Spirobolida, Bollman, 1893

Riquelme, Francisco & Hernández-Patricio, Miguel, 2018, The millipedes and centipedes of Chiapas amber, Check List 14 (4), pp. 637-646 : 638-639

Spirobolida sp. indet.

Referred material. 2 specimens: MALM.313: adult of indeterminate sex, complete specimen ( Fig. 1D–E); MALM.18: juvenile, complete specimen ( Fig. 2A–C).

Locality. Mexico, Chiapas: Simojovel: La Pimienta site, 17° 08 ′ 29 ″ N, 092°45 ′ 46 ″ W.

Identification. Head with 18 or 11 ocelli, antenomeres short and flattened, collum smooth; trunk smooth with about 40 rings in MALM.313 or 28 as seen in MALM.18, telson with a preanal sclerite, two well-rounded valves and a short subanal plate. This is the first fossil record of Spirobolida in Chiapas amber.

Remarks. Living members of Spirobolida are found in 23 states of Mexico, including Baja California Sur, Baja California, Colima, Chiapas, Chihuahua, Durango, Guanajuato, Guerrero, Jalisco, Mexico City, Michoacán, Morelos, Nayarit, Nuevo León, Oaxaca, Puebla, Quintana Roo, San Luis Potosí, Tamaulipas, Veracruz, Yucatán, the State of Mexico, and Zacatecas ( Bueno-Villegas et al. 2004, Shelley 2010, Medrano 2014).

Subterclass Eugnatha Attems, 1898

Superorder Juliformia Attems, 1926