Coronatella (Ephemeralona) elegans lebes ( Dumont & Van De Velde, 1975 )

Sinev, Artem Y., 2020, Revision of the elegans-group of Alona s. lato and its status as a subgenus of Coronatella Dybowski & Grochowski, 1894 (Cladocera: Anomopoda Chydoridae), Zootaxa 4732 (4), pp. 501-526 : 511

Coronatella (Ephemeralona) elegans lebes ( Dumont & Van De Velde, 1975) comb. nov.

( Figs 6-8 )

Dumont & Van De Velde, 1975: 140-143, Fig. 3-4 ( Alona ).

Type locality: Desert zone between the lower Dra valley ( South Morocco) and the Adrar mountains ( North Mauritania) .

According to Dumont & Van De Velde (1975), this subspecies differs from the nominative one by “ the conspicuously large ocellus”. Indeed, althouth the size of ocellus is rather variable in all studied populations of C. (E.) elegans elegans , it was never as large as reported for C. (E.) elegans lebes . But the main difference of this subspecies is the longer spine on the basal segment of the antennal exopodite, being significantly longer than middle segment itself ( Dumont & Van De Velde 1975, Fig. 4A ), such situation was never found in the nominative subspecies. Study of limbs of this form was never conducted.

Figures

FIGURE 3. Coronatella (Ephemeralona) elegans (Kurz, 1875) comb. nov. from Laguna de El Hito, Cuenca, Castilla La Mancha, Spain. A-D, adult parthenogenetic female. A, labrum. B-C, postabdomen. D, antennule. E-F, antenna. G, juvenile male of instar I, postabdomen. H-I, juvenile male of instar II. H, postabdomen. I, antennule. J-L, adult male. J, postabdomen. K, postabdominal claw. L, antennule.

FIGURE 4. Coronatella (Ephemeralona) elegans (Kurz, 1875) comb. nov. from Laguna de El Hito, Cuenca, Castilla La Mancha, Spain. A-I, thoracic limbs of adult parthenogenetic female.A-B, limb I. C, limb II. D, exopodite of limb III. E-F, inner portion endite of limb III. G, exopodite of limb IV. H, inner portion of limb IV. I, limb V. J, juvenile male of instar I, inner side of thoracic limb I. K, juvenile male of instar II, inner side of thoracic limb I. L-M, thoracic limb I of adult male.

FIGURE 6. Coronatella (Coronatella) cf. bukobensis (Weltner, 1897) from Dune Pan, near Road 27, North of Blauwbergstrand, Cape Town, Republic of South Africa. A-B, juvenile females of instar I and II. C-I, adult parthenogenetic female. C, lateral view. D, ventral margin of valves. E, posteroventral angle of valves. F, head shield. G, head pores. H-I, postabdomen, J, antennule. K, ephippial female. L-O, adult male. L, lateral view. M, postabdomen. O, antennule.

FIGURE 7. Coronatella (Coronatella) cf. bukobensis (Weltner, 1897) from Dune Pan, near Road 27, North of Blauwbergstrand, Cape Town, Republic of South Africa, adult parthenogenetic female. A-B, lateral view. C, dorso-lateral view. D, postabdomen. E, postanal margin of postabdomen. F, postabdominal claw. G, antenna. H, setae of IDL of limb I.

FIGURE 8. Coronatella (Coronatella) cf. bukobensis (Weltner, 1897) from Dune Pan, near Road 27, North of Blauwbergstrand, Cape Town, Republic of South Africa.A-L, adult parthenogenetic female. A, labrum. B, antenna, C-D, limb I. E, limb II. F, exopodite of limb III. G-H, inner portion endite of limb III. I, exopodite of limb IV. J-K, inner portion of limb IV. L, limb V. M-O, adult male. M, thoracic limb I. N-O, IDL setae and copulatory hook of thoracic limb I.