Bodotria paraspinifera, Kim & Lee & Kim, 2020

Kim, Sung-Hyun, Lee, Chang-Mok & Kim, Young-Hyo, 2020, Bodotria paraspinifera sp. nov. (Crustacea: Cumacea: Bodotriidae), a new Korean cumacean, Zootaxa 4731 (4), pp. 543-555 : 544-554

Bodotria paraspinifera sp. nov.

( Figs. 1–7 )

(Korean Name: Jan-ga-si-tu-seong-cham-ol-chaeng-i-sae-u, new)

Type material. Holotype, marsupial female, 7.07 mm, cat no. NIBRIV0000325975, Passenger Terminal Port, Geomun Is., Yeosu-si , Jeollanam-do, 34° 01’ 39.6”N, 127° 18’ 31.8”E, depth 8-10m, 31 May 2014, (N.H. Kim & S.H. Kim & S.S. Hong) collected by light trap . Paratypes, 1 adult male, cat no. DKUCUM 201901, data same as holotype (dissected) ; and the remaining paratypes 30♂♂, 2♀, data same as holotype .

Diagnosis. Body covered with numerous spinules. Carapace almost rectangular in dorsal view, without lateral oblique ridge; anterior portion gradually narrows forward at about 1/5; dorso-lateral carina well-developed over whole length of carapace; ocular lobe with 8 lenses. Pereopod 1 basis with numerous small tubercles in rows on medial surface; carpus length almost subequal to ischium and merus combined. Uropod peduncle 1.3 times pleonite 6 length; endopod uniarticulate, 0.6 times peduncle length. Adult male subequal to female, carapace anterior portion gradually narrows forward at about 1/4. Pereopod 1 basis without small tubercle; carpus length almost subequal to ischium and merus combined. Uropod peduncle 1.4 times pleonite 6 length, with plumose and microserrate setae medially; endopod 0.6 times peduncle length.

Description. Holotype, marsupial female, 7.07 mm, cat no. NIBRIV0000325975, surface of body ( Fig. 1A ) covered with numerous spinules. Carapace ( Figs. 1A, 1B , 2A, 2B ) about 0.2 times as long as body length, almost rectangular in dorsal view, 1.2 times as long as its width, 1.6 times as long as its depth; dorso-median carina wellmarked 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 as second carina; antennal notch and antero-lateral corner ( Fig. 2A ) prominent; pseudorostral lobes ( Figs. 1B , 2B ) broadly truncated and almost met in front of ocular lobe; ocular lobe ( Fig. 2B ) subtriangular, with 8 lenses. Pereon 1.2 times as long as carapace length; dorso-median carina elevated and lateral carina well-marked on all free pereonites. Pleon slightly, subequal to cephalothorax length.

Antenna 1 ( Fig. 2C ) peduncle 3-articulate; article 1 1.5 times as long as remaining articles combined, with numerous hair-like, 13 short simple, and 5 complex pedunculate setae; article 2 0.3 times article 1 length, with 1 short simple and 4 complex pedunculate setae distally; article 3 1.1 times article 2 length, with 4 short simple and 3 complex pedunculate setae. Main flagellum 2-articulate; article 1 unarmed; article 2 with 1 complex pedunculate, 1 short simple, 3 long simple setae, and 2 aesthetasc terminally. Accessory flagellum very minute, with 2 complex pedunculate setae.

Right mandible ( Fig. 2D ) with row of 13 lifting setae; incisor with 3 teeth.

Left mandible ( Fig. 2E ) with row of 12 lifting setae; incisor with 5 teeth; lacinia mobilis with 5 teeth.

Maxilla 1 ( Fig. 2F ) outer endite with several hair-like setae on both margins, 1 simple seta laterodistally, few hair-like, 8 stout simple, and 6 stout serrate setae terminally; inner endite with several hair-like setae on both margins, 2 simple, 2 stout tricuspid, and 2 stout microserrate setae terminally; palp with 2 setae.

Maxilla 2 ( Fig. 2G ) broad endite with numerous hair-like and 26 simple setae medially, 2 plumose, 10 simple, 6 stout microserrate, and 4 stout pappo-microserrate setae terminally; outer endite with 8 stout simple setae terminally; inner endite with 8 stout microserrate setae terminally.

