Contribution to the knowledge of Galumnoidea (Acari, Oribatida) of Cuba

Abstract An annotated checklist of identified oribatid mites of the superfamily Galumnoidea collected from Cuba, including ten species from four genera and two families, is provided. Galumna flabellifera Hammer, 1958, Pergalumna bifissurata Hammer, 1972, Pergalumna bryani (Jacot, 1934), Pergalumna decorata Balogh & Mahunka, 1977 and Galumnopsis secunda Sellnick, 1923 are recorded for the first time in the Cuban fauna. A new species of Pergalumna, Pergalumna cubaensis sp. n., is described; it is morphologically similar to Pergalumna decorata Balogh & Mahunka, 1977, but differs from the latter by the larger body size, heavily granulated prodorsum and well-developed interlamellar setae. The adult of Allogalumna cubana Balogh & Mahunka, 1979 is redescribed.


Introduction
At present, oribatid mites of the superfamily of Galumnoidea (Acari, Oribatida) are poorly known in the Cuban fauna (Balogh and Mahunka 1979;Jeleva et al. 1984;Palacios-Vargas and Socarrás 1993;Socarrás and Palacios-Vargas 1999). During taxonomic identification of material collected from Cuba, ten galumnoid species were found, including one new for science. The main goal of the paper is to describe this species under the name Pergalumna cubaensis sp. n.
The genus Pergalumna is a large genus with more than 140 species having a cosmopolitan distribution (Subías 2004(Subías , updated 2015. The updated generic diagnosis and identification key to known species in the Neotropical region were presented by Ermilov et al. (2013Ermilov et al. ( , 2014b. Additionally, data are presented on the specific localities, with notes on new records, overall known distributions of registered taxa, and a supplementary description of Allogalumna cubana Balogh & Mahunka, 1979, which was described briefly and incompletely by Balogh and Mahunka (1979) from Cuba.
Specimens were mounted in lactic acid on temporary cavity slides for measurement and illustration. The body length was measured in lateral view, from the tip of the rostrum to the posterior edge of the ventral plate. Notogastral width refers to the maximum width in dorsal aspect. Lengths of body setae were measured in lateral aspect. All body measurements are presented in micrometers. Formulas for leg setation are given in parentheses according to the sequence trochanter-femur-genu-tibia-tarsus (famulus included). Formulas for leg solenidia are given in square brackets according to the sequence genu-tibia-tarsus. General terminology used in this paper follows that of Grandjean (summarized by Norton and Behan-Pelletier 2009). Drawings were made with a camera lucida using a Carl Zeiss transmission light microscope "Axioskop-2 Plus".
Integument. Body color black-brownish. Prodorsum, epimeral region and anterolateral parts of pteromorphs heavily granulated; granules rounded or slightly elongated, their diameter or length up to 6. Notogaster, anogenital region, pteromorphs and genital and anal plates striate.
Legs. Morphology of leg segments, setae and solenidia typical for Pergalumna (see    of setae and solenidia indicated in Table 1. Solenidion φ of tibiae IV inserted dorsally at about 2/3 length of segment. Material examined. Locality Cuba 1: holotype (female) and two paratypes (female and male).
Type deposition. The holotype is deposited in the collection of the Senckenberg Museum, Görlitz, Germany; two paratypes are in the collection of the Tyumen State University Museum of Zoology, Tyumen, Russia.
Etymology. The specific name cubaensis refers to the country of origin, Cuba. Remarks. Pergalumna cubaensis sp. n. is morphologically most similar to P. decorata Balogh & Mahunka, 1977 from the Neotropical region (see Balogh and Mahunka 1977) in having a rounded rostrum, a striate notogaster, an anterior margin of notogaster, three pairs of rounded porose areas on the notogaster, and setiform bothridial setae. However, the new species differs from the latter by the larger body size (962-1029 × 763-780 vs. 637-653 × 469-494 in P. decorata), a heavily granulated prodorsum (vs. striate in P. decorata), and the interlamellar setae being of medium size (vs. minute in P. decorata).
Integument. Body color brown to light brown. Body surface punctate (visible under high magnification, ×1000).
Legs. Morphology of leg segments, setae and solenidia, formulas of leg setation and solenidia similar to Pergalumna cubaensis sp. n. (Table 1), but solenidion φ of tibiae IV inserted dorsally at about 1/3 length of segment, directed backwards in basal part.