Korealona choi, Jeong & Sinev & Brancelj & Chang & Kotov, 2017

Jeong, Hyun Gi, Sinev, Artem Y., Brancelj, Anton, Chang, Kwang-Hyeon & Kotov, Alexey A., 2017, A new blind groundwater-dwelling genus of the Cladocera (Crustacea: Branchiopoda) from the Korean Peninsula, Zootaxa 4341 (4), pp. 451-474 : 462-468

publication ID

https://doi.org/ 10.11646/zootaxa.4341.4.1

publication LSID

lsid:zoobank.org:pub:BEB2E2B5-5FF9-4EF0-913A-C0C507F258DF

DOI

https://doi.org/10.5281/zenodo.6024582

persistent identifier

https://treatment.plazi.org/id/039C87CC-FFE7-E23D-42A5-D832FE9EFAB4

treatment provided by

Plazi

scientific name

Korealona choi
status

gen. nov.

Korealona choi gen. nov., sp. nov.

( FIGS 8–13 View FIGURE 8 View FIGURE 9 View FIGURE 10 View FIGURE 11 View FIGURE 12 View FIGURE 13 )

Etymology. THIS SPEcIES IS DEDIcATED TO PROF. J.L. CHO, RENOWNED SPEcIALIST FOR THE BATHYNELLAcEAE, WHO cOLLEcTED THE TYPE SERIES OF THE SPEcIES.

Type locality. A SAND bANK (35.2011ºN, 127.6010ºE) IN NAESEOcHEON STREAM (cHEON = STREAM), AN AFFLUENT OF RIVER SEUMJINGANG, JEOLLANAM-DO, SOUTH KOREA (LOcALITY 4 IN FIG. 1 View FIGURE 1 ). THE TYPE SERIES WAS cOLLEcTED bY J.L. CHO.

Type material. Holotype. A PARTHENOGENETIc FEMALE, NIBR 0 0 0 0 307404.

Paratype. A PARTHENOGENETIc FEMALE FROM TYPE LOcALITY, NIBRIV0000740010.

Additional material (expressly excluded from the type series according to case 72.4.6. of ICZN 2000 ). TWO PARTHENOGENETIc FEMALES AND MALE EXUVIUM FROM YEOcHOEN: A SAND bANK OF NAESEONGcHEON STREAM (36.58028ºN, 128.33000ºE), GYEONGSANGbUK-DO, SOUTH KOREA; cOLLEcTED bY J.L. CHO; HGJ, NO NUMbER (LOcALITY 5 IN FIG. 1 View FIGURE 1 ). GoogleMaps

ENVIRONMENTAL PARAMETERS: WATER TEMPERATURE,18.0o C; PH, 7.35; cONDUcTIVITY, 251µS cM -1; DISSOLVED OXYGEN, 5.26 MG L -1. TEN PARTHENOGENETIc FEMALES FROM ULJIN : A SANDY DEPOSIT OF NAMDAEcHEON STREAM (36.71944ºN, 129.3972ºE), GYEONGSANGbUK-DO, SOUTH KOREA; cOLLEcTED bY J.L. CHO; HGJ, NO NUMbER (LOcALITY 6 IN FIG. 1 View FIGURE 1 ) GoogleMaps . ENVIRONMENTAL PARAMETERS: WATER TEMPERATURE, 14.9o C; PH, 6.98; cONDUcTIVITY, 116 µS cM -1, DISSOLVED OXYGEN, 9.12 MG L -1.

Short description with special attention to differences from previous species. Parthenogenetic female. Habitus SIMILAR TO K. karanovici sp. nov. bUT bODY SOMEWHAT HIGHER (HEIGHT/LENGTH 0.65–0.70) AND WIDER ( FIG. 8A– C View FIGURE 8 , 9A, B View FIGURE 9 ); GAP bETWEEN VALVES MORE OPEN AS cOMPARED WITH K. karanovici sp. nov., POSTERO-DORSAL ANGLE MORE EXPRESSED.

Head. HEAD SHIELD, HEAD PORES ( FIG. 8D, E View FIGURE 8 ; 9C–F), VALVES ( FIG. 8C, F View FIGURE 8 ; 10A, B) AS IN THE PREVIOUS SPEcIES . LAbRUM WITH A SERIES OF MINUTE SETULAE AT TIP ( FIG. 9G, H View FIGURE 9 , ARROW).