Maxilliped 1 ( Fig. 3A ) with numerous hair-like and 8 short simple setae on lateral face, 1 long plumose seta on medial distal corner, medial lobe with 2 hook and 7 plumose setae medially, 2 plumose and 2 stout simple setae terminally; ischium absent; merus with 2 long plumose setae on medial distal corner, several hair-like setae laterally; carpus 1.8 times merus length, with 1 long plumose, 3 short simple, 5 plumose, 13 simple, and 7 beak setae; propodus 0.5 times carpus length, with 1 long plumose, 1 stout simple, and 4 simple setae distally; dactylus 0.6 times propodus length, with 1 simple and 2 stout simple setae terminally.

Maxilliped 2 ( Fig. 3B ) basis 2.0 times as long as remaining articles combined, with numerous hair-like, 23 short simple, 1 simple, and 1 long plumose setae; ischium short, unarmed; merus 0.2 times basis length, with 1 plumose seta medially, 1 short simple seta laterally; carpus subequal to times merus length, with few hair-like and 5 plumose setae medially; propodus 0.8 times carpus length, with 4 plumose and 2 microserrate setae medially, 1 long plumose seta on medial face, 1 long plumose seta laterodistally; dactylus 0.4 times propodus length, with 2 simple, 1 microserrate, and 1 stout long microserrate setae.

Maxilliped 3 ( Fig. 3C ) basis 1.7 times as long as remaining articles combined, with numerous hair-like setae on both margins, 3 short simple setae mediodistally, 2 plumose setae on medial distal corner, several hyaline flattened teeth laterally, lateral corner very inflated, reaching to the middle of merus, with 12 plumose setae; ischium 0.1 times basis length, with 5 short simple, 3 simple, and 2 plumose setae medially; merus 1.1 times ischium length, with 2 short simple and 1 plumose setae medially, serrated on lateral margin, 1 plumose seta on lateral corner; carpus 0.8 times merus length, with 6 short simple and 6 plumose setae medially, serrated on lateral margin, 1 plumose seta on lateral corner; propodus 0.8 times carpus length, with 2 plumo-microserrate setae medially, 2 short simple setae on lateral face; dactylus subequal to propodus length, with few hair-like, 1 simple, and 1 short simple setae medially, 1 microserrate and 1 simple setae mediodistally, 1 short simple and 1 simple setae laterally, 1 short simple, 1 microserrate, 1 long simple, and 1 long stout microserrate setae terminally; exopod shorter than basis.

Pereopod 1 ( Fig. 3D ) basis 1.2 times as long as remaining articles combined, with several hair-like and 14 short simple setae medially, numerous small tubercles in rows on medial surface, 1 long plumose seta on medial distal face, 8 short simple setae on lateral face, 1 plumose seta on lateral distal corner; ischium 0.06 times basis length, with 2 short simple setae on lateral face; merus 3.6 times ischium length, with 9 short simple setae; carpus 1.5 times merus length, with 1 simple and 19 short simple setae; propodus 0.5 times carpus length, with 1 simple and 4 short simple setae medially, 4 short simple setae laterally; dactylus 0.9 times propodus length, with 1 short simple seta mediodistally, 2 short simple setae laterodistally, 1 simple, 1 microserrate, and 1 stout long microserrate setae terminally.

Pereopod 2 ( Fig. 3E ) basis fused with ischium, 1.5 times as long as remaining articles combined, with 1 simple, 22 short simple, and 2 complex pedunculate setae; merus 0.2 times basis length, with 4 short simple setae distally; carpus subequal to merus length, with 3 short simple and 2 stout simple setae medially, 2 short simple setae and 1 simple seta with subterminal setules laterally; propodus 0.6 times carpus length, with 1 short simple seta on lateral face, 1 complex pedunculate seta on medial distal margin; dactylus 2.1 times propodus length, with several hyaline flattened teeth on both margins, 3 short simple setae medially, 1 short simple seta laterally, 1 microserrate seta, 2 stout simple setae with single subterminal simple seta, and 1 stout long simple seta with single subterminal simple seta terminally.

Pereopod 3 ( Fig. 4A ) basis 1.5 times as long as remaining articles combined, with 19 short simple, 3 complex pedunculate, 1 pedunculate, and 1 long plumose setae; ischium 0.1 times basis length, with 1 short simple seta on medial distal face, 2 annulate setae laterodistally; merus 1.7 times ischium length, with 1 short simple seta with single subterminal setule on lateral face, 1 annulate seta laterodistally; carpus subequal to merus length, with 1 short simple seta medially, 1 short simple seta, 1 simple seta with subterminal setules, and 1 stout long simple seta with single subterminal setule on medial distal corner, 1 short simple seta laterally; propodus 0.8 times carpus length, with 1 complex pedunculate seta and 1 stout long seta with single subterminal setule on medial distal corner; dactylus 0.7 times propodus length, with 2 simple and 1 stout simple setae terminally.

