''Haemoproteus concavocentralis'' is a parasite first found in the hawfinch (''

Coccothraustes coccothraustes The hawfinch (''Coccothraustes coccothraustes'') is a passerine bird in the finch family Fringillidae. It is the only species placed in the genus ''Coccothraustes''. Its closest living relatives are the Chinese grosbeak (''Eophona migratoria'' ...

'') in Bulgaria. The species can be distinguished from other avian haemoproteids due to an unfilled concave space between the central part of its advanced

gametocyte A gametocyte is a eukaryotic germ cell that divides by mitosis into other gametocytes or by meiosis into gametids during gametogenesis. Male gametocytes are called ''spermatocytes'', and female gametocytes are called ''oocytes''. Development ...

s and erythrocyte nucleus.

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Further reading