Coronatella (Coronatella) rectangula (Sars, 1962)

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 : 519

Coronatella (Coronatella) rectangula (Sars, 1962)

Figs (9I-O)

Sars, 1861: 18 ( Alona ( Lynceus )); P. E. Muller, 1867: 178, Pl. IV, fig. 3, 4 ( Alona lineata ), 181, Pl. IV, fig. 8,9 ( Alona guttata ); Hudendorff, 1876: 53, Pl. II, fig. 5 ( Alona inornata ); Hellich, 1874: 219 ( Alona pulchra ); Kurz, 1875: 54-55, Pl. II, Fig. 4-6 ( Alona coronata ); Hellich, 1877: 93-94, fig. 51 ( Alona lineata ); Stingelin, 1895: 249-250, pl. VII, Fig. 36 ( Alona pulchra ), 250, pl. VII, fig. 37 ( Alona richardi ); Lilljeborg, 1900: 476-482, Pl. LXVIII, fig. 30, 31, Pl. LXIX, fig. 1, 4-6 ( Lynceus rectangulus ); Herbst, 1962: 88-89, Fig. 67 ( Alona ); Šramek-Husek et al., 1962: 346-347, Fig. 128, A-F ( Alona ); Smirnov, 1971: 346-349, Fig. 391-395 ( Alona rectangula rectangula ); Flössner 1972: 314-316, Fig. 149 ( Alona ); Chiang & Du, 1979: 224-225, Fig. 153 ( Alona ); Idris, 1983: 119, Fig. 56 ( Alona cf. rectangula ); Negrea, 1983: 285-288, Fig. 116 ( Alona ); Margaritora, 1985: 298-301, Fig. 117 ( Alona ); Frey, 1988 a: 1387-1400, fig. 1-56 ( Alona ); Sars, 1993: 137, Pl. 99, Fig. 5-9 ( Alona lineata ); Alonso 1996: 313-315, Fig. 140 ( Alona ); Smirnov 1996: 15-17, Fig. 107-116 ( Alona rectangula pulchra ); Sinev, 2001: 83-86, Fig. 1-8 ( Alona ); Flossner, 2000: 300-303, Fig. 111 ( Alona ); Van Damme & Dumont, 2008a: 10-15, Fig. 3-4 , 10D; Hudec, 2010: 322-335, Fig. 82 ( Alona ); Sinev, 2016: 467, Fig. 9 E-H.

Material examined here. 6 parthenogenetic females from Lukie lake, Poleski Park Narodowy, Lublin Area, Poland, 02.07.2011, coll A.Y. Sinev & I. Zawiska; over 50 parthenogenetic females, 10 ephippial females, 5 males from Nizhnee Ershovskoe lake, White Sea Biological Station of Moscow State University, Republic of Karelia, Russia, 08-09.1996, coll. E. I. Izvekova, A. Y. Sinev; 20 parthenogenetic females, ephippial female, 7 males from Nero lake , Yaroslavl Area, Russia, 15.IX.1987, from N. N. Smirnov’s collection; over 30 parthenogenetic females from pond #1 on Gnilichka river, Nizhnii Novgorod, Russia, 29.07.2018, coll . V. S. Zhikharev; 17 parthenogenetic females, 2 males from pond near 9 th Dachnaja street, Saratov, Russia, 09-10.1998, coll. E. E. Morozova ; over 30 parthenogenetic females lake at Arylakh village , Yakutia Autonomous Republic, Russia, N 62.44764° N, 130.9635° E, 30.8.2010, coll. A.A.Kotov , AAK 2011-057; over 100 parthenogenetic and ephippial females, over 50 males from pond in Avangard village , Nakhodka District, Primorsky Area, Russia, 13.X.1999, leg. E.N. Temereva.

Material examined earlier. See list of material in Sinev (2001). Morphology of studied specimens (see Fig. 9 ) agrees with the earlier descriptions of the species ( Frey 1988; Alonso 1996; Sinev, 2001; Van Damme & Dumont 2008a; Hudec, 2010). Additional seta near scraper 1 of limb II ( Fig. 9C ) was found in all studied populations, and lateral aestetascs on male antennule ( Fig. 9E ) was found in all studied populations with males present.

Area of distribution. Palaearctic and Oriental regions. Records of C. (C.) rectangula in Subsahel Africa, Arabia and Central Asia should be rechecked due to presence of sibling species, C. (C.) cf. bukobensis and C. (C.) anemae (see Van Damme & Dumont 2008), and also C. (C.) hardingi . Records from Australia need also to be rechecked. Recorded from New Zealand and Australia C. (C.) novae-zelandiae is very similar to C (C.) rectangula in outer morphology, but description of its limbs ( Smirnov 1971) leaves no doubts that it is a separate species, clearly different from C. (C.) rectangula in morphology of IDL setae.

Figures

FIGURE 1. Coronatella (Ephemeralona) elegans (Kurz, 1875) comb. nov. from Laguna de El Hito, Cuenca, Castilla La Mancha, Spain. A-C, juvenile female of instar I. A, lateral view. B, head shield. C, head pores. D, juvenile female of instar II. E-M, adult parthenogenetic female. E-F, lateral view. G, ventral margin of valves. H, ventral margin of valves, setae of posterior group. I, posteroventral angle of valves. J-K, head shield. L-M, head pores. N, ephippial female. O-P, juvenile males of instar I and II. Q, adult male.

FIGURE 2. Coronatella (Ephemeralona) elegans (Kurz, 1875) comb. nov. from Laguna de El Hito, Cuenca, Castilla La Mancha, Spain. A-G, adult parthenogenetic female.A, lateral view. B, dorso-lateral view. C, sculpture of valves. D, head pores. E, postabdomen. F, postanal margin of postabdomen. G, antenna. H-I, ephippial female. H, lateral view. I, sculpture of ephippium.

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 5. Coronatella (Ephemeralona) elegans (Kurz, 1875) comb. nov. from Mainzer Sand, Germany. A-C, adult parthenogenetic female. A, lateral view. B, postabdomen. C, IDL and ODL of thoracic limb I. D-G, adult male..D, lateral view. E, postabdomen. F, frontal part of thoracic limb I (copulatory brush seta not shown). G, IDL of thoracic limb I.

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.

FIGURE 9. A-H, Coronatella (Coronatella) circumfimbriata (Megard, 1967) from forest pond at south side of Federal Road 1, 5 miles West from Wiscasset, Maine, USA. A-B, adult parthenogenetic female.A, IDL and ODL of thoracic limb I. B, exopodite and distal scrapers of limb II. C-H, adult male. C, lateral view. D, posteroventral corner of valves. E, postabdomen. F, antennule. G, thoracic limb I (copulatory brush seta not shown). H, copulatory hook and IDL of thoracic limb I. I-O, Coronatella (Coronatella) rectangula (Sars, 1861) from pond near 9th Dachnaja street, Saratov, Russia. I-K, adult parthenogenetic female. I, postabdomen. J, IDL and ODL of thoracic limb I. K, exopodite and distal scrapers of limb II. L-O, adult male. L, postabdomen. M, antennule. N, thoracic limb I (copulatory brush seta not shown). O, copulatory hook and IDL of thoracic limb I.