Pereopod 4 ( Fig. 4B ) basis subequal to remaining articles combined, with 14 short simple, 1 plumose, and 1 long plumose setae; ischium 0.1 times basis length, with 1 short simple and 2 annulate setae laterally; merus 2.1 times ischium length, with 1 short simple and 1 annulate setae laterally; carpus 1.2 times merus length, with 1 short simple seta medially, 2 short simple setae on medial face, 1 short simple, 1 broken setae, and 1 stout long simple seta with single subterminal setule on near medial distal margin, 1 simple 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. 4C ) basis 0.6 times as long as remaining articles combined, with 1 short simple and 2 complex pedunculate setae medially, 3 short simple and 2 plumose setae laterally; ischium 0.2 times basis length, with 2 annulate setae laterodistally; merus 1.8 times ischium length, with 1 short simple and 1 annulate setae laterally; carpus 1.2 times merus length, with 1 short simple seta medioproximally, 1 simple seta, 1 simple seta with subterminal setules, and 1 stout long simple seta with single subterminal setule on near medial distal corner; 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 1 short simple, 1 simple, and 1 stout simple setae terminally.

Uropod ( Fig. 4D ) peduncle 1.3 times pleotelson length, serrated on both margins, with 55–68 short simple setae. Uropod endopod uniarticulate, 0.6 times peduncle length, serrated on medial margin, with 10–14 short simple, 1–2 complex pedunculate, 6 stout simple, and 2 terminal setae. Uropod exopod subequal to endopod length, article 1 unarmed; article 2 with 8 plumose setae medially, 9–10 short simple setae on lateral margin and both faces, 1 short simple, 1 stout simple setae, and 1 simple seta with single subterminal setule terminally.

Paratype, adult male, 7.56 mm, cat no. DKUCUM 201901, surface of body covered with numerous spinules ( Figs. 5 A–D), such as female. Carapace ( Figs. 1C, 1D , 6A, 6B ) about 0.3 times as long as body length, 1.2 times as long as its width, 1.6 times as long as its depth; shape and sculpture of carapace similar to female. Pereon subequal to carapace length; Pleon plump, 1.3 times as long as cephalothorax length.

Antenna 1 ( Fig. 6C ) peduncle 3-articulate; article 1 1.2 times as long as remaining articles combined, with numerous hair-like, 3 short simple, 5 complex pedunculate setae; article 2 0.4 times article 1 length, with 4 complex pedunculate setae distally; article 3 subequal to article 2 length, with 3 complex pedunculate setae distally. Main flagellum 2-articulate; article 1 with 1 short simple seta and 6 aesthetasc; article 2 with 1 complex pedunculate, 3 broken setae, and 2 aesthetasc terminally. Accessory flagellum very minute, with 1 short simple and 2 complex pedunculate setae.

Antenna 2 ( Figs. 6A, 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.

Maxilliped 3 ( Fig. 6E ) basis 1.9 times as long as remaining articles combined, with numerous hair-like setae on both margins, 9 short simple and 2 simple setae medially, 2 plumose setae on medial distal corner; lateral corner very inflated, extending beyond the middle of merus, with 12 plumose setae; ischium 0.1 times basis length, with 3 simple, 4 short simple, and 1 plumose setae medially; merus 1.2 times ischium length, with 2 short simple and 1 plumose setae medially, 1 short simple seta on lateral face, serrated on lateral margin, 1 plumose seta on lateral corner; carpus 1.2 times merus length, with 6 plumose and 7 short simple setae medially, serrated on near lateral margin, 1 plumose seta on lateral corner; propodus 0.3 times carpus length, with 4 plumose setae medially; dactylus 1.4 times propodus length, with few hair-like and 1 microserrate setae medially, 1 simple seta lateroproximally, 1 short simple, 2 long simple, 2 microserrate, and 1 stout long microserrate setae terminally; exopod shorter than basis.

