Caligus undulatus Shen & Li 1959
- Dataset
- Two new species of planktonic Caligus O. F. Müller 1785 (Copepoda: Caligidae) from Türkiye with an updated review and checklist of planktonic caligids
- Rank
- SPECIES
Classification
- kingdom
- Animalia
- phylum
- Arthropoda
- class
- Copepoda
- order
- Siphonostomatoida
- family
- Caligidae
- genus
- Caligus
- species
- Caligus undulatus
Caligus undulatus Shen & Li 1959
Updated key to species of Caligus undulatus -group (females only)
1. Distal segment of antennule short (less than 2.5 times length of proximal segment)................................. 2
- Distal segment of antennule elongate (about 2.5 times length of proximal segment)....................... C. longiramus
2. Sternal furca present................................................................................... 3
- Sternal furca absent.............................................................. C. yucatanensis comb. nov.
3. Genital complex at least 3 times longer than abdomen................................................ C. evelynae
- Genital complex less than 3 times longer than abdomen....................................................... 4
4. Postantennal process with accessory tine on base part......................................... C. sarosensis sp. nov.
- Postantennal process simple, lacking accessory tine.......................................................... 5
5. Sternal furca with tines closely adpressed along midline...................................... C. izmiriensis sp. nov.
- Tines of sternal furca clearly separated.................................................................... 6
6. Abdomen distinctly 2-segmented and about as long as genital complex.................................... C. chelifer
- Abdomen 1-segmented and shorter than genital complex...................................................... 7
7. Abdomen more than 2 times longer than wide...................................................... C. undulatus
- Abdomen less than 2 times longer than wide................................................................ 8
8. Dorsal cephalothoracic shield subtriangular, with straight lateral margins................................ C. tripedalis
- Dorsal cephalothoracic shield rounded, with evenly convex lateral margins................................ C. ogawai
Name
- Homonyms
- Caligus undulatus Shen & Li 1959