Bodotria ( Bodotria ) hwanghaensis, Kim & Lee & Kim, 2020

Kim, Sung-Hyun, Lee, Chang-Mok & Kim, Young-Hyo, 2020, Three new species of the genus Bodotria (Crustacea: Cumacea: Bodotriidae) from the Yellow Sea in Korea, Zootaxa 4869 (1), pp. 55-77 : 63-68

Bodotria ( Bodotria) hwanghaensis sp. nov.

( Figs 6–9 )

(Korean Name: Hwang-Hae-cham-ol-chaeng-i-sae-u, new)

Type material. Holotype, adult male, 5.15 mm, cat no. NIBRIV0000837775, Nokdo I., Ocheon-myeon , Boryeongsi, Chungcheongnam-do, Korea, depth 2–3 m, 36° 16' 10.0"N, 126° 16' 03.1"E, 7 June 1997, ( C.M. Lee) collected by light trap (dissected).

Additional material examined: 10 ♂♂, Maryang Harbour , Maryang-ri , Seocheon-gun, Chungcheongnamdo, Korea, depth 2 m, 36° 07' 57.9"N, 126° 30' 03.5"E, 28 September 2011, ( S.H. Kim & S.S. Hong) collected by light trap . 11 ♂♂, Daecheon Port , Sinheuk-dong, Boryeong-si, Chungcheongnam-do, Korea, depth 2–3 m, 36° 19' 43.6"N, 126° 30' 56.9"E, 27 April 2018, ( S.H. Kim, Y.G. Lee & J.H. Heo) collected by light trap .

Diagnosis. Adult male. Carapace almost ovoid in dorsal view, dorso-median carina well-marked over whole length of carapace, dorso-lateral carina well-developed over whole length of carapace and lower edge of mid-lateral depression forming a faint ridge, antennal notch and antero-lateral corner prominent, pseudorostral lobes broadly truncated, ocular lobe subtriangular, with 8 lenses. Maxilliped 3 merus and carpus dilated. Pereopod 1 carpus not dilated. Pereopod 2 basis without plumose seta. Uropod peduncle with 4 plumose and 19–20 microserrate setae medially; endopod uniarticulate. Female unknown.

Description. Holotype, adult male, 5.15 mm, cat no. NIBRIV0000837775.

Carapace ( Figs. 6A, B , 7A, B ) slightly shorter than 1/4 of body length, almost ovoid in dorsal view, 1.4 times as long as wide, 1.7 times as long as deep; surface covered with pits; dorso-median carina well-marked over whole length of carapace; dorso-lateral carina well-developed over whole length of carapace and lower edge of mid-lateral depression forming a faint ridge; antennal notch and antero-lateral corner ( Fig. 7A ) prominent; pseudorostral lobes ( Fig. 7B ) broadly truncated and almost meeting in front of ocular lobe; ocular lobe ( Fig. 7B ) subtriangular, with 8 lenses. Pereon subequal to carapace length; dorso-median carina slightly elevated, except that third pereonite is raised postero-dorsally. Pleon plump, 1.4 times as long as carapace and pereon together.

Antenna 1 ( Fig. 7C ) peduncle 3-articulate; article 1 1.2 times as long as remaining articles combined, with numerous hair-like, 11 short simple, 3 complex pedunculate setae; article 2 0.3 times article 1 length, with 3 short simple and 4 complex pedunculate setae distally; article 3 1.5 times article 2 length, with 2 short simple and 3 complex pedunculate setae distally. Main flagellum 2-articulate; article 1 with 1 short simple seta and 10 aesthetascs; article 2 with 1 short simple, 3 long simple setae, and 2 aesthetascs terminally. Accessory flagellum very minute, with 2 short simple and 2 complex pedunculate setae.

Antenna 2 ( Figs. 7A, D ) extending beyond pleotelson; peduncle 5-articulated; article 1 with 1 plumose seta; article 2 with 2 plumose setae; article 3 with 1 short simple seta; articles 4–5 with numerous simple setae, article 4 with 1 complex pedunculate seta dorsodistally, article 5 with 2 complex pedunculate setae dorsodistally.

Left mandible ( Fig. 7E ) with row of few hair-like and 10 lifting setae; incisor with 5 teeth; lacinia mobilis with 5 teeth.

Right mandible ( Fig. 7F ) with row of few hair-like and 10 lifting setae; incisor with 4 teeth.

Maxilla 1 ( Fig. 7G ) outer endite with few hair-like setae on medial and lateral margins, 1 simple seta laterally, few hair-like, 6 stout simple, 3 stout microserrate, and 1 stout tricuspid setae terminally; inner endite with few hair-like setae medial face, 1 simple seta with subterminal setules, 1 microserrate, 2 stout microserrate, and 2 stout tricuspid setae terminally; palp broken, with 2 setae which one of the 2 setae has some hairs.

