Sigambra Muller 1858
Creators: name: Plathong, Jintana
name: Plathong, Sakanan
name: Klangnurak, Wanlada
name: Dean, Harlan K.
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Annelida
Polychaeta
Phyllodocida
Pilargidae
Sigambra

description: Key to Sigambra Müller, 1858 from the Indo-Pacific region
(modified after Bhowmik et al. 2021)
1. Chaetiger 2 lacking ventral cirri; pharynx with 8 marginal papillae............................................... 2
– Chaetiger 2 lacking ventral cirri; pharynx with 12–14 marginal papillae.......................................... 4
2. Some neurochaetae with bifid tips; dorsal hooks from chaetigers 3–5; median and posterior notopodia with 2 capillaries per parapodia.................................. S. bidentata Britaev & Saphronova, 1981 (Sea of Japan, Pacific Ocean)
– Neurochaetae lacking bifid tips; dorsal hooks from chaetigers 3–7............................................... 3
3. Median antenna reaching to chaetiger 5; notopodia without capillaries, dorsal hooks from chaetigers 3–5..................................................................... S. papagayu Bamber in Muir & Bamber, 2008 (Hong Kong)
– Median antenna 2 times longer than lateral antennae; notopodia with capillaries; dorsal hooks from chaetigers 3–8........................................................ S. qingdaoensis Licher & Westheide, 1997 (China, Pacific Ocean)
4. First dorsal hooks from anterior chaetigers................................................................. 5
– First dorsal hooks from median chaetigers................................................................ 10
5. First dorsal hooks from chaetigers 3–10................................................................... 6
– First dorsal hooks from chaetigers 12–18; pharynx with 13 marginal papillae................................................................................... S. elegans Britaev & Saphronova, 1981 (Sea of Japan, Pacific Ocean)
6. Median antenna longer than lateral antennae; pharynx with 14 marginal papillae................................... 7
– Median antenna slightly longer than lateral antennae, pharynx with 13 marginal papillae; first dorsal hooks from chaetigers 7–10............................................... S. pettiboneae Hartmann-Schröder, 1979 (Western Australia)
7. First dorsal hooks from chaetiger 3–4; notopodia with capillaries............................................... 8
– First dorsal hooks from chaetiger 8....................................................................... 9
8. First dorsal hooks from chaetiger 3.................. S. phuketensis Licher & Westheide, 1997 (Andaman Sea, Thailand)
– First dorsal hooks at chaetiger 4.................................. S. hanaokai Kitamori, 1960 (Japan, Pacific Ocean)
9. Notopodia with capillaries..................................... S. pakbaraensis sp. nov. (Andaman coast, Thailand)
– Notopodia without capillaries........................................................................................ S. sundarbanensis Bhowmik, Ghoshal, Salazar-Vallejo & Mandal, 2021 (River Thakuran, Sundarbans, E India)
10. Median antenna long as 3–5 times of lateral antennae, notopodial capillaries present from anterior chaetigers; pharynx with 12 marginal papillae....................................................... S. sirilukae sp. nov. (Gulf of Thailand)
– Median antenna nearly 2 times longer than lateral antennae; notopodial capillaries present from posterior chaetigers; pharynx with 14 marginal papillae....................................... S. constricta Southern, 1921 (Chilka Lake, India)
description: Published as part of Plathong, Jintana, Plathong, Sakanan, Klangnurak, Wanlada & Dean, Harlan K., 2024, Two new species of Sigambra (Annelida, Pilargidae) from the Andaman coast and the Gulf of Thailand, pp. 1-23 in Zootaxa 5555 (1) on pages 20-21, DOI: 10.11646/zootaxa.5555.1.1, http://zenodo.org/record/14508418