Alternative spelling: Macromastix
Invalid subtaxa: Leptotarsus (Macrothorax) Jaennicke 1867 [replaced name], Macrothorax Jaennicke 1867 [replaced name]
Parent taxon: Leptotarsus according to W. Krzemiński 2019
See also Carpenter 1992 and Evenhuis 1994
Sister taxa: Leptotarsus (Longurio), Leptotarsus acciolii, Leptotarsus alemaoi, Leptotarsus andradei, Leptotarsus bonifacioi, Leptotarsus buscalioniae, Leptotarsus capanemai, Leptotarsus contractus, Leptotarsus coutoi, Leptotarsus cretaceus, Leptotarsus eva, Leptotarsus feijoi, Leptotarsus ferreirai, Leptotarsus gelhausi, Leptotarsus grimaldii, Leptotarsus ibericus, Leptotarsus ivoneae, Leptotarsus lagosi, Leptotarsus lemeae, Leptotarsus lemesi, Leptotarsus lukashevichae, Leptotarsus macquarti, Leptotarsus martinsnetoi, Leptotarsus pereirai, Leptotarsus petrii, Leptotarsus reyi, Leptotarsus ribeiroi, Leptotarsus velosoi
Subtaxa: Leptotarsus (Macromastix) bornhardti Leptotarsus (Macromastix) cladoptera
Ecology:
Distribution:
• Eocene of the Russian Federation (1 collection), the United Kingdom (2)
Total: 3 collections each including a single occurrence