Maxilla 2 ( Fig. 8A ) broad endite with several hair-like and 17 simple setae medially, several hair-like setae on lateral face, 1 plumose, 22 simple, 5 stout simple, and 3 stout pappo-microserrate setae terminally; outer endite with 6 stout simple setae terminally; inner endite with 6 stout microserrate setae terminally.

Maxilliped 1 ( Fig. 8B ) basis partly broken, with 1 long plumose seta on medial distal corner, 3 short simple setae on lateral face, few hair-like setae laterodistally, medial lobe with 2 hook and 7 plumo-microserrate setae medially, 5 plumose setae terminally; ischium absent; merus with 2 long plumose setae on medial distal corner, 1 short simple seta laterodistally; carpus 1.9 times merus length, with few hair-like, 4 plumose, 11 simple, and 7 beak setae medially, 1 short simple and 1 long plumose setae laterally; propodus 0.5 times carpus length, with 1 long plumose, 2 plumose, 5 simple setae distally; dactylus 0.7 times propodus length, with 1 simple, 1 long simple, and 2 stout simple setae terminally.

Maxilliped 2 ( Fig. 8C ) basis with several hair-like and 2 short simple setae medially, 1 long plumose seta on medial distal corner, 1 simple and 3 short simple setae laterally; ischium short, unarmed; merus with 1 plumose seta medially, 1 short simple seta laterally; carpus 1.1 times merus length, with few hair-like and 5 plumose setae medially, 1 short simple seta laterally; propodus 0.7 times carpus length, with 6 plumose setae medially, 2 long plumose setae laterally; dactylus 0.5 times propodus length, with 5 simple and 1 stout microserrate setae.

Maxilliped 3 ( Fig. 8D ) basis 1.9 times as long as remaining articles combined, with numerous hair-like setae on both margins, 2 plumose setae on medial distal corner, 1 short simple seta on distal face, lateral corner very inflated, reaching to the middle of merus, with 8 plumose setae; ischium 0.2 times basis length, with 2 plumose setae medially; merus 1.4 times ischium length, with 1 plumose seta medially, 1 plumose seta on lateral corner; carpus 1.3 times merus length, with 3 plumose setae medially, 1 plumose seta laterally; propodus 0.5 times carpus length, with 5 plumose setae medially, 2 short simple setae laterally; dactylus 0.9 times propodus length, with few hair-like setae medially, 1 short simple seta laterally, 2 simple and 4 microserrate setae terminally; exopod shorter than basis.

Pereopod 1 ( Fig. 8E ) basis 1.2 times as long as remaining articles combined, with 6 microserrate setae medially, 1 short simple seta mediodistally, 1 long plumose seta on near medial distal margin, 5 short simple setae on lateral distal face, several hair-like setae lateroproximally, 1 plumose seta laterodistally; ischium 0.05 times basis length, unarmed; merus 3.7 times ischium length, with 5 simple setae; carpus 1.9 times merus length, with 1 simple and 15 short simple setae; propodus 0.5 times carpus length, with 1 short simple seta medially, 2 simple setae on near medial distal corner, 4 simple setae laterally; dactylus subequal to propodus length, with 3 short simple setae laterally, 3 simple and 1 long simple setae terminally; exopod shorter than basis.

Pereopod 2 ( Fig. 9A ) basis fused with ischium, 1.4 times as long as remaining articles combined, with 2 simple and 2 short simple setae medially, 3 short simple and 2 complex pedunculate setae laterally; merus 0.2 times basis length, with 1 simple seta with single subterminal setule on medial distal margin, 1 short simple seta on lateral face; carpus 1.3 times merus length, with 1 short simple seta mediodistally, 2 stout microserrate setae and 1 stout long microserrate seta with subterminal setules on medial distal margin, 1 simple seta with subterminal setules laterodistally; propodus 0.5 times carpus length, unarmed; dactylus 2.1 times propodus length, with 2 short simple setae medially, 1 short simple seta laterally, 2 simple setae with single subterminal setule, 1 simple seta with subterminal setules, 1 long simple seta with single subterminal setule terminally.

Pereopod 3 ( Fig. 9B ) basis 1.4 times as long as remaining articles combined, with 2 complex pedunculate, 7 simple, and 1 long plumose setae; ischium 0.1 times basis length, with 1 short simple and 2 annulate setae laterodistally; merus 1.7 times ischium length, with 1 annulate seta laterodistally; carpus 1.4 times merus length, with 1 simple seta with subterminal setules, 1 annulate seta with single subterminal simple seta, and 1 simple seta on near medial distal corner, 1 broken seta lateroproximally; propodus 0.6 times carpus length, with 1 long simple seta with single subterminal simple seta on medial distal corner; dactylus 0.5 times propodus length, with 1 simple seta mediodistally, 1 simple seta laterodistally, 1 long microserrate seta terminally.

