Biapertura ossiani herricki (Sinev, 2013)

Sinev, Artem Y., 2020, Re-evaluation of the genus Biapertura Smirnov, 1971 (Cladocera: Anomopoda Chydoridae), Zootaxa 4885 (3), pp. 301-335 : 326-327

Biapertura ossiani herricki (Sinev, 2013) comb. nov.

Daday 1905: 171–172, Pl. 10, Fig. 25–24 ( Alona affinis ); Sinev 2013: 330–335, Fig. 1–3 ( Alona ).

Type locality. Sebago Lake , Cumberland county, Maine, USA .

Type material. Holotype (parthenogenetic female), allotype (adult male) and paratypes (over 30 females and 5 males) at National Museum of Natural History (Washington DC, USA), access numbers 1207845, 1207846, 1207847 respectively.

Diagnosis. Male postabdomen ( Fig. 16L ) with 1–3 composite marginal denticles near the postanal angle.

Differential diagnosis. Biapertura ossiani herricki comb. nov. differs from nominative subspecies in the presence of 1–3 marginal denticles on postanal angle of male postabdomen.

Distribution: Canada, USA, Paraguay (Sinev 2013), probably invasive populations are also found in South Korea ( Kotov et al. 2018).

Figures

FIGURE 1. Biapertura affinis (Leydig, 1860) from Glubokoe Lake, Moscow Area, Russia.A–K, adult parthenogenetic female. A, lateral view. B–C, posteroventral angle of valves. D, head shield. E, head pores. F, labrum. G, postabdomen. H, postanal margin of postabdomen. I, postabdominal claw. J, antennule. K, antenna. L, ephippial female. M–O, adult male. M, lateral view. N, postabdomen. O, postabdominal claw. (A–L, orig.; M–O, after Sinev et al. 2020)

FIGURE 2. Biapertura affinis (Leydig, 1860) from Glubokoe Lake, Moscow Area, Russia. A–B, lateral view. C, dorsolateral view. D, dorsal view. E, ventral view. F, frontal view. G, ventral part of valve. H, postabdomen. I, postabdominal claw. J, antenna.

FIGURE 3. Biapertura affinis (Leydig, 1860) from Glubokoe Lake, Moscow Area, Russia, parthenogenetic female.A–B, head pores. C–E, posterior dorsal pores.

FIGURE 16. Biapertura ossiani herricki (Sinev, 2013).A–I, adult parthenogenetic female.A, lateral view. B–C, posteroventral angle of valves. D, head pores. E, postabdomen. F, postanal margin of postabdomen. G, postabdominal claw. H, antenna. I, IDL of thoracic limb. J, ephippial female. K–M, adult male. K, lateral view. L, postabdomen. M, copulatory hook and IDL of thoracic limb I. Biapertura ossiani ossiani (Sinev 1998). N–O, adult male. N, lateral view. O, postabdomen. (A–M, after Sinev, 2013; N–O, after Sinev, 1998).