New records of Parvalona parva (Crustacea: Anomopoda: Chydoridae) from Brazil, with first description of the male

Abstract

DADAY (1905) described Leydigia parva from Paraguay; later, this taxon was transferred to Alona Baird, 1843(Smirnov, 1971). However, due to its unique characteristics, VAN DAMME et al. (2005) created the new genus Parvalona to allocate this species.Until recently, the only known specimens of Parvalona parva (Daday, 1905) were those of Daday. VAN DAMME et al. (2005) reported a few parthenogenetic females from Lençóis Maranhenses, Northeast Brazil, and giving the scarcity of records, suggested that P. parva was a rare South American species. Nevertheless, the existence of these Brazilian records indicates that this taxon has a broader distribution than was previously thought. It also suggests that, at least partially, the lack of records could result from the poor knowledge on cladoceran fauna in South America.The present paper presents new records of P. parva from Brazil and describes its male for the first time. MATERIAL AND METHODSThe studied specimens were sampled from seven Brazilian sites ( th 1999 (EL00882, slides EL01542 to EL01544). Other individuals from this sample were also observed, including the juvenile male reported bellow, and deposited in the collection of the Natural History Museum of the Federal University of São Carlos.The specimens from São Paulo were sampled during the project "Zooplankton biodiversity and state of degradation of continental water ecosystems in São Paulo state" within the program BIOTA FAPESP -The Virtual Institute of Biodiversity (www.biota.org.br); UGRHI -means Water Resources Management Unity.Four adult females and two males were dissected for analysis of appendages. Enumeration of setae and other limb structures was done according to VAN DAMME et al. (2005). Drawings were made with camera lucida. RESULTSThe parthenogenetic females (Figs 2 and 8-16) fully agreed with the description presented by VAN DAMME et al. (2005). The observed denticles on the anterior outer portion of trunk limb I corm (Fig. 16) Pernambuco. These new records suggest that this species is not as rare as previously believed. The male, sexual female, and the lateral head pores of parthenogenetic females are described and illustrated for the first time.

First record of Parvalona parva (Daday, 1905) (Crustacea: Anomopoda: Chydoridae) from Colombia

“…The studied specimens (three adult females and a single juvenile) fully agreed with the descriptions of Van Damme et al (2005) and Elmoor-Loureiro et al (2009).…”

“…In South America, its occurrence has been previously reported from Paraguay and Brazil (Daday 1905;Van Damme et al 2005;Elmoor-Loureiro et al 2009;Van Damme and Dumont 2010). Nevertheless, Van Damme et al (2005) and Elmoor-Loureiro et al (2009) concluded that Daday's (1905) location was erroneously placed to Brazil, and in reality it is located in Argentina, and this species is present in Colombia also.…”

An update for cladoceran fauna (Crustacea, Branchiopoda) from Lake Paranoá, Central Brazil, with the first description of a male of Leydigiopsis ornata Daday, 1905

“…Nauplius, 25: e2017029 Remarks: The only species of the genus (Van Damme et al, 2005;Elmoor-Loureiro et al, 2009), it has a very particular morphology: body sub-ovoid, rostrum short and protruding, three main head pores connected, postabdomen wide with large and broad postanal portion, marginal denticles in groups.…”

“…Distribution: Possibly in the Neotropics (Van Damme et al, 2005;Elmoor-Loureiro et al, 2009;Fuentes-Reines, 2015). In Brazil, P. parva occurs in the Tocantins/Araguaia, Paraná, Atlântico Nordeste Ocidental and Nordeste Oriental hydrographic regions (Elmoor-Loureiro, 2017 Remarks: Species named in many studies as Disparalona dadayi or Phryxura dadayi, but Smirnov (1996) considered Alonella dadayi as the valid name for this species.…”

First record of the endemic phytophilous cladoceran Celsinotum candango Sinev & Elmoor-Loureiro, 2010, in Minas Gerais state, in a threatened shallow lake at Serra do Gandarela

“…Although they harbor up to 70% of the known cladoceran species (Elmor-Loureiro 2000, Forró et al 2008, it was only recently that wetlands of the Brazilian Cerrado were added to research aimed at taxonomic knowledge for these organisms. As a result, new species were described and new geographic patterns were established for the phytophilous cladoceran (Sinev & Hollwedel 2002, Serafim-Junior et al 2003, Elmoor-Loureiro 2007, Elmoor-Loureiro et al 2009, Sousa et al 2014.…”