Orbinia Quatrefages, 1865

Sun, Yue & Li, Xinzheng, 2018, Orbinia wui, a new species from China, with redescription of O. dicrochaeta Wu, 1962 (Annelida, Orbiniidae), Zootaxa 4403 (2), pp. 351-364 : 362-363

publication ID

https://doi.org/ 10.11646/zootaxa.4403.2.7

publication LSID

lsid:zoobank.org:pub:3248C26C-47E5-489C-908B-9A8B80546A6A

DOI

https://doi.org/10.5281/zenodo.6486203

persistent identifier

https://treatment.plazi.org/id/03E987E4-FFC8-FFD3-61E2-FA541491FC4E

treatment provided by

Plazi

scientific name

Orbinia Quatrefages, 1865
status

 

Key to species of Orbinia Quatrefages, 1865 View in CoL

1 Branchiae from anterior thoracic chaetigers (usually chaetigers 5–6), thoracic neuropodial postchaetal lobes fimbriated with more than three papillae...Group A........................................................................ 2

- Branchiae from middle and posterior thoracic chaetiger (usually posterior to chaetiger 8), thoracic neuropodial postchaetal lobes only with 1–3 papillae...Group B.................................................................... 14

2 Change in structure of thoracic neuropodial uncini from anterior to posterior of thorax............................... 3

- No distinct change in structure of thoracic neuropodial uncini from anterior to posterior of thorax...................... 4

3 Thorax with 13–16 chaetigers, first 6 chaetigers with rows of uncini and subsequent thoracic chaetigers with rows of subulun- cini................................................................................... Orbinia wui View in CoL sp. n.

- Thorax with 19 chaetigers, anterior thoracic chaetigers with serrated uncini while posterior chaetigers with smooth uncini............................................................................. Orbinia armandi ( McIntosh, 1910) View in CoL

4 Thorax with 50 chaetigers, thoracic neuropodial uncini smooth, interramal cirri present.......... Orbinia monroi Day, 1955 View in CoL

- Thorax with less than 50 chaetigers, thoracic neuropodial uncini smooth or serrated................................. 5

5 Furcate chaetae present in abdominal notopodia............................................................. 6

- Furcate chaetae absent in abdominal notopodia............................................................. 17

6 Thoracic neuropodial uncini bent but smooth, interramal cirri present.................... Orbinia bioreti ( Fauvel, 1919) View in CoL

- Thoracic neuropodial uncini serrated, with longitudinal median groove, interramal cirri absent.................................................................................................... Orbinia papillosa ( Ehlers, 1897) View in CoL

7 Interramal cirri present................................................................................. 8

- Interramal cirri absent.................................................................................. 9

8 Thorax with 22–24 chaetigers................................................. Orbinia sertulata ( Savigny, 1822) View in CoL

- Thorax with 30–33 chaetigers................................. Orbinia latreillii (Audouin & H Milne Edwards, 1833) View in CoL

9 Flail chaetae present in abdominal neuropodia, thorax with 21 chaetigers................. Orbinia americana Day, 1973 View in CoL

- Flail chaetae absent in abdominal neuropodia.............................................................. 10

10 Thorax with more than 30 chaetigers..................................................................... 11

- Thorax with less than 30 chaetigers...................................................................... 12

11 Thorax with 35–38 chaetigers, thoracic neuropodial uncini smooth, with lateral sheath....... Orbinia cornidei ( Rioja, 1934) View in CoL

- Thorax with 31 chaetigers, thoracic neuropodial uncini serrated......................... Orbinia swani Pettibone, 1957 View in CoL

12 Without subpodial lobes...................................................... Orbinia exarmata ( Fauvel, 1932) View in CoL

- With subpodial lobes on several chaetigers................................................................. 13

13 Thorax neuropodia with crenulated capillaries............................... Orbinia angrapequensis ( Augener, 1918) View in CoL

- Thoracic neuropodia without capillaries......................................... Orbinia glebushki Averincev, 1990 View in CoL

14 Interramal cirri absent................................................................................. 15

- Interramal cirri present................................................................................ 17

15 Flail chaetae absent in abdominal neuropodia, neuropodial uncini blunt and serrated........ Orbinia johnsoni ( Moore, 1909) View in CoL

- Flail chaetae present in abdominal neuropodia, neuropodial uncini smooth....................................... 16

16 Furcate chaetae absent in abdominal notopodia, with 3–4 capillaries........... Orbinia camposiensis Leão & Santos, 2016 View in CoL

- Furcate chaetae present in abdominal notopodia, with one half row of capillary.............. Orbinia hartmanae Day, 1977 View in CoL

17 Interramal cirri only present in thoracic parapodia.................................... Orbinia orensanzi Blake, 2017 View in CoL

- Interramal cirri only present in abdominal parapodia......................................................... 18

- Interramal cirri present in thoracic and abdominal parapodia................................................... 19

18 Stomach papillae forming ventral fringe on chaetigers 15–17...................... Orbinia vietnamensis Gallardo, 1968 View in CoL

- Stomach papillae present on first 3 abdominal chaetigers, numbering only up to 8......................................................................................... Orbinia oligopapillata López, Cladera & San Martín, 2006 View in CoL

19 Furcate chaetae absent in abdominal notopodia........................................... Orbinia dubia Day, 1955 View in CoL

- Furcate chaetae present in abdominal notopodia............................................................ 20

20 Thorax with 24–27 chaetigers, branchiae from chaetiger 11–13......................... Orbinia dicrochaeta Wu, 1962 View in CoL

- Thorax with 19 chaetigers, branchiae from chaetiger 10.............................. Orbinia riseri ( Pettibone, 1957) View in CoL

Kingdom

Animalia

Phylum

Annelida

Class

Polychaeta

Order

Orbiniida

Family

Orbiniidae

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