An integrative description of a population of Mesobiotus radiatus (Pilato, Binda & Catanzaro, 1991) from Kenya

In a moss sample collected from Mount Kulal in Kenya, a new population of Mesobiotus radiatus was found. Given that the original description of M. radiatus was based solely on the morphology observed by light microscopy and measurements based mostly on a single individual, here we describe the new population by means of integrative taxonomy and a large sample size. We provide an integrative description comprising a comprehensive set of morphometric and morphological data from light and scanning microscopy as well as nucleotide sequences of three nuclear fragments (18S rRNA, 28S rRNA, ITS-2) and one mitochondrial fragment (COI). Mesobiotus radiatus is most similar to M. binieki, M. coronatus, M. patiens, M. perfidus, M. philippinicus, M. pseudocoronatus, M. pseudopatiens, M. rigidus, M. simulans, and M. wuzhishanensis, but differs from them mainly by egg morphology and morphometry, and some characters of adult specimens

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

New records of Tardigrada from Cyprus with a description of the new species Macrobiotus marlenae (hufelandi group) (Eutardigrada : Macrobiotidae)

A new species, Macrobiotus marlenae n. sp., is described from Cyprus. The new species is similar to Macrobiotus persimilis BINDA & PILATO, 1972, M. patagonicus MAUCCI, 1988 and M. polonicus PILATO et al., 2003 but it differs from them mainly by: shorter placoids, lower number of processes on the circumference of the egg and the processes are larger and have undulations under the terminal disc. The new species differs from others also by some morphometric characters of the adults and eggs. Besides M. marlenae n. sp., four other species are reported from Cyprus: Echiniscus testudo (DOYÉRE, 1840), Macrobiotus cf. richtersi MURRAY, 1911, Milnesium tardigradum (DOYÉRE, 1840) and Ramazzottius cf. oberhaeuseri (DOYÉRE, 1840). All are new to Cyprus. A key to identification of the species of the hufelandi group that have a ‘smooth’ egg surface between processes is also given

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

The Tardigrada fauna of Mongolia (Central Asia) with a description of Isohypsibius altai sp. nov. (Eutardigrada : Hypsibiidae)

The Tardigrada fauna of Mongolia (Central Asia) with a description of Isohypsibius altai sp. nov. (Eutardigrada: Hypsibiidae). Zoological Studies 45(1): 11-23. The Tardigrada fauna of Mongolia was analyzed on the basis of the historical literature, specimens collected in 1980 by A. Pacyna, and the present research (conducted in 2000). In this paper, a list of 62 species known from Mongolia is given. During the study, 15 species were identified as new to Mongolia and 6 as new to science. Five of the new species (Itaquascon mongolicus Kaczmarek et al., Platicrista horribilis Kaczmarek and Michalczyk, Bryodelphax asiaticus Kaczmarek and Michalczyk, Isohypsibius archangajensis Kaczmarek and Michalczyk and Minibiotus weglarskae Michalczyk et al., 2005) were described in separate papers, and the 6th species, Isohypsibius altai sp. nov. is described herein. It differs from the most-similar I. macrodactylus (Maucci) and I. irregibilis Biserov by the presence of only 2 macroplacoids in the pharynx and a narrower buccal tube. It also differs from I. irregibilis by the presence of microplacoids and the lack of a projection on the upper part of the internal claws. Diphascon sexbullatum Ito was recorded during the present research. This is only the 2nd record of this species, and the 1st microphotographs of this species are provided in this paper. A key is provided for determining the species currently reported from Mongolia

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

Redescription of Dactylobiotus grandipes (SCHUSTER, TOFTNER & GRIGARICK, 1978), the type species for the genus Dactylobiotus (Tardigrada : Macrobiotidae)

Dactylobiotus grandipes, the type species of the genus, is redescribed based on the type material. D. grandipes is most similar to D. dispar, D. parthenogeneticus and D. selenicus in the shape of egg processes and the presence of dorso-lateral papillae between legs III and IV, but it differs from these species mainly by morphometric characters of the buccal tube and claws as well as by some egg traits

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