Bodotria (Bodotria) pseudomaculosa, 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 : 68-74

Bodotria (Bodotria) pseudomaculosa sp. nov.

( Figs 10–13 )

(Korean Name: Han-jul-gom-bo-cham-ol-chaeng-i-sae-u, new)

Type material. Holotype, adult male, 6.12 mm, cat no. NIBRIV0000837774, Jawol-myeon , Ongjin-gun, Incheonsi, Korea, 37° 00' 30.0"N, 126° 07' 30.0"E, depth 30–50 m, 23 May 2007, (S.J. Song) collected by rectangular dredge (dissected).

Diagnosis. Adult male. Carapace almost ovoid in dorsal view, surface covered with coarse squamose-reticulate patterning formed by large, shallow pits, dorso-median carina well-marked over whole length of carapace, dorsolateral carina well-developed over whole length of carapace and lower edge of mid-lateral depression forming an angular ridge, antennal notch and antero-lateral corner prominent, pseudorostral lobes wide and truncated, ocular lobe almost semicircular, with 8 lenses. Maxilliped 3 merus and carpus dilated. Pereopod 1 carpus little dilated. Pereopod 2 basis with plumose seta. Uropod peduncle with 3–5 plumose and 23–25 microserrate setae medially; endopod uniarticulate. Female unknown.

Description. Holotype, adult male, 6.12 mm, cat no. NIBRIV0000837774.

Carapace ( Figs. 10A, B , 11A, B ) about 1/4 of body length, almost ovoid in dorsal view, 1.4 times as long as wide, 1.8 times as long as deep; surface covered with coarse squamose-reticulate patterning formed by large, shallow 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 an angular ridge; antennal notch and antero-lateral corner ( Fig. 11A ) prominent; pseudorostral lobes ( Fig. 11B ) wide and truncated, meeting in front of ocular lobe; ocular lobe ( Fig. 11B ) almost semicircular, with 8 lenses. Pereon 0.9 times as long as carapace length; dorso-median carina and lateral carina well-marked on all free pereonites. Pleon plump, 1.2 times as long as carapace and pereon together.

Antenna 1 ( Fig. 11C ) peduncle 3-articulate; article 1 1.7 times as long as remaining articles combined, with numerous hair-like setae distally; article 2 0.3 times article 1 length, with 1 short simple and 5 complex pedunculate setae distally; article 3 1.3 times article 2 length, with 1 short simple seta on distal margin. Main flagellum 2-articulate; article 1 with 1 short simple seta and 6 aesthetascs; article 2 with 1 complex pedunculate, 1 short simple, 2 long simple setae, and 2 aesthetascs terminally. Accessory flagellum very minute, with 1 short simple and 1 complex pedunculate setae.

Antenna 2 ( Figs. 11A, D ) extending beyond pleotelson; peduncle 5-articulated; article 2 with 2 plumose setae; articles 4–5 with numerous simple setae, 2 complex pedunculate setae dorsodistally.

Left mandible ( Fig. 11E ) with row of few hair-like and 11 lifting setae;incisor with 5 teeth; lacinia mobilis with 3 teeth.

Right mandible ( Fig. 11F ) with row of 9 lifting setae; incisor with 4 teeth.

Maxilla 1 ( Fig. 11G ) outer endite with few hair-like setae on medial margin, 1 long simple seta laterally, several hair-like and 12 stout simple setae terminally; inner endite with 3 hair-like setae on mediodistally, 2 simple, 2 stout tricuspid, 2 stout microserrate setae terminally; palp broken, with 2 setae which one of the 2 setae has some hairs and another seta broken.

Maxilla 2 ( Fig. 12A ) broad endite with several hair-like and 17 plumose setae medially, 3 plumose, 20 simple, 9 microserrate, 1 stout pappose, and 3 stout pappo-microserrate setae terminally; outer endite with 7 simple setae terminally; inner endite with 7 microserrate setae terminally.

