Catalogue of the mite family Tydeidae (Acari: Prostigmata) with the world key to the species Author Silva, Guilherme Liberato Da Author Metzelthin, Maicon Henrique Author Silva, Onilda Santos Da Author Ferla, Noeli Juarez text Zootaxa 2016 4135 1 1 68 journal article 10.11646/zootaxa.4135.1.1 9cfc9ada-6ec3-4487-af1c-fabc55e38263 1175-5326 255684 0A1EB3C1-E4B4-429D-915D-B291EDEAA485 Key to the species of Metalorryia André 1. Dorsal idiosomal setae nude; palptibia seta short: not longer than 1/3 of length of palptarsus....................................................................................................... M. magdalenae ( Gerson, 1968 ) - Dorsal idiosomal setae serrate; palptibia seta long: nearly as long as palptarsus..................................... 2 2. Dorsal opisthosomal setae club-like (broadened distally)....................................................... 3 - Dorsal opisthosomal setae lanceolate or leaf-shaped (pointed).................................................. 5 3. Palpal terminal eupathidium (p’ζ) rod-like: not broadened, but rounded distally; bothridial ( bo ) setae two times longer than others dorsal idiosomal setae, with slender and feeble distal part........................... M. palpsetosa ( Karg, 1975 ) - Palpal terminal eupathidium (p’ζ) not rod-like, being broadened or cleft, not rounded distally; bothridial ( bo ) setae nearly the same length of other dorsal idiosomal setae, without slender and feeble distal part..................................4 4. Dorsal idiosomal setae club-like strongly serrated; gnathosoma concealed by aspidosoma; bothridial ( bo ) setae twice as long as other dorsal setae.............................................................. M. insignita ( Kuznetzov, 1971 ) - Dorsal idiosomal setae lanceolate slightly serrated; gnathosoma visible from above; bothridial ( bo ) setae only slightly longer than other dorsal setae.......................................................... M. armaghensis ( Baker , 1968) 5. Dorsal setae leaf-shaped: ratio of length to width of each seta about 3:1..................... M. foliata Kaźmierski, 1998 - Dorsal setae lanceolate, much narrower....................................................................6 6. Palptarsal eupathidium simple, rod-like with round tip; seta d on palp forked; solenidion ɷI located anteriorly on palp; multiangular cells (most often hexagonal) and reticulum connected by Y-shaped cross ties; frames of meshes with single I or double II-shaped costulae...................................................... .. M. anchisi Momen & Lundqvist, 2005 - Palptarsal eupathidium with cross-piece on tip (T-shaped); seta d on palp is simple; solenidion ɷI located posteriorly on palp; frames of meshes without I-shaped costulae......................................... M. delicata ( Kuznetzov, 1971 ) junior synonym: M. cristata ( Karg, 1975 )