 3 ) about 1/4 of body length, longish ellipse in dorsal view, 1.8 times as long as wide, 1.8 times as long as deep; surface covered with minute netlike patterns; dorso-median carina marked over whole length of carapace; without dorso-lateral carina and ridge; antennal notch shallow; antero-lateral corner rounded; pseudorostral lobes ( Fig. 3B View FIGURE 3 ) broadly truncated and almost meeting in front of ocular lobe; ocular lobe ( Fig. 3B View FIGURE 3 ) triangular, with 8 lenses. Pereon 0.6 times as long as carapace length. Pleon plump, 1.5 times as long as carapace and pereon together.

Antenna 1 ( Fig. 3C View FIGURE 3 ) peduncle 3-articulate; article 1 1.2 times as long as remaining articles combined, with several hair-like, 6 simple, and 2 complex pedunculate setae; article 2 0.3 times article 1 length, with 2 simple and 3 complex pedunculate setae distally; article 3 1.6 times article 2 length, with 2 complex pedunculate setae terminally. Main flagellum 2-articulate; article 1 with 4 aesthetascs; article 2 with 2 aesthetascs, 4 long simple and 1 complex pedunculate setae terminally. Accessory flagellum very minute, with 2 short simple and 2 complex pedunculate setae.

Antenna 2 ( Fig. 3D View FIGURE 3 ) extending beyond pereon; peduncle 5-articulated; article 1 unarmed; article 2 with 2 plumose setae; article 3 with 1 plumose seta; articles 4–5 with numerous simple setae.

Left mandible ( Fig. 3E View FIGURE 3 ) with row of hair-like and 9 lifting setae; incisor with 5 teeth; lacinia mobilis with 3 teeth.

Right mandible ( Fig. 3F View FIGURE 3 ) with row of hair-like and 10 lifting setae; incisor with 4 teeth.

Maxilla 1 ( Fig. 3G View FIGURE 3 ) outer endite with 12 stout simple, 1 microserrate, and hair-like setae terminally; inner endite with 2 simple, 1 stout simple, 1 microserrate, and 1 tricuspid setae terminally; palp broken, with 2 setae.

Maxilla 2 ( Fig. 4A View FIGURE 4 ) broad endite with several hair-like and 11 simple setae medially, several hair-like setae on medial face, 21 simple, 3 pappose, and 1 plumose setae terminally; outer endite with 6 simple setae terminally; inner endite with 4 microserrate and 2 simple setae terminally.

Maxilliped 1 ( Fig. 4B View FIGURE 4 ) basis 1.3 times as long as remaining articles combined, with 2 simple, 1 long plumose, and 10 hair-like setae, medial lobe with 2 hook, 5 plumose, and 5 simple setae; ischium absent; merus 0.2 times basis length, with 2 plumose setae mediodistally; carpus 2.0 times merus length, with 4 plumose, 9 simple, and 5 beak setae medially, few hair-like setae on medial face, 1 long plumose seta laterodistally; propodus 0.5 times carpus length, with 5 simple, 2 plumose, and 1 long plumose setae distally; dactylus 0.7 times propodus length, with 4 simple setae terminally.

Maxilliped 2 ( Fig. 4C View FIGURE 4 ) basis longer than remaining articles combined, with 1 short simple and several hairlike setae medially, 1 long plumose seta on medial distal corner, 4 short simple and 1 long simple setae laterodistally; ischium short, unarmed; merus with 1 long plumose seta mediodistally; carpus 0.8 times merus length, with 5 plumose and few hair-like setae medially, 1 short simple seta laterally; propodus 1.2 times carpus length, with 5 plumose setae medially, 2 long plumose setae laterally; dactylus 0.3 times propodus length, with 2 long simple, 2 simple, and 1 stout microserrate setae terminally.

Maxilliped 3 ( Fig. 4D View FIGURE 4 ) basis 1.9 times as long as remaining articles combined, with numerous hair-like setae on both margins, 5 short simple setae medially, 2 plumose setae on medial distal corner, 1 simple seta on both faces; lateral corner very inflated, reaching to the middle of merus, with 3 long plumose and 3 plumose setae; ischium 0.1 times basis length, with 4 short simple and 2 plumose setae; merus 1.2 times ischium length, with 1 plumose seta medially, 3 short simple setae on lateral face, several hair-like setae laterally, 2 plumose setae on lateral corner; carpus 0.9 times merus length, with 5 plumose setae medially, 1 short simple seta on lateral face, 1 plumose seta on lateral corner; propodus 0.8 times carpus length, with 4 simple and 2 plumose setae medially, 1 short simple seta on lateral face; dactylus 0.5 times propodus length, with 7 simple, 1 stout microserrate, and few hair-like setae; exopod shorter than basis.

Pereopod 1 ( Fig. 4E View FIGURE 4 ) basis 1.4 times as long as remaining articles combined, with numerous hair-like and 9 microserrate setae medially, 27 short simple setae and 2 short simple setae with single subterminal setule on lateral face, 1 long plumose and 1 plumose setae distally; ischium 0.06 times basis length, unarmed; merus 2.6 times ischium length, with 1 short simple seta and 2 short simple setae with single subterminal setule; carpus 1.2 times merus length, with 1 long simple, 1 short simple setae, and 2 short simple setae with single subterminal setule; propodus 0.8 times carpus length, with 2 short simple and 1 long simple setae medially; dactylus 0.8 times propodus length, with 1 short simple seta laterally, 1 simple and 3 long simple setae terminally; exopod shorter than basis.

