The first record of Bergamina lineolata (Chydoridae; Aloninae) from Colombia

The Neotropical freshwater cladoceran Bergamina lineolata (Sars, 1901) was found in a small temporal pond in the Magdalena department. Hitherto, it has been reported in Brazil and El Salvador. It was originally described as Alonella lineolata by Sars, 1901 from Brazil and then placed to the genus Bergamina by Elmoor-Loureiro et al. (2013). This is the first record of this species in Colombia. B. lineolata can be identified by a unique combination of characters including: 1) a remarkably large and oblong postabdomen, with three denticles on distal corner; 2) basal spine of the claw very short, length less than the half claw diameter at base; 3) IDL with two setae shorter than ODL seta, armed with fine setules unilaterally in terminal half; 4) endite 1 of trunk limb I with a long smooth seta between endites 1 and 2.

Morphological ontogeny of Hydrozetes paulista (Acari, Oribatida, Hydrozetidae), with comments on Hydrozetes Grandjean

The morphological ontogeny of Hydrozetes paulista Pérez-Íñigo & Baggio, 1989 is described and illustrated. This species is monodactylous as adult, with short, setiform bothridial seta and belongs to the “lacustris species group”. It has 13 pairs of notogastral setae, including c2, but seta c3 is retained by some individuals. Most gastronotal setae of larva are of medium size and barbed, except for longer setae lm, lp and h2, and short and smooth c1 and h3. In the nymphs setae of l-series, h1 and h2 are very long, smooth and dark pigmented, setae h3 and p1 are of medium size, thick, pointed and barbed, and other setae are short and usually smooth; seta lm is located anterior to the gland opening. Hydrozetes paulista is bisexual, but in this study only females were present.

Morphological ontogeny of Anachipteria magnilamellata (Acari, Oribatida, Achipteriidae), with comments on Anachipteria Grandjean

The morphological ontogeny of Anachipteria magnilamellata (Ewing, 1909) is described and illustrated. The adult of this species lacks the anterior pteromorphic projection, and has 10 pairs of notogastral setae, with longer c2 and la, and four pairs of porose areas, with the largest Aa. Genua I and II of A. magnilamellata have an anteroventral projection, seta v'' on femur II is longer than bv'', seta l' on femur III is short and leg tarsi are heterotridactylous, with smooth claws. The prodorsal setae of juveniles are minute, except short rostral seta (ro), whereas the gastronotal setae are short or medium sized and barbed. Seta h1 is absent from the larva. The leg segments of juveniles are stocky, and leg claws and most leg setae are smooth. Seta d at solenidion φ on tibia IV is present. The morphology of A. magnilamellata is compared with that of congeners. We consider Weigmanniella Subías, 2010 as a junior synonym of Anachipteria.

Morphology of the first zoeal stage of Macrobrachium surinamicum Holthuis, 1948 (Malacostraca, Decapoda, Palaemonidae) hatched in the laboratory

The first zoeal stage of the freshwater shrimp Macrobrachium surinamicum Holthuis, 1948 is described and illustrated based on hatchlings from an ovigerous female, collected in Rio Campupema, Abaetetuba, in the northern Brazilian state of Pará, and compared with the first zoeae of several other species of the genus occurring in Brazil. Although the first zoeae of the different species of Macrobrachium are morphologically very similar, they can still be separated by a combination of morphological characters but only M. surinamicum has one smooth seta on the maxillular endopod. Although a complete larval series of M. surinamicum presently remains unknown, as pereiopods 3-5 and pleopods are absent, the outcome of this study suggests that the larval development of this species is extended and includes at least seven larval stages.