Dibrachicystis is an extinct genus of rhombiferan echinoderm from the early Middle Cambrian (Miaolingian, Wuliuan, about 510 Ma).
It is a stalked echinoderm within the family Dibrachicystidae which lived in what is now northernmost Iberian Chains, northern Spain.
It was found in the uppermost part of the Murero Formation at Purujosa, Moncayo Natural Park, dating to the Lower Languedocian and referred to the Solenopleuropsis thorali Zone.
B. Smith in 2011 and the type species is Dibrachicystis purujoensis.
[1] Cladogram after Zamora & Smith, 2011 (all genera not part of a named bracket are eocrinoids):[1] Kinzercystis Lyracystis Titanocrinus Aethocrinus Gogia Sinoeocrinus Akadocrinus Tatonkacystis Ubaghsicystis Dibrachicystis Pleurocystites Velieuxicystis Macrocystella Ridersia