Korealona choi Jeong & Sinev & Brancelj & Chang & Kotov 2017, gen. nov., sp. nov.
Creators: name: Jeong, Hyun Gi
name: Sinev, Artem Y.
name: Brancelj, Anton
name: Chang, Kwang-Hyeon
name: Kotov, Alexey A.
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Bathynellacea
Bathynellidae
Korealona
Korealona choi

description: Korealona choi gen. nov., sp. nov.
(FIGS 8–13)
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). 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).
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). 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, 9A, B); 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; 9C–F), VALVES (FIG. 8C, F; 10A, B) AS IN THE PREVIOUS SPEcIES. LAbRUM WITH A SERIES OF MINUTE SETULAE AT TIP (FIG. 9G, H, ARROW).
Postabdomen. SHAPE AND ARMATURE SAME AS IN THE PREVIOUS SPEcIES (FIG. 8G–I; 10C–E). POSTAbDOMINAL cLAW SIMILAR TO THAT IN PREVIOUS SPEcIES, bUT bASAL SPINE SHORTER, ITS LENGTH LESS THAN HALF cLAW LENGTH (FIG. 8G–I; 10F–H).
Antenna I WITH SENSORY SETA NOT REAcHING TIP OF ANTENNULAR bODY (FIG. 9E).
Antenna II SAME AS IN THE PREVIOUS SPEcIES (FIG. 8D, J; 11A–D), bUT SPINE ON PROXIMAL SEGMENT OF EXOPOD bIFURcATED (FIG. 11C).
Limb I (FIG. 12A) AS IN THE PREVIOUS SPEcIES, bUT AccESSORY SETA LONGER, REAcHING DISTAL END OF ODL; ODL SETA AS LONG AS IDL SETA (FIG. 12 B).
Limb II (FIG. 12C) 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) 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) 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)..
Limb V (FIG. 12G) 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) IS SIMILAR TO FEMALE (FIG. 13A–E); POSTAbDOMEN SUb-REcTANGULAR, WITH SMALL MARGINAL POSTANAL TEETH AND bUNcHES OF SETULAE ON POSTANAL AND ANAL MARGIN (FIG. 13G). POSTAbDOMINAL cLAW STRONG AND LONG (FIG. 13H); TIP OF cOPULATORY HOOK THIN AND SHARP (FIG. 13I).
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.
description: Published as part of 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, pp. 451-474 in Zootaxa 4341 (4) on pages 462-468, DOI: 10.11646/zootaxa.4341.4.1, http://zenodo.org/record/1040495