Body part and tergite nomenclature. SEM micrographs of a female of Trachysphaera pyrenaica (GEU157, MBiIDs 852870 and 852871). Abbreviations: Ant = antenna; AS = anal shield; Co = collum (tergite 1); h = head; th-sh = thoracic shield (tergite 2); T# = tergite number. a: lateral view, showing slightly unrolled specimen b: same specimen, view of the opening between anal shield and thoracic shield, exposing head and collum (reduced first tergite) usually held inside the sphere when rolled up