First record of Diaphanosoma spinulosum Herbst 1975 (Cladocera: Sididae) for inland water bodies of Ecuador

Abstract:

The genus Diaphanosoma Fisher, 1850 is widely distributed in the world, excepting Antarctica and New Zealand (Korovchinsky, 2018). According to Kotov et al.(2013), the genus Diaphanosoma comprise a total of 34 species, however, only one species (D. brachyurum Lieven 1848) is known in Ecuador (López et al., 2018). This occurrence is questionable because D. brachyurum represents a complex of species and populations out of natural distribution (Holarctic zone) might belong to sibling species (Elías-Guitiérrez et al., 1999; Korovchinsky, 2018). In Argentina, D. brachyurum should be assigned as D. birgei Kořínek, 1981 (Juan C. Paggi, personal communication). At least seven other species of the genus Diaphanosoma inhabit in South America (Paggi, 1978; Elmoor-Loureiro, 1998; Korovchinsky, 2018) and consequently some of these could be found in Ecuador. Here, the occurrence of Diaphanosoma spinulosum Herbst 1975 in Albarrada Martín Pescador, an artificial and temporal water body in Guayas Province of the Coastal region of Ecuador is recorded. This is the first record of this species for Ecuadorian inland waters (López et al., 2018). The studied specimens were collected with a plankton net with pore mesh of 45 µm, preserved with 4% formalin, and these were analyzed and dissected with the aid of a stereomicroscope. Microphotographic images and measurements were made with NIS-Elements G software.

Año de publicación:

2021

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