New records of oribatid mites from Michoacán state, Mexico

Eleven species of oribatid mites are reported from Michoacán state, Mexico for the first time: Ceratozetidae: unidentified species of Adoribatella Woolley, 1967; Damaeidae: Belbodamaeus (Lanibelba) palaciosi (Iglesias & Guzmán, 2012); Eremobelbidae: Eremobelba piffli Mahunka, 1985; Microzetidae: Acaroceras (Acaroceras) similis Balogh, 1962; Nothridae: Nothrus anauniensis Canestrini & Fanzago, 1877; Oppiidae: unidentified species of Cheloppia Hammer, 1971; Oppiella (Oppiella) nova (Oudemans, 1902); Pseudoamerioppia barrancensis (Hammer, 1961); Ramusella (Insculptoppia) merimna (Balogh & Mahunka, 1977); Wallworkoppia cervifer (Mahunka, 1983); and Scheloribatidae: Scheloribates (Scheloribates) elegans Hammer, 1958. The genera Cheloppia and Adoribatella are reported for the first time from Mexico.

Two sampling sites were considered in the work that generated this publication. Site 1: an intervened primary forest, consisting mainly of Pinus michoacana Martínez (Pinaceae), Quercus rugosa Née (Fagaceae) and scattered understory, located at Nuevo San Juan Parangaricutiro (19°23'27.8 "N; 102° 10'30.8" W), 2160 m above sea level. Site 2: an avocado (Persea americana Mill. Var. Hass, Lauraceae) cultivation with conventional management, located at Uruapan (19°23'47.2 "N; 102°05'58.1" W), 1725 m above sea level. Five soil samples (15 cm 3 ) were collected from each ecosystem and processed in Berlese-Tullgren funnels to extract the oribatid mites. These were counted, macerated in lactic acid and mounted in Hoyer's medium (Walter & Krantz 2009). The studied material was deposited in the private collection of acarology of the ENTOMOACARI laboratory, at la Trinidad, Texcoco, Mexico state, Mexico. The classification of Shatz et al. (2011) was used for superfamilies and families; while the nomenclature for genera and species, biogeographical distributions and synonyms were obtained from Subias (2020). The taxa collected are subsequently cited.
Material examined: 2 ♂, from site 1. World distribution: Holartic. Observations: First report of this genus for Mexico.

Belbodamaeus (Lanibelba) palaciosi (Iglesias & Guzmán, 2012) (Fig. 1B)
Material examined: 4 ♀ and 1 ♂, from both sites. World distribution: Mexico. Observations: this species has a long flagellate sensillus, 11 pairs of smooth, gradually tapered, radially directed and slightly curved notogastral setae, poorly developed P processes, occasionally present in a beak or rounded. Setae in long, almost as long as the sensillus; setae ro and la smooth. Originally described from specimens collected from Taxco, Guerrero, Mexico.
Material examined: 2 ♂, from site 1. World distribution: Neotropical (Peru and Mexico). Observations: sensillus directed forward, filiform and ciliated. Seta la originating below lamellar cusps, inner tip of cusp pointed, both tips opposite and touching. Setae in extend beyond the lamellar cusps. Notogaster longer than wide. Notogastral setae without surrounding sclerotic rings. Originally described from Cuzco, Peru. First reported from Mexico in the state of Quintana Roo (Vázquez et al. 2016). , 1877 (Fig. 1E) Material examined: 1 ♀ and 1 ♂, from site 1. Observations: species characterized by having h2 only slightly longer than p1, with expanded end. Originally described from Italy (Canestrini & Fanzago 1876); previously reported in Mexico from Quintana Roo state (Vázquez 1999).

Pseudoamerioppia barrancensis
Observations: costula, crista and seta in absent; notogastral setae not dilated distally, sensillus slightly dilated and bilaterally ciliated. Cilia as long as the width of the dilated part of the sensillus. Originally described from Lima, Peru. In Mexico, it has been previously recorded from San Cristobal de las Casas, Chiapas (Mahunka 1983).