Maxilliped 1 ( Fig. 12B ) basis 1.3 times as long as remaining articles combined, with 4 short simple, several hair-like, and 1 long plumose setae, medial lobe with 2 hook and 5 plumose setae medially, 3 short simple setae distally, 4 plumose and 1 short simple setae on terminal margin; ischium absent; merus 0.3 times basis length, with 2 long plumose setae on medial distal corner, 1 short simple seta laterodistally; carpus 1.7 times merus length, with 14 plumose and 6 beak setae medially, 1 short simple seta on lateral face, 1 long plumose seta laterodistally; propodus 0.4 times carpus length, with 4 plumose, 2 plumo-microserrate, and 1 long plumose setae; dactylus 0.7 times propodus length, with 3 simple and 1 microserrate setae terminally.

Maxilliped 2 ( Fig. 12C ) basis longer than remaining articles combined, with several hair-like and 1 short simple setae medially, 1 long plumose seta on medial distal corner, 1 simple and 4 short simple setae laterally; ischium short, unarmed; merus with 1 plumose seta medially, 1 short simple seta laterally; carpus 1.2 times merus length, with few setules and 5 plumose setae medially, 1 short simple seta laterally; propodus 0.7 times carpus length, with 8 plumose setae medially, 2 long plumose setae laterally; dactylus 0.4 times propodus length, with 6 simple, 1 microserrate, and 1 stout microserrate setae.

Maxilliped 3 ( Fig. 12D ) 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 0.1 times basis length, with 2 plumose setae medially; merus 1.2 times ischium length, with 1 plumose seta medially, 1 plumose seta on lateral corner; carpus 1.1 times merus length, with 5 plumose setae medially; propodus 0.6 times carpus length, with 4 plumo-microserrate setae medially, 1 short simple seta laterodistally; dactylus 0.8 times propodus length, with few hair-like setae medially, 1 short simple seta laterally, 3 simple, 2 microserrate, and 1 long microserrate setae terminally; exopod shorter than basis.

Pereopod 1 ( Fig. 12E ) basis 1.4 times as long as remaining articles combined, with numerous hair-like and 14 microserrate setae medially, 1 long plumose seta mediodistally, 1 short simple seta on lateral distal face, 1 plumose seta laterodistally; ischium 0.05 times basis length, unarmed; merus 3.2 times ischium length, with 1 short simple seta with subterminal setules medially; carpus 2.1 times merus length, with 1 simple and 14 short simple setae; propodus 0.3 times carpus length, with 1 short simple seta medially, 2 simple setae on medial distal corner, 1 short simple seta laterodistally; dactylus subequal to propodus length, with 2 short simple, 2 simple, 1 microserrate, and 1 long microserrate setae; exopod shorter than basis.

Pereopod 2 ( Fig. 13A ) basis fused with ischium, 1.4 times as long as remaining articles combined, with 1 short simple seta and 1 simple seta with subterminal setules medially, 2 long plumose and 4 short simple setae on medial face, 1 complex pedunculate and 2 short simple setae on lateral face, 3 short simple and 1 complex pedunculate setae laterally; merus 0.2 times basis length, with 1 simple seta with subterminal 1 plumose seta on near medial distal margin, 3 short simple setae on lateral face; carpus 1.2 times merus length, with 1 stout microserrate seta, 1 stout microserrate seta with single subterminal setule, and 1 stout long microserrate seta with subterminal 1 complex pedunculate seta on medial distal margin, 1 short simple and 1 simple setae laterodistally; propodus 0.6 times carpus length, unarmed; dactylus 1.8 times propodus length, with 4 short simple, 1 broken setae, and 2 simple setae with single subterminal setule.

Pereopod 3 ( Fig. 13B ) basis 1.2 times as long as remaining articles combined, with 3 complex pedunculate setae medially, 2 short simple setae laterally, 1 long plumose seta on lateral distal corner; ischium 0.1 times basis length, with 1 short simple seta on lateral face, 2 annulate setae on lateral distal corner; merus 1.7 times ischium length, with 2 short simple and 1 annulate setae; carpus subequal to merus length, with 1 simple seta, 1 simple seta with subterminal setules, and 1 long simple seta single subterminal setule on medial distal corner, 1 simple seta laterally; propodus 0.8 times carpus length, with 1 long simple seta on medial distal corner; dactylus 0.5 times propodus length, with 2 simple and 1 stout microserrate setae terminally.

