Orbiniidae

Zhadan, Anna, 2020, Review of Orbiniidae (Annelida, Sedentaria) from Australia, Zootaxa 4860 (4), pp. 451-502 : 453-454

publication ID

https://doi.org/ 10.11646/zootaxa.4860.4.1

publication LSID

lsid:zoobank.org:pub:876F1085-5296-4340-A951-41420C011917

DOI

https://doi.org/10.5281/zenodo.4538357

persistent identifier

https://treatment.plazi.org/id/03A787FE-3B52-0873-ABBF-FF04FA364028

treatment provided by

Plazi

scientific name

Orbiniidae
status

 

Key to Australian and New Zealand Orbiniidae View in CoL

1 Two achaetous segments after the prostomium; border between thorax and abdomen indistinct; small worms............. 2

- One achaetous segment after the prostomium; medium-size and large worms; border between thorax and abdomen more or less clear (subfamily Orbiniinae View in CoL )............................................................................. 3

2 Abdominal segments bear capillaries and possibly forked chaetae in notopodium, capillaries and uncini in neuropodia........................................................................................... Protoariciella View in CoL spp.

- Abdominal segments bear capillaries and swan-shaped chaetae, no uncini or forked chaetae................................................................................................. Proscoloplos cygnochaetus Day, 1954 View in CoL

3 Prostomium pointed................................................................................... 4

- Prostomium rounded to square in front ( Naineris View in CoL )........................................................... 22

4 Not more than four podal papillae and subpodal or stomach papillae combined on posterior thorax..................... 5

- More than four podal papillae and subpodal or stomach papillae combined on posterior thorax....................... 18

5 No uncini among thoracic neurochaetae; thorax usually rounded in section. No subpodal or stomach papillae on posterior thorax ( Leitoscoloplos View in CoL )................................................................................... 6

- At least some uncini present among thoracic neurochaetae; thorax usually flattened; none to three subpodal papillae on posterior thorax........................................................................................... 8

6 Only one podal papilla on posterior thoracic neuropodia...................................................... 7

- Two podal papillae from neuropodium 10–11; thorax with 18–22 chaetigers; branchiae start from chaetiger 8–9....................................................................................... L. bifurcatus (Hartman, 1957) View in CoL

7 Branchiae from chaetiger 19–21, short and broadly lamellate on abdomen; abdominal neuropodia uniramous with a conical inner lobe and strongly reduced outer lobe............................................. L. latibranchus Day, 1977 View in CoL

- Branchiae start from chaetiger 12–16; thorax with 13–15 chaetigers; abdominal neuropodia strongly bilobed with inner lobe longer than outer.................................................................. L. bilobatus Mackie, 1987 View in CoL

8 Branchiae from chaetiger 8 or later; abdominal neuropodia with 1–2 thin embedded aciculae; a few, or occasionally up to 4 rows of uncini among thoracic neurochaetae ( Scoloplos View in CoL ) ...................................................... 9

- Branchiae from chaetiger 5–7; three to five rows of uncini in thoracic neuropodia, capillaries few or absent; abdominal neuropodia with one thick protruding acicula ( Leodamas View in CoL )......................................................... 14

9 Branchiae starting from last thoracic or first abdominal segment, dichotomously branched from mid-abdomen onwards; thorax with 15–18 chaetigers, abdominal neuropodial lobes uniramous............................ S. cylindrifer Ehlers, 1904 View in CoL

- Branchiae not branched............................................................................... 10

10 Posterior thoracic neuropodia bilobed (with two podal papillae), in abdominal chaetigers flange papillae (ventral cirri) present; 20–24 thoracic chaetigers, branchiae from chaetiger 8–9.................. S. dayi Hartmann-Schröder & Hartmann, 1980 View in CoL

- All thoracic neuropodia with one podal papilla; no flange papillae (ventral cirri) in abdomen........................ 11

11 Thorax of 20 or more chaetigers; branchiae starting from chaetiger 8; abdominal neuropodia with two subequal lobes.............................................................................. S. novaehollandiae ( Kinberg, 1866) View in CoL

- Thorax of less than 20 chaetigers........................................................................ 12

12 Thoracic neuropodia bear 2–4 anterior rows of uncini and one row of capillaries; abdominal neuropodia bilobate with subequal lobes; bear capillaries and flail chaetae; in abdominal notopodia capillaries and forked chaetae present. Prostomium with very long pointed tip, 17–20 thoracic chaetigers, branchiae from penultimate thoracic segment................................................................................................ S. acutissimus Hartmann-Schröder 1991 View in CoL

