Bodotria jejuensis, Lee, Chang-Mok, Kim, Sung-Hyun & Kim, Young-Hyo, 2016

Lee, Chang-Mok, Kim, Sung-Hyun & Kim, Young-Hyo, 2016, Bodotria jejuensis sp. nov. (Crustacea, Cumacea, Bodotriidae), a new Korean cumacean, Zootaxa 4161 (3), pp. 357-366 : 358-363

publication ID	https://doi.org/ 10.11646/zootaxa.4161.3.4
publication LSID	lsid:zoobank.org:pub:856A17E7-4085-440D-BB2D-DC7D5DE26825
DOI	https://doi.org/10.5281/zenodo.6076142
persistent identifier	https://treatment.plazi.org/id/0396D76C-8F29-6A6B-FF01-FD8E8937EEB2
treatment provided by	Plazi
scientific name	Bodotria jejuensis
status	sp. nov.

Treatment

Bodotria jejuensis sp. nov.

(Korean Name: Je-ju-cham-ol-chaeng-i-sae-u, new) ( Figs. 1–5 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 View FIGURE 5 )

Type material. Holotype, adult male, 4.7 mm, cat no. NIBRIV0000416869, Port Seongsanpo, Seongsanri-ri, Seongsan-eup , Seogwipo-si , Jeju-do Is., 33° 28′ 25″N, 126° 55′ 50″E, 7 May 1994, (B.J. Kang) collected by light trap GoogleMaps . Paratypes, 1 adult female cat no. NIBRIV0000416870, data same as holotype (dissected); and the remaining paratypes 58 ♂, 20 ♀ GoogleMaps , data same as holotype GoogleMaps .

Additional material examined: 1 ♀, Port Hwasun, Hwasun-ri, Andeok-myeon , Seogwipo -si, Jeju-do Is., 33° 14′ 10″N, 126° 19′ 57″E, 8 Aug. 1998, (Y.H. Kim) by light trap GoogleMaps ; 17 ♂, 2 ♀, Port Sinyang, Sinyang-ri, Chujamyeon , Jeju-si , Jeju-do Is., 33° 56′ 27″N, 126° 19′ 31″E, 10 Aug. 1998, (Y.H. Kim) by light trap GoogleMaps ; 15 ♂, Port Hanlim, Hanlim-ri, Hanlim-eup , Jeju-si , Jeju-do Is., 33° 25′ 05″N, 126° 15′ 38″E, 11 Aug. 1998, (Y.H. Kim) by light trap GoogleMaps ; 5 ♂, Port Sehwa, Sehwa-ri, Pyoseon-myeon , Seogwipo-si , Jeju-do Is., 33° 31′ 49″N, 126° 51′ 27″E, 12 Aug. 1998, (Y.H. Kim) by light trap. GoogleMaps

Etymology. The new species name jejuensis is from the locality name of collection ‘ Jeju-do Island’.

Description. Holotype adult male, 4.7 mm, cat no. NIBRIV0000416869.

Body ( Fig. 1 View FIGURE 1 A) about 4.7 mm long, excluding uropods. Carapace ( Figs. 1 View FIGURE 1 A, B) about 1/4 of body length, almost longish elliptical in dorsal view, 1.65 times as long as its width, 1.75 times as long as its depth; surface covered with minutely reticulated patterns and sculptures pitted prominently at posterior portion. Dorso-median carina well-marked over whole length of carapace. Dorso-lateral carina well-developed. Lateral longitudinal ridge distinct, curved upwards posteriorly to merge with lateral carina. Antennal notch and antero-lateral corner ( Fig. 1 View FIGURE 1 A) prominent. Pseudorostral lobes ( Fig. 1 View FIGURE 1 B) broadly truncated and met in front of ocular lobe. Ocular lobe ( Fig. 1 View FIGURE 1 B) subtriangular, with 8 lenses. Each free thoracic segment covered with faintly pitted sculpture. Dorso-median carina elevated and lateral carina well-marked on all thoracic segments. Abdomen plump, 1.25 times as long as cephalothorax.

Antenna 1 ( Fig. 1 View FIGURE 1 C) peduncle 3-articulate; article 1 1.8 times as long as following articles combined, with several rows of numerous sensory hairs; article 3 1.3 times as long as second one, with 2 complex pedunculate setae on terminal margin. Main flagellum 2-articulate; article 1 with 1 short simple seta, 1 aesthetasc on outer corner; article 2 with 1 long aesthetasc, 1 short and 2 long simple setae on terminal margin; accessory flagellum very minute, with 5 short aesthetascs.

Antenna 2 ( Fig. 1 View FIGURE 1 A, D) elongate, extending beyond end of last abdominal segment; peduncle composed of 5 articles; articles 1, 2 with 1 and 2 plumose setae.