Pereopod 1 ( Fig. 6F ) basis 1.3 times as long as remaining articles combined, with 12 stout simple, 1 simple, and 4 short simple setae medially, several hair-like and 1 short simple setae lateroproximally, 1 long plumose and 1 plumose setae on laterodistally; ischium 0.1 times basis length, unarmed; merus 2.5 times ischium length, with 4 short simple setae medially; carpus 1.7 times merus length, with 1 simple and 13 short simple setae medially, 2 short simple setae on lateral face, 4 short simple setae laterally; propodus 0.4 times carpus length, with 3 short simple and 2 simple setae medially, 3 short simple setae laterally; dactylus subequal to propodus length, with 1 short simple and 1 simple setae mediodistally, 2 short simple setae laterally, 1 short simple, 1 broken, and 1 microserrate setae terminally.

Pereopod 2 ( Fig. 7A ) basis fused with ischium, 1.6 times as long as remaining articles combined, with 4 short simple, 4 plumose, and 1 complex pedunculate setae medially, 1 short simple seta on medial distal face, 7 short simple and 1 pedunculate setae laterally; merus 0.2 times basis length, with 1 stout simple seta with single subterminal setule on near medial distal margin, 1 short simple seta laterodistally; carpus subequal to merus length, with 1 short simple seta medially, 1 stout microserrate seta and 2 stout microserrate setae with single subterminal setule on near medial distal margin, 2 short simple and 1 plumose setae laterally; propodus 0.5 times carpus length, with 1 complex pedunculate seta on near medial distal margin; dactylus 2.3 times propodus length, with several hyaline flattened teeth on both margins, 1 short simple seta medially, 1 short simple and 1 stout simple setae laterally, 1 simple, 1 stout long simple setae, and 1 stout simple seta with single subterminal setule terminally.

Pereopod 3 ( Fig. 7B ) basis 1.4 times as long as remaining articles combined, with 4 short simple and 4 complex pedunculate setae medially, 5 short simple setae laterally, 1 short simple and 1 long plumose setae on lateral distal corner; ischium 0.1 times basis length, with 2 annulate setae laterodistally; merus 1.8 times ischium length, with 1 annulate seta laterodistally; carpus 1.3 times merus length, with 1 short simple seta medioproximally, 1 simple seta with subterminal setules and 1 stout long simple seta with single subterminal setule mediodistally, 1 short simple seta laterally; propodus 0.7 times carpus length, with 1 stout long simple seta with single subterminal simple seta on medial distal corner; dactylus 0.5 times propodus length, with 2 simple and 1 stout long microserrate setae terminally.

Pereopod 4 ( Fig. 7C ) basis subequal to remaining articles combined, with 1 pedunculate, 1 short simple, and 2 complex pedunculate setae medially, 2 short simple, 1 complex pedunculate, and 1 long plumose setae laterodistally; ischium 0.1 times basis length, with 2 annulate setae laterodistally; merus 1.7 times ischium length, with 1 short simple seta medially, 1 annulate seta laterodistally; carpus 1.6 times merus length, with 1 short simple seta mediodistally, 1 simple seta with subterminal setules and 1 stout long simple seta with single subterminal setule on near medial distal corner, 1 simple and 1 short simple setae laterally; propodus 0.6 times carpus length, with 1 stout long simple seta with single subterminal setule on medial distal corner, 1 complex pedunculate seta laterodistally; dactylus 0.5 times propodus length, with 2 simple and 1 stout long microserrate setae terminally.

Pereopod 5 ( Fig. 7D ) basis 0.6 times as long as remaining articles combined, with 1 plumose, 3 complex pedunculate, and 3 short simple setae medially, 3 short simple and 2 plumose setae laterally; ischium 0.2 times basis length, with 1 short simple and 2 annulate setae laterodistally; merus 1.7 times ischium length, with 1 short simple seta medially, 1 short simple and 1 annulate setae laterally; carpus 1.6 times merus length, with 1 short simple seta and 1 stout long simple seta with single subterminal simple seta on near medial distal corner, 3 short simple setae laterally; propodus 0.6 times carpus length, with 1 stout simple 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 short simple seta mediodistally, 1 long simple and 1 stout long simple setae terminally.

