Two new species of Macrobiotidae, Macrobiotus szeptyckii (harmsworthi group) and Macrobiotus kazmierskii (hufelandi group) from Argentina

In moss samples collected in Argentina two new species of Eutardigrada were found. One of them, M. szeptyckii sp. n., belongs to the harmsworthi group and differs from other species of the group by some qualitative characters and morphometric traits of adults and eggs. The other new species, M. kazmierskii sp. n., belongs to the hufelandi group and differs from the most similar M. patagonicus by the presence of the first band of teeth in the oral cavity, the presence of a constrictio

The first record of the genus Calohypsibius Thulin, 1928 (Eutardigrada : Calohypsibiidae) from Chile (South America) with a description of a new species Calohypsibius maliki

A new Calohypsibiidae, Calohypsibius maliki sp. nov., is described from a moss sample collected in Chile. The new species differs from others of the genus Calohypsibius mainly by the configuration of spines on the dorsal side of the body. The key to all Calohypsibius species is also provided

Minibiotus constellatus, a new species of Tardigrada from Peru (Eutardigrada : Macrobiotidae)

A new eutardigrade, Minibiotus constellatus n. sp. is described from samples of moss collected in Peru. This species is similar to Minibiotus sidereus PILATO et al., 2003 in having large star-shaped, as well as small round pores over the cuticle. Nevertheless, M. constellatus n. sp. differs from M. sidereus in having thinner lateral thickenings in the buccal tube, the presence of five pores around the mouth and fine granulation around the claws of at least II-IV pairs of legs

A new species of Tardigrada (Eutardigrada : Milnesiidae) : Milnesium krzysztofi from Costa Rica (Central America)

A new eutardigrade species Milnesium krzysztofi sp. nov. is described from Costa Rica. M. krzysztofi sp. nov. differs from the most similar Milnesium katarzynae Kaczmarek et al., 2004 mainly by the presence of spurs on internal claws I-III and on external claw IV

First record of the genus Doryphoribius PILATO, 1969 from Costa Rica (Central America) and description of a new species Doryphoribius quadrituberculatus (Tardigrada : Hypsibiidae)

A new eutardigrade, Doryphoribius quadrituberculatus is described from a moss sample collected in Costa Rica. The new species is similar to D. flavus (IHAROS, 1966) and D. maranguensis BINDA & PILATO, 1995 but differs from the former by the presence of 4 gibbosities on caudal end of the body and the presence of oral cavity armature, and from the latter by a more complicated oral cavity armature, and the presence of a distinct reticular design on dorsal and lateral sides of the body instead of irregular tubercle

Itaquascon mongolicus, a new species of Eutardigrada from Mongolia (Eutardigrada : Hypsibiidae)

A new eutardigrade, Itaquascon mongolicus sp. n. is described from moss collected in Mongolia. This species differs from others members of genus in having lunules with teeth

Description of a new Tardigrade, Macrobiotus barbarae (Eutardigrada : Macrobiotidae) from the Dominican Republic

A moss sample collected in the Dominican Republic contained tardigrades and their eggs, including adults and eggs of a new species, Macrobiotus barbarae sp. nov. The new species belongs to the harmsworthi group and it is most similar to M. ovostriatus Pilato et Patanè, 1998 and M. pseudonuragicus Pilato et al., 2004 in the character of egg areolation. It differs from M. ovostriatus above all by larger body size and wider buccal tube, better developed oral cavity armature (the first band of teeth is present and the second band of teeth forms a ring of triangular teeth) and indentation of hind lunulae. M. barbarae sp. nov. differs also from M. pseudonuragicus in details of the egg projections (in M. pseudonuragicus the terminal portion of processes is short, not elongated and divided into several short points whereas in the new species the terminal parts are elongated and generally not divided). Differences between the new species and other similar members of the harmsworthi group are also discussed