Centrorhynchus Luhe 1911

Key to species of the genus Centrorhynchus of the birds of Ukraine and adjacent territories 1а. Pear-shaped proboscis with extension in the middle part............................................................................ 2 1b. Proboscis other form...........................................................................................................................................3 2a. In anterior and posterior parts of proboscis same 30–36 longitudinal hook rows. To a level of attachment of the proboscis receptacle 12–13 hooks in row.................................................................. C. spinosus 2b. In anterior part of proboscis 34 longitudinal hook rows, in posterior part — 40. To a level of attachment of proboscis receptacle 9–10 hooks.................................................................................................. C. narcisae 3a. Anterior part of proboscis almost cylindrical without evident narrowing in level of attachment of proboscis receptacle..................................................................................................................................................4 3b. Anterior part of proboscis spherical or spade-shaped with evident narrowing in the level of attachment of proboscis receptacle........................................................................................................................................6 4а. Proboscis with 38–42 longitudinal hook rows of 26–27 hooks.................................................... C. magnus 4b. Proboscis with 26–34 longitudinal hook rows of 19–21 hooks....................................................................5 5а. Proboscis with 26–30 longitudinal hook rows. Blade of the largest hook 42 length............ C. amphibius 5b. Proboscis with 30–34 longitudinal hook rows. Blade of the largest hook 50–65 length.................................................................................................................................................................................. C. globocaudatus 6а. Each longitudinal row with 19–20 hooks. Eggs 45–55 × 25.......................................... C. polissiensis sp. n. 6b. Each longitudinal row with 13–18 hooks. Eggs 56–72 × 28–35...................................................................7 7а. First 7–10 hooks in each longitudinal row large with strong roots............................................ C. buteonis 7b. First 3–6 hooks in each longitudinal row large with strong roots............................................................... 8 8а. First 3–5 (usually 4) hooks in each longitudinal row large with strong roots. Eggs 56–65 × 28–30......................................................................................................................................................................... C. aluconis 8b. First 4–6 (usually 5) hooks in each longitudinal row large with strong roots. Eggs 68–72 × 33–35..................................................................................................................................................................... C. conspectus
Published as part of Lisitsyna, O. I. & Greben, O. B., 2015, Acanthocephalans Of The Genus Centrorhynchus (Palaeacanthocephala, Centrorhynchydae) From Birds Of Ukraine With The Description Of A New Species, pp. 195-210 in Vestnik Zoologii 49 (3) on page 208, DOI: 10.1515/vzoo-2015-0022, http://zenodo.org/record/6452328