Pereopod 4 ( Fig. 13C ) basis 0.8 times as long as remaining articles combined, with 4 complex pedunculate and 7 short simple setae medially, 1 long plumose seta on proximal lateral face, 5 short simple setae laterally, 1 long plumose seta on lateral distal corner; ischium 0.2 times basis length, with 1 short simple and 2 annulate setae laterodistally; merus 1.8 times ischium length, with 1 annulate seta laterodistally; carpus 1.2 times merus length, with 1 simple, 1 plumose setae, and 1 stout long simple seta with single subterminal setule on medial distal corner, 1 broken seta laterally; propodus 0.7 times carpus length, with 1 stout long simple seta with single subterminal setule on medial distal corner; dactylus 0.5 times propodus length, with 2 simple and 1 stout simple setae terminally.

Pereopod 5 ( Fig. 13D ) basis 0.6 times as long as remaining articles combined, with 1 plumose, 3 short simple setae, and 1 short simple seta with single subterminal setule medially, 1 plumose and 2 short simple setae laterally, 1 plumose seta on lateral distal corner; ischium 0.3 times basis length, with 1 short simple and 2 annulate setae laterodistally; merus 1.8 times ischium length, with 2 short simple and 1 annulate setae laterally; carpus 1.1 times merus length, with 1 simple, 1 plumose setae, and 1 stout long simple seta with single subterminal setule on near medial distal corner, 1 complex pedunculate and 1 short simple setae laterally; propodus 0.7 times carpus length, with 1 stout long simple seta with single subterminal setule on medial distal corner; dactylus 0.5 times propodus length, with 2 simple and 1 stout simple setae terminally.

Uropod ( Fig. 13E ) peduncle 1.5 times pleotelson length, with 3–5 plumose and 23–25 microserrate setae medially. Uropod endopod uniarticulate, 0.6 times peduncle length, with 12 stout microserrate setae with single subterminal setule medially, 1 stout microserrate seta with single subterminal setule and 1 stout microserrate seta terminally. Uropod exopod subequal to endopod length, article 1 unarmed; article 2 with 8–9 plumose setae medially, 1 short simple, 1 simple, and 1 long simple setae terminally.

Etymology. The new species is named pseudomaculosa due to similiarity to the species Bodotria maculosa .

Remarks. The new species Bodotria (Bodotria) pseudomaculosa sp. nov. is similar to B. (B.) maculosa Hale, 1944 in the combination of the following features: 1) carapace almost ovoid in dorsal view, surface covered with coarse squamose-reticulate patterning formed by large, shallow pits; 2) pseudorostral lobes wide and truncated; 3) carapace dorso-lateral carina well-developed over whole length of carapace; 4) all free pereonites, dorso-median carina and lateral carina well-marked; 5) uropod endopod uniarticulate. However, the new species is obviously distinguished from B. (B.) maculosa by the combination of the following features ( Table 1, condition of B. (B.) maculosa in parentheses): 1) carapace, lower edge of mid-lateral depression forming an angular ridge (vs. with a prominent longitudinal ridge and curves up posteriorly to meet the carina), 2) ocular lobe with 8 lenses (vs. with 9 lenses); 3) third and fourth pereonites, dorso-median carina slight elevated posteriorly (vs. dorso-median carina of third to fifth pereonites elevated posteriorly); 4) thoracic appendages, margins not serrate (vs. more or less serrate); 5) uropod peduncle with plumose and microserrate setae medially (vs. with only plumose seta).

Depth. 30–50 m.

Distribution. Korea (Yellow Sea).

Figures

FIGURE 10. Bodotria (Bodotria) pseudomaculosa sp. nov., holotype, adult male, 6.12 mm: A, lateral view; B, carapace and pereon, dorsal view. Scale bars = 1.0 mm (A), 0.5 mm (B).

FIGURE 11. Bodotria (Bodotria) pseudomaculosa sp. nov., holotype, adult male, 6.12 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 12. Bodotria (Bodotria) pseudomaculosa sp. nov., holotype, adult male, 6.12 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 (A–C).

FIGURE 13. Bodotria (Bodotria) pseudomaculosa sp. nov., holotype, adult male, 6.12 mm: A, pereopod 2; B, pereopod 3; C, pereopod 4; D, pereopod 5; E, pleotelson. Scale bars = 0.3 mm (E), 0.2 mm (A–D).