Postabdomen. SHAPE AND ARMATURE SAME AS IN THE PREVIOUS SPEcIES ( FIG. 8G–I View FIGURE 8 ; 10C–E). POSTAbDOMINAL cLAW SIMILAR TO THAT IN PREVIOUS SPEcIES, bUT bASAL SPINE SHORTER, ITS LENGTH LESS THAN HALF cLAW LENGTH ( FIG. 8G–I View FIGURE 8 ; 10F–H).

Antenna I WITH SENSORY SETA NOT REAcHING TIP OF ANTENNULAR bODY ( FIG. 9E View FIGURE 9 ).

Antenna II SAME AS IN THE PREVIOUS SPEcIES ( FIG. 8D, J View FIGURE 8 ; 11A–D), bUT SPINE ON PROXIMAL SEGMENT OF EXOPOD bIFURcATED ( FIG. 11C View FIGURE 11 ).

Limb I ( FIG. 12A View FIGURE 12 ) AS IN THE PREVIOUS SPEcIES, bUT AccESSORY SETA LONGER, REAcHING DISTAL END OF ODL; ODL SETA AS LONG AS IDL SETA ( FIG. 12 B View FIGURE 12 ).

Limb II ( FIG. 12C View FIGURE 12 ) WITH EXOPODITE LAcKING A SETA; ScRAPERS 1–2 LONGER THAN ScRAPERS 3–5; GNATHObASE DISTAL bOUNDARY STRONGLY INFLATED, SETAE OF FILTER PLATE INcREASING IN LENGTH.

Limb III ( FIG. 12D View FIGURE 12 ) WITH EXOPODITE SETA 3 LONGER THAN IN PREVIOUS SPEcIES; POSTERIOR SETAE A–D ON INNER-DISTAL LIMb PORTION SUbEQUAL IN SIZE; ALL SETAE OF GNATHObASE FILTER PLATE SUbEQUAL IN SIZE.

Limb IV ( FIG. 12E View FIGURE 12 ) EXOPODITE WITH SETA 2 bEING LONGEST; SETAE 1 AND 4–6 OF SIMILAR LENGTH, AbOUT 2/3 LENGTH OF SETA 2; POSTERIOR SETAE A–c SUb-EQUAL IN SIZE ( FIG. 12F View FIGURE 12 )..

Limb V ( FIG. 12G View FIGURE 12 ) EXOPODITE HAVING SETAE 2–4 VERY SHORT, OF SIMILAR LENGTH AND ONLY SLIGHTLY LONGER THAN SETA 1; INNER LObE MORE ELONGATED THAN IN THE PREVIOUS SPEcIES; SETA 1 ON IT WITH ARMATURE AS IN SETA 2 .

Juvenile female, ephippial female. NOT FOUND.

Male. ONLY AN EXUVIUM WAS FOUND, THEREFORE SOME STRUcTURES WERE NOT STUDIED. IN cONTRAST TO PREVIOUS TAXON, MALE SHAPE ( FIG. 13F View FIGURE 13 ) IS SIMILAR TO FEMALE ( FIG. 13A–E View FIGURE 13 ); POSTAbDOMEN SUb-REcTANGULAR, WITH SMALL MARGINAL POSTANAL TEETH AND bUNcHES OF SETULAE ON POSTANAL AND ANAL MARGIN ( FIG. 13G View FIGURE 13 ). POSTAbDOMINAL cLAW STRONG AND LONG ( FIG. 13H View FIGURE 13 ); TIP OF cOPULATORY HOOK THIN AND SHARP ( FIG. 13I View FIGURE 13 ).

Size. FEMALE 0.23–0.28 (NAESEOcHEON), 0.22–0.28 (YEcHEON), 0.23–0.28 (ULJIN), 0.23–0.34 MM (NAESEONGcHEON); MALE 0.31 MM (NAESEONGcHEON).

Distribution. THE SPEcIES IS FOUND IN JEOLLANAM-DO AND cENTRAL PORTION OF GYEONGSANGbUK-DO PROVINcES OF SOUTH KOREA.

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