Labium ( Fig. 1 View FIGURE 1 E) with numerous hairs on inner margin; apex projection and seta absent.

Maxilla 1 ( Fig. 1 View FIGURE 1 F) outer endite with 4 simple, 1 microserrate, 5 stout simple and 4 bifurcated stout simple setae on terminal margin; outer margin with 1 simple seta distally; inner endite absent.

Maxilla 2 ( Fig. 1 View FIGURE 1 G) broad endite with a row of 20 simple setae on medial face, plumose, simple, stout pappose, and microserrate setae on terminal margin; outer endite with 7 pappose setae terminally; inner endite with simple setae terminally.

Maxilliped 1 ( Fig. 2 View FIGURE 2 A, B) basis subequal to the following articles combined, Carpus with 7 bifurcated simple and 12 simple setae medially. Propodus with 5 simple and 2 plumose setae distally, 1 plumose seta laterally. Dactylus with 2 simple setae terminally.

Maxilliped 2 ( Fig. 2 View FIGURE 2 C) basis 1.6 times as long as following articles combined. Maxilliped 3 ( Fig. 2 View FIGURE 2 D) basis 1.6 times as long as following articles combined, with numerous hairs on both margins; outer corner very inflated, reaching to the middle of merus, with 7 plumose setae; inner corner with 2 plumose setae.

Pereopod 1 ( Fig. 2 View FIGURE 2 E) basis 1.2 times as long as following articles combined, with 9 short simple setae and numerous hairs posteriorly, distal margin with 1 short and 1 long plumose setae. Carpus prominently dilated laterally, with 8 short simple and 1 simple setae. Propodus subrectangular, half length of carpus. Dactylus slender, 0.8 times as long as propodus.

Pereopod 2 ( Fig. 2 View FIGURE 2 F) basis fused with ischium, 1.2 times as long as following articles combined; anterior margin with 10 short simple setae and posterior margin with 2 plumose setae. Carpus subequal in length to merus with 3 microserrate setae posterodistally. Propodus 0.6 times as long as carpus. Dactylus 1.8 times as long as propodus.

Pereopod 3 ( Fig. 3 View FIGURE 3 A) basis 1.2 times as long as following articles combined. Merus 1.9 times as long as ischium. Carpus 1.4 times as long as merus. Propodus 0.6 times as long as carpus. Dactylus 0.5 times as long as propodus.

Pereopod 4 ( Fig. 3 View FIGURE 3 B) basis 0.9 times as long as following articles combined. Merus about twice as long as ischium. Carpus 1.4 times as long as merus. Propodus 0.5 times as long as carpus. Dactylus almost half as long as propodus.

Pereopod 5 ( Fig. 3 View FIGURE 3 C) basis 0.7 times as long as following articles combined. Merus 2.2 times as long as ischium. Carpus 1.4 times as long as merus, propodus 0.6 times as long as carpus. Dactylus 0.4 times as long as propodus.

Uropod ( Fig. 3 View FIGURE 3 D) peduncle strong, 1.8 times as long as last abdominal segment; inner margin serrate, with 6 plumose setae proximally, 20 pappose setae distally. Endopod unarticulate, inner margin serrate, and slightly longer than half of peduncle, with 12 short microserrate setae medially, 1 short microserrate and 1 microserrate setae terminally. Exopod 2-articulate, slightly longer than endopod; article 2 with 8 plumose setae medially, 1 short simple and 1 simple setae terminally.

Adult female, cat no. NIBRIV0000416870. Body ( Fig. 4 View FIGURE 4 A) about 4.5 mm long, excluding uropods. Carapace ( Fig. 4 View FIGURE 4 A, B) shape, sculptures, pattern of ridges almost same as male, about 1/4 of body, 1.3 times as long as width, 1.65 times as long as depth. Each free thoracic segment covered with faintly pitted sculpture. Dorso-median carina elevated and lateral carina well-marked on all segments. Abdomen slender, 1.3 times as long as cephalothorax.

Antenna 1 ( Fig. 4 View FIGURE 4 C) peduncle 3-articulate; article 3 1.4 times as long as second one, with 3 simple setae terminally. Main flagellum 2-articulate; article 2 with 2 long aesthetascs, 1 short and 2 long simple setae on terminal margin. Accessory flagellum very minute, with 1 complex pedunculate and 2 short simple setae.

Maxilliped 3 ( Fig. 4 View FIGURE 4 D) basis 1.4 times as long as following articles combined, with numerous hairs on both margins. Outer corner very inflated, reaching to about 1/2 of merus, with 8 plumose setae; inner corner with 2 plumose setae.

