Centromedon
Key to the species of Centromedon 1. Gnathopod 1 simple; pereopod 7, basis with prominent postero-distal spur. Centromedon calcaratus (Sars, 1879) - Gnathopod 1 subchelate; pereopod 7, basis lacking prominent postero-distal spur. 2 2. Lateral cephalic lobe strongly projecting, acute; epimeron 3 with...
| Main Authors: | , |
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| Format: | Other/Unknown Material |
| Language: | unknown |
| Published: |
2011
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| Subjects: | |
| Online Access: | https://zenodo.org/record/6191152 https://doi.org/10.5281/zenodo.6191152 |
| Summary: | Key to the species of Centromedon 1. Gnathopod 1 simple; pereopod 7, basis with prominent postero-distal spur. Centromedon calcaratus (Sars, 1879) - Gnathopod 1 subchelate; pereopod 7, basis lacking prominent postero-distal spur. 2 2. Lateral cephalic lobe strongly projecting, acute; epimeron 3 with postero-distal corner produced into an acute strongly upcurved tooth. Centromedon productus (Goës, 1866) - Lateral cephalic lobe subacute; epimeron 3 produced into an acute tooth, not strongly upcurved. 3 3. Coxa 1 tapering strongly, sub-triangular; gnathopod 1 propodus sub-triangular, palmar angle obscure. 4 - Coxa 1 tapering weakly; gnathopod 1 propodus sub-rectangular, palmar angle distinct. 5 4. Lateral cephalic head lobe short, sub-triangular; dactyls of pereopods 3 and 4 longer than propodus; article 4 of maxillipedal palp vestigial. Centromedon pavor (Barnard, 1966) - Lateral cephalic head lobe produced, sub-acute; dactyls of pereopods 3 and 4 shorter than propodus; article 4 of maxillipedal palp short. Centromedon pumilus (Lilljeborg, 1865) 5. Urosomite 1 with distinct triangular acute carina. 6 - Urosomite 1 lacking distinct triangular acute carina. Centromedon typhlops (Sars, 1879) 6. Gnathopod 2 chelate. Centromedon mediator (Barnard, 1962) - Gnathopod 2 minutely subchelate. 7 7. Gnathopod 1 basis setose anteriorly; pereopods 3 and 4 dactyls subequal in length to propodus; coxa 1 concave anteriorly. Centromedon zoe sp. nov. - Gnathopod 1 basis with two setae anteriorly; pereopods 3 and 4 dactyls longer than propodus; coxa 1 convex anteriorly. Centromedon laevis (Bonnier, 1896) Published as part of Horton, Tammy & Thurston, Michael, 2011, Centromedon zoe (Crustacea: Amphipoda: Lysianassoidea: Uristidae), a new deep-water scavenger species from the North Atlantic, with a key to the genus Centromedon, pp. 54-62 in Zootaxa 2869 on page 61, DOI:10.5281/zenodo.277530 |
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