Uropod ( Fig. 7E ) peduncle 1.4 times pleotelson length, serrated on both margins, with 5–6 plumose and 23–26 microserrate setae medially, 13–14 short simple setae laterally. Uropod endopod uniarticulate, 0.6 times peduncle length, serrated on medial margin, with 0–1 pedunculate, 0–1 complex pedunculate setae, and 13–15 stout microserrate setae with single subterminal setule medially, 1–2 complex pedunculate and 2 short simple setae laterally, 2 stout microserrate setae with single subterminal setule terminally. Uropod exopod subequal to endopod length, article 1 unarmed; article 2 with 8–9 plumose setae medially, 3–6 short simple setae laterally, 2 simple and 2 microserrate setae terminally.

Etymology. The new species is named paraspinifera from the Latin para, meaning like, in reference to the similarity of this species to the Bodotria spinifera .

Remarks. This new species Bodotria paraspinifera sp. nov. is similar to B. carinata Gamô, 1964 and B. spinifera Gamô, 1986 in the combination of the following features: 1) dorso-lateral carina of carapace well-developed; 2) carapace almost rectangular in dorsal view; 3) carpus of pereopod 1 dilated; 4) pereopod 2 without ischium, dactylus longer than propodus; 5) uropod endopod uniarticulate. However, B. carinata is different from B. paraspinifera sp. nov. and B. spinifera , because body not covered with spinule. Also, the new species is obviously distinguished from B. spinifera by a combination of the following features ( B. spinifera condition in parentheses): 1) body covered with numerous spinules (vs. partly spinulose and covered with minute reticulated patterns); 2) anterior portion of carapace gradually narrows forward at about 1/5 (vs. suddenly narrows forward at about 1/4); 3) dorso-lateral carina with marginal spinules on entire length of the carapace (vs. with marginal spines runs along entire length of the carapace except at the anterior portion); 4) basis of pereopod 1 with numerous small tubercles in rows on medial surface, exopod 6-segmented (vs. with several tubercles in two rows on its medial surface, exopod 8-segmented); 5) carpus of pereopod 1 nearly subequal to ischium and merus combined, shorter than 1/3 as wide as its length (vs. carpus nearly twice as long as ischium and merus combined, 1/3 as wide as its length); 6) uropod peduncle serrated on both margins, with 55–68 short simple setae (vs. uropod peduncle serrate on both margins, without short simple seta in figure and manuscript); 7) uropod endopod about 1/2 as long as peduncle, with 11–13 short simple and 1 complex pedunculate setae (vs. about 3/4 as long as peduncle, without short simple and complex pedunculate setae in figure and manuscript). This new species was collected from the shallow coastal waters (8-10 m). However, B. spinifera was collected from the depth over than 100 m.

Distribution. Korea (Geomun Island).

Figures

FIGURE 1. Bodotria paraspinifera sp. nov., holotype, marsupial female, 7.07 mm: A, lateral view; B, cephalothorax, dorsal view. Paratype, adult male, 7.56 mm: C, lateral view; D, cephalothorax, dorsal view. Scale bars = 1.0 mm (A, C), 0.5 mm (B, D).

FIGURE 2. Bodotria paraspinifera sp. nov., holotype, marsupial female, 7.07 mm: A, habitus, lateral view; B, cephalothorax, dorsal view; C, antenna 1; D, right mandible; E, left mandible; F, maxilla 1; G, maxilla 2. Scale bars = 1.0 mm (A, B), 0.1 mm (C–G).

FIGURE 3. Bodotria paraspinifera sp. nov., holotype, marsupial female, 7.07 mm: A, maxilliped 1; B, maxilliped 2; C, maxilliped 3; D, pereopod 1; E, pereopod 2. Scale bars = 0.2 mm (C–E), 0.1 mm (A, B).

FIGURE 4. Bodotria paraspinifera sp. nov., holotype, marsupial female, 7.07 mm: A, pereopod 3; B, pereopod 4; C, pereopod 5; D, pleotelson. Scale bars = 0.3 mm (D), 0.2 mm (A–C).

FIGURE 5. Bodotria paraspinifera sp. nov., paratype, adult male, 7.53 mm: A, carapace, lateral view; B–D, carapace, dorsal view. Scale bars = 500 μm (A, B), 250 μm (C, D).

FIGURE 6. Bodotria paraspinifera sp. nov., paratype, adult male, 7.56 mm: A, habitus, lateral view; B, cephalothorax, dorsal view; C, antenna 1; D, antenna 2; E, maxilliped 3; F, pereopod 1. Scale bars = 1.0 mm (A, B), 0.2 mm (D–F), 0.1 mm (C).

FIGURE 7. Bodotria paraspinifera sp. nov., paratype, adult male, 7.56 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).