Pereopod 1 ( Fig. 4 View FIGURE 4 E) basis slightly longer than length of following articles combined, with 1 plumose seta on anterior corner and 1 long plumose seta on distal margin. Merus 2.7 times as long as ischium. Carpus prominently dilated laterally, with 6 short simple and 1 plumose setae. Propodus 0.4 times as long as carpus. Dactylus 0.9 times as long as propodus.

Pereopod 2 ( Fig. 4 View FIGURE 4 F) basis slightly curved, fused with ischium, 1.2 times as long as following articles combined, with 11 simple and 1 complex pedunculate setae. Carpus subequal in length to merus. Propodus 0.6 times as long as carpus. Dactylus 1.8 times as long as propodus.

Pereopod 3 ( Fig. 5 View FIGURE 5 A) basis rectangular, 1.3 times as long as following articles combined. Merus 1.9 times as long as ischium. Carpus subequal in length to merus. Propodus 0.7 times as long as carpus. Dactylus 0.4 times as long as propodus.

Pereopod 4 ( Fig. 5 View FIGURE 5 B) basis rectangular, 1.3 times as long as following articles combined. Merus 1.7 times as long as ischium. Carpus 1.3 times as long as merus. Propodus 0.6 times as long as carpus. Dactylus 0.4 times as long as propodus.

Pereopod 5 ( Fig. 5 View FIGURE 5 C) basis 0.6 times as long as following articles combined. Merus 1.8 times as long as ischium. Carpus 1.4 times as long as merus. Propodus 0.6 times as long as carpus. Dactylus 0.5 times as long as propodus.

Uropod ( Fig. 5 View FIGURE 5 D) peduncle subrectangular, 1.8 times as long as last abdominal segment, inner margin serrate. Endopod unarticulate, slightly longer than 1/2 of peduncle, inner margin serrate, with 6 short microserrate setae medially, 1 short microserrate and 1 microserrate setae terminally. Exopod 2-articulate, slightly longer than endopod; article 2 with 8 plumose setae medially, 1 short simple and 1 simple setae terminally.

Remarks. This new species Bodotria jejuensis sp. nov. is similar to B. similis Calman, 1907 , B. rugosa Gamô, 1963 , B. carinata Gamô, 1964 , and B. biplicata Gamô, 1964 which are distributed in Japanese waters, in having a pitted carapace and well-marked dorso-lateral carina. However, the new species is obviously distinguished from its congeners by a combination of the following features (based on list in Table 1): 1) carapace longish elliptical in dorsal view (vs. subquadrangular in B. carinata ); 2) carapace, lateral carina slightly curved, almost reaching end of posterior margin (vs. curved dorsally, reaching 2/3 length of carapace in B. rugosa and B. biplicata ; straight, near end of posterior margin in B. carinata ); 3) carapace, lateral longitudinal ridge distinct, curved upwards posteriorly to merge with lateral carina (vs. almost parallel to the lateral carina in B. rugosa , B. biplicata , and B. similis ; absent in B. carinata ); 4) dorsal carina of free thoracic segment moderately elevated (vs. strongly elevated in B. carinata and B. similis ); 5) free thoracic segment with well-marked lateral carina (vs. without lateral carina in B. biplicata ); 6) free thoracic segments 3–5 subquadrate in lateral view (vs. subtriangular in B. biplicata and B. similis ); 7) pereopod 1, carpus dilated laterally (vs. not dilated in B. rugosa , B. biplicata , and B. similis ); 8) pereopod 2, basis with 10 short simple, 1 simple, and 1 complex pedunculated setae in female (vs. serration in B. rugosa ; 4 plumose setae in B. biplicata ; 1 simple seta in B. carinata ; 4 plumose setae in B. similis ).

On the other hand, Gamô (1962) dealt with geographical and individual variation of Bodotria similis with male and female specimens (3.8–4.8mm) collected from Omai Zaki, Japan. They are also similar to B. jejuensis sp. nov in having the lateral ridge, laterally dilated carpus on pereopod 1, and relatively long uropod. However, the new species is obviously distinguished from B. smilis reported from Japanese waters by a combination of following features: 2) free thoracic segment lateral carina well-marked (vs. faintly marked in developing marsupium female); 1) carapace, lateral ridge well developed, curved upwards posteriorly to merge with lateral carina (vs. faint, almost parallel to the lateral carina in mature male, without lateral ridge in developing marsupium female); 3) pereopod 1, carpus dilated laterally (vs. not dilated in mature male); 4) free thoracic segment 3–5 subquadrate in lateral view (vs. subtriangular).

Distribution. Korea (Jeju-do Is., shallow water, 6m).