Moina dumonti Kotov, Elías-Gutiérrez and Granado-Ramírez, 2005

Moina dumonti Kotov, Elías-Gutiérrez and Granado-Ramírez, 2005 View in CoL

( Fig. 2 View Figure 2 )

Material examined. 1 ind. ( CZ-UFRPE 18010 ), Camucim Forest Protected Area, São Lourenço da Mata, Pernambuco, 8°02’18.2’’S 35°12’2.97’’W ( WGS84 ), 09 May 2018, colls. R.F. de Oliveira and F.A. Santos; 7 ind. ( CZ-UFRPE 18011 ), 4 ind. ( CZ-UFRPE 18029 ), Camucim Forest Protected Area , São Lourenço da Mata , Pernambuco, 8°02’14’’S 35°12’01’’W, 09–10 May 2018, colls. R.F. de Oliveira and F.A. Santos; 1ind. ( CZ-UFRPE 18019 ), Camucim Forest Protected Area , São Lourenço da Mata , Pernambuco, 8°01’59.8”S 35°12’03.8”W, 10 May 2018, colls. R.F. de Oliveira and F.A. Santos GoogleMaps .

Specimens. All M. dumonti specimens have morphological characters corresponding to the original description ( Kotov et al., 2005) ( Fig. 2 View Figure 2 ); with body structures of parthenogenetic females ( Fig. 2a View Figure 2 ) and males( Fig. 2b View Figure 2 ), although it was not possible to observe the presence of ocellae at the base of the first antenna. Females show short and practically cylindrical antennae, with an aesthetasc tip of similar size ( Fig. 2c View Figure 2 ); whereas males showed long and slightly curved antennae, distally with four similar hook-like setae ( Fig. 2d View Figure 2 ). Postabdomen with terminal claw showing basal pecten with five spines in females ( Fig. 2e View Figure 2 ) and four in males ( Fig. 2f View Figure 2 ). All males showed the same set of spines on the basal pecten. This morphological character easily distinguishes this species from its congeners. The setulated hook in the dorsal portion of the posterior valve observed by Farias et al. (2017) does not exist in females ( Fig. 2g View Figure 2 ) or males ( Fig. 2h View Figure 2 ) sampled in the present study.

Ecology and habitat. Parthenogenetic females, ephippials and males were collected in two distinct environments: two ponds with riparian vegetation and a predominance of the macrophyte Lemna on the waterline; and one pond without riparian vegetation and a predominance of the macrophyte Azolla . These environments showed population densities of 27,208 ind/m³ and 833 ind/m³,respectively.The influence of riparian vegetation on the zooplanktonic communities of these ponds was described by Medeiros et al. (2019), who associated the occurrence of M. dumonti with low water turbidity (45.81 ± 27.84 NTU), high oxygenation (5.17 ± 2.10 mg L- 1), and variable a- chlorophyll concentrations (23.31 ± 28.07 µg L- 1).

Distribution. Since its description, M. dumonti has been recorded in three environments in the world: two temporary habitats in Mexico and Cuba ( Kotov et al., 2005) and one perennial lagoon in Rio de Janeiro, Brazil ( Farias et al., 2017). In this study, the specimens were recorded in a habitat similar to its type-locality, temporary ponds, for the first time in the Brazilian Northeast region ( Fig. 1 View Figure 1 ). Thus, this species is now recorded in Southeast Atlantic (SE) and Oriental Northeast Atlantic (NOr) hydrographic regions of Brazil.