- Thoracic neuropodia with few uncini forming no more than half row; abdominal neuropodia with outer lobes much smaller than inner or completely reduced, no more than 17 thoracic chaetigers.............................................. 13

13 Prostomium short, with sharp or blunt tip; thorax with 13–15 chaetigers; branchiae from chaetiger 14–17 (first or second abdominal chaetiger); anterior abdominal neuropodia weakly bilobed; rudimentary outer lobe rapidly lost so neuropodia become uniramous; abdominal neuropodia with capillaries only, notopodia also bear forked chaetae........ S. normalis ( Day, 1977) View in CoL

- Prostomium long, with sharp tapering tip; thorax with 13–17 chaetigers; branchiae present as minute papillae from chaetiger 9–13; always well developed on first abdominal segment; abdominal neuropodia distinctly biramous with inner lobe longer than outer; bear capillaries and flail chaetae; no forked chaetae in abdominal notopodia........ S. simplex ( Hutchings 1974) View in CoL

14 Thoracic and anterior abdominal notopodial lobes with at least three branches; 17 thoracic chaetigers................................................................................................. L. dendrocirrus ( Day, 1977)

- Thoracic and abdominal notopodial lobes not branched...................................................... 15

15 Branchiae from chaetiger 7; 3-4 subpodal papillae in posterior thoracic and anterior abdominal segments............................................................................................. L. fimbriatus (Hartman, 1957)

- Branchiae from chaetiger 6............................................................................ 16

16 No subpodal or stomach papillae on posterior thorax or anterior abdomen; thoracic neuropodia without podal papillae or with one papilla on the last thoracic neuropodia; abdominal neuroaciculae distally curved 90°to 180°......................................................................................... L. australiensis ( Hartmann-Schröder, 1979)

- Subpodal papillae present at thorax-abdomen junction....................................................... 17

17 Thoracic neuropodia with one or no podal papillae; one subpodal papillae on last thoracic and anterior abdominal chaetigers; 20–32 thoracic chaetigers; abdominal neuroaciculae straight................................ L. cirratus ( Ehlers 1897) View in CoL

- Posterior thoracic neuropodia with 1–2 podal papillae and 1–2 subpodal papillae, two anterior abdominal chaetigers with two subpodal papillae, next 10–15 with one; thorax with 15–24 chaetigers; abdominal neuroaciculae vary from straight to slightly curved........................................................................... L. johnstonei ( Day, 1934) View in CoL

18 No heavy spines among neurochaetae on posterior thoracic segments ( Orbinia View in CoL )................................... 19

- A few heavy spines (often elongated) among neurochaetae on posterior thoracic segments ( Phylo View in CoL ).................... 20

19 Branchiae from chaetiger 8. Thorax with 15–21 chaetigers with a maximum of three podal papillae, ten subpodal and three stomach papillae................................................................... O. hartmanae Day, 1977 View in CoL

- Branchiae from chaetiger 5. Thorax with 26 to 32 chaetigers with about 10 podal papillae and numerous stomach papillae................................................................................. O. papillosa ( Ehlers, 1907) View in CoL

20 Thoracic and anterior abdominal notopodia branched.................................... P. fimbriatus ( Moore, 1903)

- Thoracic and abdominal notopodia not branched........................................................... 21

21 Thorax with 16–18 chaetigers; interramal cirrus longer than the neuropodium..................... P. felix Kinberg, 1866 View in CoL

- Thorax with 15 chaetigers; interramal cirrus shorter than the neuropodium.................. P. novazealandiae Day, 1977 View in CoL

22 Two podal papillae on posterior thoracic neuropodia; interramal cirrus present; one bidentate neuroaciculum................................................................................................ N. victoriae Day, 1977 View in CoL

- One podal papilla on all thoracic neuropodia; no interramal cirrus; three to five blunt neuroaciculae................... 23

23 Prostomium rounded in front; 11–19 thoracic chaetigers with branchiae from chaetiger 5–9...... N. laevigata ( Grube, 1855) View in CoL

- Prostomium square in front; 30–38 thoracic chaetigers; branchiae from chaetiger 6............ N. australis Hartman, 1957 View in CoL

Kingdom

Animalia

Phylum

Annelida

Class

Polychaeta

Family

Orbiniidae

GBIF Dataset (for parent article) Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF