A promonocyte (or premonocyte) is a cell arising from a monoblast and developing into a monocyte.

Myeloid blood cells and plasma

Granulopoiesis Myeloblast Promyelocyte Myelocyte Metamyelocyte Band cell
Monocytopoiesis Monoblast Promonocyte

Thrombopoiesis Megakaryoblast Promegakaryocyte
Erythropoiesis Proerythroblast Normoblast Reticulocyte

General

Macrophages	Histiocytes Kupffer cells Alveolar macrophage Microglia Osteoclasts Epithelioid cells giant cells Langhans giant cells Foreign-body giant cell Touton giant cells
Other	Antigen-presenting cells Dendritic cells Langerhans cell CFU-DL Monoblast MPS