Anthalona, Van Damme, Sinev & Dumont, 2011

DAMME, KAY VAN, SINEV, ARTEM YU & DUMONT, HENRI J., 2011, Separation of Anthalona gen. n. from Alona Baird, 1843 (Branchiopoda: Cladocera: Anomopoda): morphology and evolution of scraping stenothermic alonines, Zootaxa 2875 (1), pp. 1-64: 48-51

publication ID

http://doi.org/ 10.11646/zootaxa.2875.1.1

persistent identifier

http://treatment.plazi.org/id/0390471D-FFD4-181D-FF22-D12068A4CFD2

treatment provided by

Felipe

scientific name

Anthalona
status

incertae sedis

Synonyms and Anthalona   incertae sedis

Together with Alona verrucosa   , we move a few taxa from Alona   to Anthalona   gen. n. We cannot decide on the identity behind these names because of poor original descriptions and the absence of type material. A denticle on We reproduce the original drawings of these taxa in Figure 25, compared to drawings of Anthalona verrucosa ( Sars, 1901)   , of which paralectotypes exist ( Figs 22D–L). Comments on these species included in Alona   checklist in Van Damme et al. (2010).

1. Alona alonopsiformis Brehm, 1933   = Anthalona alonopsiformis ( Brehm, 1933)   comb. nov. ( Figs 25E–F). Type locality: “Dagiangan, Indo-Malaysia”, this is likely Mindanao Island, South-Philippines. No type material exists. A. alonopsiformis   is too briefly described by Brehm to allow identification with Anthalona species   described here. But, Brehm (1933) shows a postabdomen with all characters of Anthalona   . Dumont et al. (1984) considered this animal correctly as member of the A. verrucosa- complex, but transferred the name to Africa. A. alonopsiformis   is unlikely to occur on latter continent, replaced by A. harti   n. sp. We do not want to dismiss Brehm’s name until material from the Philippines can be investigated. Without it, decisions on synonymy cannot be made. It is uncertain if the species described herein, from Borneo ( Anthalona obtusa   n. sp.), is identical, but latter may differ mainly in having a blunt denticle on the labral keel.

2. Alona verrucosa lineolata Chen & Li, 1991   = Anthalona lineolata (Chen & Li, 1991)   comb.nov. ( Figs 25G– J) =? Alona mediterranea ( Yalim, 2005)   . Type locality: reservoir in Dongshan Village, Huarong County, Hunan Province; collected by Yi Zhong in August 12, 1989 ( Chen et al. 1991). Type material deposited in the Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China (Holotype: parthenogenetic female, Paratypes: two parthenogenetic females) ( Chen, Zhang, Yi & Guo, 1991). Identity uncertain, type material could not be examined. Definitely a member of Anthalona   and certainly NOT A. verrucosa ( Sars, 1901)   . A. lineolata   has: 1) fine striation on the carapace ( Fig. 25G); 2) elongate body shape with high posterior corner ( Fig. 25G); and 3) round posterior margin and relatively long denticles on the postabdomen ( Fig. 25H). These are all typical characters of Anthalona mediterranea   . There is a strong possibility that Anthalona mediterranea ( Yalim, 2005)   , redescribed herein, may be identical to A. lineolata ( Chen et al., 1991)   . Until re-study of the Chinese taxon, we cannot make a decision on its identity. There may be also differences with A. mediterranea   . According to Chen et al. (1991), Anthalona lineolata   has a denticle on the labral keel ( Fig. 25J), lateral pores are very close to the main head pores ( Fig. 25I) and one seta is presumably (needs to be checked) absent in the second antenna (according to description; antennal formula exo/endo 003/013), present in A. mediterranea   . If both are identical, the nomenclatural situation should be examined.

3. Biapertura pseudoverrucosa pseudoverrucosa Smirnov, 1971   = Alona rectangula Sars, 1861 sensu Daday   , pseudoverrucosa   pseudoverrucosa Smirnov, 1971   as opposed to Biapertura pseudoverrucosa verrucosa   . Daday’s (1905) figures of A. rectangula   show a clear Anthalona   and the author notes several differences with A. verrucosa   . No type material exists (see Forró & Frey, 1982 for Daday’s Cladocera   collection). The figures of Daday (1905) are not realistic; his drawing style contains over-enthusiastic curves and characters may be exaggerated, others ignored. However, the name by Smirnov (1971) was not correct, as the older name verrucosa   cannot be a subspecies of the younger pseudoverrucosa   , and both do not belong in Biapertura   (= A. affinis   group). Also the major character of distinction, presence or absence of the tubercles ( Smirnov, 1971), is invalid as we observed this variable in the same stock of A. verrucosa verrucosa   (see Figs 27A–B). We regard Biapertura pseudoverrucosa Smirnov, 1971   here as a junior synonym of Alona verrucosa Sars, 1901   .

Two others names in the lump genus Alona Baird, 1843   , cannot be assigned unambiguously to Anthalona   gen. n. These taxa may be better grouped as incertae sedis under Coronatella   . First is Alona anodonta Daday, 1905   from Paraguay. Tuberculate valves, lacks a proximal denticle in the labral keel ( Daday, 1905). In the same publication and from the same samples, Daday (1905) lists Alona verrucosa   and Alona rectangula   (see above under Anthalona pseudoverrucosa ( Smirnov 1971))   , now respectively Anthalona verrucosa   and Coronatella rectangula   . Alona anodonta Daday, 1905   has the general body shape and postabdomen of these genera. Tubercles may appear in both. In a later publication, Daday considers his own species, A. anodonta   , synonym of A. rectangula (Daday 1910)   . We think that A. anodonta   may be a Coronatella   indeed. Details and status unknown, types absent. Smirnov (1971) lists A. anodonta   as tuberculate form of Alona pseudoanodonta Brehm, 1933   , but both have very different origins. Rajapaksa & Fernando (1982) depict an Alona cf. anodonta   from Sri Lanka. From their figures, this is clearly a Coronatella species.   It shows the amount of confusion in these smaller Aloninae   ... The second, Alona pseudoanodonta Brehm, 1933   , may be also be a member of Coronatella   . Description and drawings in Brehm (1933) do not allow a decision on its identity.