Pereopod 2 ( Fig. 4F View FIGURE 4 ) basis fused with ischium, subequal to remaining articles combined, with 2 long plumose, 1 complex pedunculate setae, and 1 short simple seta with subterminal setules medially, 1 short simple seta with subterminal setules on medial face, 1 broken, 2 complex pedunculate setae, and 2 short simple setae with subterminal setules laterally; merus 0.3 times basis length, with 1 simple seta with subterminal setules laterally, 1 stout microserrate seta with single subterminal setule distally; carpus subequal to merus length, with 1 short simple seta with single subterminal setule and 2 stout microserrate setae with subterminal plumose mediodistally, 2 simple setae with single subterminal setule laterally; propodus 0.4 times carpus length, unarmed; dactylus 2.4 times propodus length, with 1 short simple seta with single subterminal setule medially, 1 simple seta with subterminal setules and 1 simple seta with single subterminal setule laterally, 1 short simple, 1 simple setae, 1 long simple seta with subterminal setules, and 1 long simple seta with single subterminal setule terminally.

Pereopod 3 ( Fig. 5A View FIGURE 5 ) basis subequal to remaining articles combined, with 1 complex pedunculate seta and 4 simple setae with subterminal setules proximally, 1 complex pedunculate seta and 3 simple setae with subterminal setules medially, 1 long plumose seta and 1 simple seta with subterminal setules laterally, 1 long plumose seta laterodistally; ischium 0.1 times basis length, with 2 annulate setae laterodistally; merus 1.8 times ischium length, with 2 annulate setae laterodistally; carpus 1.7 times merus length, with 1 simple seta with single subterminal setule medially, 1 annulate seta and 1 long annulate seta with single subterminal setule on medial distal margin, 1 simple seta laterally; propodus 0.7 times carpus length, with 1 annulate seta with single subterminal setule on medial distal corner, 1 complex pedunculate seta laterodistally; dactylus 0.5 times propodus length, with 1 short simple, 1 long simple, and 1 stout simple setae terminally.

Pereopod 4 ( Fig. 5B View FIGURE 5 ) basis 0.7 times as long as remaining articles combined, with 2 complex pedunculate setae medially, 3 plumose setae on lateral face, 1 plumose seta laterodistally; ischium 0.2 times basis length, with 2 annulate setae laterodistally; merus 1.8 times ischium length, with 2 annulate setae laterodistally; carpus 1.7 times merus length, with 2 annulate setae with single subterminal setule mediodistally, 1 long annulate seta with single subterminal setule on medial distal margin, 1 simple seta laterally; propodus 0.6 times carpus length, with 1 annulate seta with single subterminal setule mediodistally; dactylus 0.5 times propodus length, with 1 short simple, 1 simple, and 1 stout simple setae terminally.

Pereopod 5 ( Fig. 5C View FIGURE 5 ) basis 0.5 times as long as remaining articles combined, with 1 plumose and 1 complex pedunculate setae medially; 2 plumose setae laterally; ischium 0.2 times basis length, with 2 annulate setae laterodistally; merus 2.0 times ischium length, with 2 annulate setae laterodistally; carpus 1.4 times merus length, with 1 simple seta with single subterminal setule and 1 annulate seta mediodistally, 1 simple and 1 long annulate setae on medial distal margin; propodus 0.8 times carpus length, with 1 annulate seta mediodistally, 1 complex pedunculate seta laterodistally; dactylus 0.5 times propodus length, with 1 short simple and 1 stout simple setae terminally.

Uropod ( Fig. 5D View FIGURE 5 ) peduncle 1.6 times pleotelson length, with 3–4 plumose and 13–16 microserrate setae medially. Uropod endopod biarticulate, 0.7 times peduncle length; article 1 3.0 times article 2 length, with 10 microserrate setae medially; article 2 with 1 microserrate seta mediodistally, 1 long microserrate seta terminally. Uropod exopod little longer than endopod length, article 1 unarmed; article 2 with 1 short simple and 6 plumose setae medially, 1 simple seta, 1 long simple seta with single subterminal setule, and 1 short simple seta with subterminal setules terminally.

Etymology. The new species name incarinata is from the combination of the Latin words in, meaning ‘no’ and carinatus, meaning ‘shaped like a keel’, alluding to the lack of any dorso-lateral carina on the carapace.

Remarks. This new species Bodotria ( Atlantobodotria) incarinata sp. nov. is similar to B. ( A.) corallina Mühlenhardt-Siegel, 2000 and B. ( A.) nitida Day, 1978 in the combination of the following features: 1) carapace smooth, without dorso-lateral carina and lateral ridge or other structures; 2) antennal notch shallow in male; 3) antero-lateral corner rounded; 4) uropod endopod 2-articulate. B. ( A.) nitida is easily distinguished from similar species because of the articulatory peg present between carapace and second pereonite dorso-laterally, and third to fifth pereonites slightly elevated dorsally. Also, the new species is obviously distinguished from B. ( A.) corallina by the following features ( Table 1, condition of B. ( A.) corallina in parenthesis) male: 1) carapace, dorsomedian carina marked over whole length of carapace ( vs. dorso-median carina not pronounced); 2) maxilliped 3, exopod 6-articulate and shorter than basis; merus and carpus dilated; ( vs. exopod 7-articulate and almost subequal to basis; merus not dilated); 3) pereopod 2, basis with plumose seta ( vs. without plumose seta); 4) uropod endopod little shorter than exopod length ( vs. little longer than exopod length).

Depth. 2–5 m.

Distribution. Korea (Yellow Sea).