Acroperus africanus Neretina & Kotov, 2015

Sinev, Artem Y., Dadykin, Ivan A., Umi, Wahidah A. D. & Yusoff, Fatimah M., 2025, New data on Cladocera (Crustacea: Branchiopoda) of Peninsular Malaysia, Zootaxa 5604 (3), pp. 255-284 : 262-264

publication ID	https://doi.org/10.11646/zootaxa.5604.3.3
publication LSID	lsid:zoobank.org:pub:C8E5E697-223C-45A0-A104-134328213586
DOI	https://doi.org/10.5281/zenodo.15046323
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scientific name	Acroperus africanus Neretina & Kotov, 2015
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Fig. 5 View FIGURE 5

Idris 1983: 128–130, Fig. 61 ( harpae ); Neretina & Kotov 2015: 517–524, Figs. 1–5 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 View FIGURE 5 ; Sinev 2016: 457, Figs. 5A–D View FIGURE 5 ; Kotov et al. 2017: 238–240, Fig. 8 View FIGURE 8 .

Material examined. Several parthenogenetic females from Chini Lake , Pahang (3,43224° N, 102,92225° E), 19.10.2013 GoogleMaps ; numerous parthenogenetic females, and one male from several locations at Bera Lake , Pahang, 01.02.2018 .

Acroperus africanus was described based on the material from Ethiopia and the Republic of South Africa ( Neretina & Kotov 2015). Later,the species was found in South Korea ( Kotov et al. 2017) and North-East Thailand (Sinev 2016; Tiang-nga et al. 2020). Earlier records of Acroperus from South-East Asia, including Malaysia ( Idris 1983), were attributed to A. harpae ( Korovchinsky 2013) , but their morphology was never studied in details. Acroperus harpae and A. africanus clearly differ in morphology of the antenna and male postabdomen.

Morphology of the studied parthenogenetic females fully agree with that from the description of A. africanus (see Neretina & Kotov 2015), including body of moderate height for the genus and moderately developed head keel ( Fig. 5A View FIGURE 5 ), small closely spaced denticles on posteroventral angle of valves ( Fig. 5B View FIGURE 5 ), postabdomen morphology typical of the genus ( Fig. 5C View FIGURE 5 ), antennal branches of similar length, presence of a short seta on basal segment of antennal exopodite, and uniform apical setae ( Fig. 5D View FIGURE 5 ). Prior to our study, males of A. africanus have been known only for Korean populations ( Kotov et al. 2017), while males from Africa have never been described. Studied male from Malaysia slightly differs from the South Korean specimens in shape of its postabdomen, the latter have somewhat broader posterior portion (see Kotov et al. 2017, Fig.8L View FIGURE 8 ), but this difference can be explained by an interspecies variability. Idris (1983) described outer morphology and the shape of postabdomens of both male and female of Acroperus from Malaysia, male morphology is the same as in studied material. For detailed description of female see Neretina & Kotov (2015).

References

Idris, B. A. G. (1983) Freshwater zooplankton of Malaysia (Crustacea: Cladocera). Universiti Pertanian Malaysia Press, Serdang, Selangor, 153 pp.

Korovchinsky, N. M. (2013) Cladocera (Crustacea: Branchiopoda) of South-East Asia: history of exploration, taxon richness and notes on zoogeography. Journal of Limnology, 72 (S 2), 109-124. https://doi.org/10.4081/jlimnol.2013.s2.e7

Kotov, A. A., Sinev, A., Garibian, P. G., Neretina, A. N., Jeong, K. - S., Chae, G. - S., & Min, G. - S. (2017) Recent progress in studies of the Cladocera (Crustacea: Branchiopoda) of South Korea with seven new records for the Korean Peninsula. Journal of Species Research, 6 (Special Edition), 227-246.

Neretina, A. N. & Kotov, A. A. (2015) A new species of Acroperus Baird, 1843 (Cladocera: Chydoridae) from Africa. Zootaxa, 4039 (4), 516-528. https://doi.org/10.11646/zootaxa.4039.4.2

Tiang-Nga, S., Sinev, A. Y. & Sanoamuang, L. (2020) High diversity of Cladocera (Crustacea: Branchiopoda) in a Ramsar site Lake Kud - Thing, Northeast Thailand. Zootaxa, 4780 (2), 275-290. https://doi.org/10.11646/zootaxa.4780.2.3

Figures

FIGURE 1. Simocephalus (Echinocaudus) exspinosus (De Geer, 1778) from pond at Permai Lake, Ipoh, Perak, Malaysia, parthenogenetic female. A, lateral view. B, postabdomen, С, postabdominal claw from outer side. D, basal portion of postabdominal claw from outer side. E, group of pigmented hypoderm cells on valves. Simocephalus (Simocephalus) mixtus Sars, 1903 pond at the Permai Lake, Ipoh, Perak, Malaysia, F, lateral view. G, head. H, posteroventral angle of valves. I, postabdomen. J, basal portion of postabdominal claw from outer side.

FIGURE 2. Streblocerus spinulatus Smirnov, 1992 from Chini Lake, Pahang, Malaysia, parthenogenetic female. A, lateral view. B, dorsal view. C, ventral view. D, head in ventral view. E, antennule. F, postabdomen.

FIGURE 3. Bosmina (Sinobosmina) fatalis Burckhardt, 1924 from Putrajaya Wetland, Putrajaya, Malaysia, parthenogenetic female.A, lateral view.B, posteroventralangle of valves.C, baseof antenna andlateral pore (indicated by arrow).D, postabdomen. Bosmina (Liederobosmina) meridionalis Sars, 1904 from Bukit Merah reservoir, Perak, Malaysia, parthenogenetic female. E, lateral view. F, posteroventral angle of valves. G, base of antenna and lateral pore. H, postabdomen.

FIGURE 4. Bosmina (Sinobosmina) fatalis Burckhardt, 1924 from Putrajaya Wetland, Putrajaya, Malaysia, parthenogenetic female. A, lateral view. B, bases of antennule in frontal view, frontal head pore indicated by arrow. Bosmina (Liederobosmina) meridionalis Sars, 1904 from Bukit Merah reservoir, Perak, Malaysia, C, lateral view. D–E, head in lateral view, lateral head pores indicated by arrows. F, bases of antennule in frontal view, frontal head pore indicated by arrow.

FIGURE 5. Acroperus africanus Neretina & Kotov, 2015 from Chini Lake, Pahang, Malaysia.A–D, parthenogenetic female.A, lateral view. B, posteroventral angle of valves. C, postabdomen. D, antenna. E–J, adult male. E, lateral view. F, postabdomen. G, antenna. H, antennule. I, ODL, copulatory hook and IDL of thoracic limb I. J, frontal side and endite 3 of thoracic limb I.

FIGURE 8. Coronatella (Coronatella) acuticostata (Sars, 1903) from roadside pond, Pahang, Malaysia, parthenogenetic female. A–C, lateral view, D–E, dorsal view. F, ventral view. G, postero-ventral portion of valves. H–I, postro-ventral angle of valves.