Pereopod 4 ( Fig. 9C ) basis 0.9 times as long as remaining articles combined, with 4 complex pedunculate setae medially, 2 long plumose and 3 short simple setae laterally, 1 long plumose seta on near lateral distal corner; ischium 0.1 times basis length, with 1 short simple and 2 annulate setae on near lateral distal corner; merus 1.8 times ischium length, with 1 annulate seta laterodistally; carpus 1.4 times merus length, with 1 short simple seta medially, 1 simple seta, 1 simple seta with subterminal setules, and 1 annulate seta with single subterminal setule on near medial distal corner, 1 short simple seta laterally; propodus 0.6 times carpus length, with 1 stout long simple seta with single subterminal setule on medial distal corner; dactylus 0.6 times propodus length, with 1 simple seta medially, 1 simple seta laterodistally, 1 stout microserrate seta terminally.

Pereopod 5 ( Fig. 9D ) basis 0.6 times as long as remaining articles combined, with 1 plumose, 1 short simple, and 2 complex pedunculate setae medially, 2 short simple and 1 long plumose setae laterally, 1 plumose seta on lateral distal corner; ischium 0.2 times basis length, with 2 annulate setae on lateral distal corner; merus 1.9 times ischium length, with 1 annulate seta laterodistally; carpus 1.5 times merus length, with 1 short simple seta medioproximally, 1 simple seta, 1 simple seta with subterminal setules, and 1 annulate seta with single subterminal simple seta on medial distal margin, 1 short simple seta lateroproximally; propodus 0.6 times carpus length, with 1 annulate seta with single subterminal simple seta on medial distal corner, 1 complex pedunculate seta on medial distal face; dactylus 0.5 times propodus length, with 1 simple seta medially, 1 simple seta laterodistally, 1 stout long simple seta terminally.

Uropod ( Fig. 9E ) peduncle 1.6 times pleotelson length, with 4 plumose and 19–20 microserrate setae medially. Uropod endopod uniarticulate, 0.6 times peduncle length, serrated on medial margin, with 12–14 stout microserrate setae with single subterminal setule medially, 1 stout microserrate seta with single subterminal setule and 1 stout long simple seta with single subterminal setule terminally. Uropod exopod subequal to endopod length, article 1 unarmed; article 2 with 9–10 plumose setae medially, 2 short simple, 1 simple, and 1 long simple setae terminally.

Etymology. The specific epithet hwanghaensis originates from the Korean word “Hwang-Hae”, meaning the Yellow Sea, named after the region in which the species was discovered.

Remarks. This new species Bodotria ( Bodotria) hwanghaensis sp. nov. is similar to B. ( B.) ovalis Gamô, 1965 in the combination of the following features: 1) carapace almost ovoid in dorsal view; 2) dorso-lateral carina well-developed over whole length of carapace; 3) all free pereonites with lateral carina well-marked; 4) pereopod 1 carpus not dilated; 5) uropod endopod uniarticulate. However, the new species is obviously distinguished from B. ( B.) ovalis by the combination of the following features ( Table 1, condition of B. ( B.) ovalis in parentheses): 1) carapace, dorsal surface is not flattened ( vs. almost flattened); 2) pereon, dorso-median carina slightly elevated, except that third pereonite is raised postero-dorsally ( vs. dorso-median carina on the third to fifth pereonites is raised); 3) pereopod 1, carpus 1.9 times merus length ( vs. 1.5 times merus length); 4) pereopod 2, basis without plumose seta ( vs. with 6 plumose setae).

Depth. 2–3 m.

Distribution. Korea (Yellow Sea).

Figures

FIGURE 6. Bodotria (Bodotria) hwanghaensis sp. nov., holotype, adult male, 5.15 mm: A, lateral view; B, carapace and pereon, dorsal view. Scale bars = 0.5 mm (A, B).

FIGURE 7. Bodotria (Bodotria) hwanghaensis sp. nov., holotype, adult male, 5.15 mm: A, habitus, lateral view; B, carapace and pereon, dorsal view; C, antenna 1; D, antenna 2; E, left mandible; F, right mandible; G, maxilla 1. Scale bars = 1.0 mm (A, B), 0.1 mm (C–F), 0.05 mm (G).

FIGURE 8. Bodotria (Bodotria) hwanghaensis sp. nov., holotype, adult male, 5.15 mm:A, maxilla 2; B, maxilliped 1; C, maxilliped 2; D, maxilliped 3; E, pereopod 1. Scale bars = 0.2 mm (D, E), 0.1 mm (B, C), 0.05 mm (A).

FIGURE 9. Bodotria (Bodotria) hwanghaensis sp. nov., holotype, adult male, 5.15 mm: A, pereopod 2; B, pereopod 3; C, pereopod 4; D, pereopod 5; E, pleotelson. Scale bars = 0.2 mm (A–E).