Chamaesipho is a genus of four-plated notochthamaline barnacles in the Pacific Ocean limited to Australian/New Zealand temperate waters.

The scutum bears a visible lateral depressor pit, and a scutal adductor ridge which ranges from nearly absent/indistinct to rounded prominent.

(Modified from Poltarukha, 2006)[2]: 66 As presently defined, Chamaesipho is found in the upper littoral to sublittoral zone of Australia, Tasmania, and New Zealand.

Darwin, 1854, described Chamaesipho scutelliformis, a living species from South China Sea, with considerable reservations as to generic assignment.

[5]: 211  In his original description of Chamaesipho columna, Spengler[6] appears to have used abnormally large shells listed as from Otaheite (Tahiti).

The four completely fused shell plates show that Chamaesipho was fully derived on generic level in Paleogene times.