Contribution to the knowledge of carabodid oribatid mites (Acari, Oribatida, Carabodidae) of Cuba

Two new species of oribatid mites of the family Carabodidae are described from leaf litter in forest of Cayo Santa Maria, Cuba. Carabodes paravenezolanus n. sp. is morphologically most similar to C. venezolanus Subías and Arillo, 2004, but it differs from the latter by the convex notogaster, bothridial setae with clear, flattened heads, notogaster without tubercles and epimere I with three pairs of setae. Gymnobodes minimus n. sp. is morphologically most similar to G. fraterculus (Balogh, 1963) and G. subnudus (Balogh, 1963), but it differs from both by the centro-dorsal part of notogaster with strong, well separated tubercles. An identification key to known species of Gymnobodes is given. The genus Gymnobodes is recorded for the first time in the Neotropical region. The genus Kalloia and the species Kalloia simpliseta Mahunka, 1985 are recorded for the first time in Cuban fauna.


INTRODUCTION
This work is a part of our continuing study of the Cuban fauna of oribatid mites (see Ermilov and Tolstikov 2015), and includes the data on the family Carabodidae (Acari, Oribatida).
Gymnobodes is a small genus, comprising three known species, which are distributed in the Ethiopian region and Borneo (Balogh 1963;Mahunka 1996).Hence, it is recorded for the first time in the Neotropical region.The main generic traits were summarized by Balogh (1965) and Mahunka (1986).Below, we provide an identification key for all known species of Gymnobodes.
The main goal of the paper is to describe and illustrate two new species, to compare them with closely related species, and to present data on the new findings of carabodid taxa in Cuba.

MATERIALS AND METHODS
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 (µm).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 drawing tube using a Carl Zeiss transmission light microscope "Axioskop-2 Plus".Images were obtained with an AxioCam ICc3 camera using a Carl Zeiss transmission light microscope "Axio Lab.A1".The collection locality and habitat for each species are given in the respective "Material examined" section.
Type deposition -The holotype (alcohol) is deposited in the collection of the Senckenberg Institute, Görlitz, Germany; 23 paratypes (alcohol) are in the collection of the Tyumen State University Museum of Zoology, Tyumen, Russia.
Etymology -The specific name paravenezolanus refers to the morphological similarity of the new species to Carabodes venezolanus Subías and Arillo, 2004.Remarks -Carabodes paravenezolanus n. sp. is similar to Carabodes venezolanus Subías and Arillo, 2004 from Venezuela (see Subías and Arillo 2004) in having spoon-like interlamellar and notogastral setae and long bothridial setae.However, the new species differs from the latter by the convex notogaster (vs.posterior part flattened), bothridial setae with short, clear, flattened head (vs.elongate, slightly developed, barbed unilaterally), notogaster without tubercles (vs.with tubercles) and epimere I with three pairs of setae (vs.with one pair).4), all inserted on prodorsum.Bothridial setae (32) with longer, smooth stalk and shorter, flattened head covered by barbs and ribs, directed laterally.Exobothridial setae and their alveoli absent.Small concavity located anteriorly to interlamellar setae.Tutoria absent.5A, C) -Anterior notogastral margin slightly convex medially.Humeral shoulders distinctly visible, pointed anteriorly.Ten pairs of notogastral setae similar in length, minute (4).Lyrifissures and opisthonotal gland openings not found under tuberculate layer.

TABLE 1 :
Leg setation and solenidia of Carabodes paravenezolanus n. sp.(same data for Gymnobodes minimus n. sp.)Roman letters refer to normal setae, Greek letters to solenidia (except ɛ = famulus).Single prime (ʹ ) marks setae on anterior and double prime (ʹʹ ) setae on posterior side of the given leg segment.Parentheses refer to a pair of setae.