Cossuridae Day, 1963

Zhadan, Anna, 2015, Cossuridae (Annelida: Polychaeta: Sedentaria) from Australian and Adjacent Waters: the First Faunistic Survey, Records of the Australian Museum 67 (1), pp. 1-24 : 3-4

publication ID

https://doi.org/ 10.3853/j.2201-4349.67.2015.1639

persistent identifier

https://treatment.plazi.org/id/2B16878E-FF84-D605-FD7C-FD0AC063B699

treatment provided by

Carolina

scientific name

Cossuridae Day, 1963
status

 

Cossuridae Day, 1963 View in CoL

Key for species of Cossuridae View in CoL of Australian and adjacent waters

1 Prostomium with anterior extension; very thick thoracic neuro-

chaetae, 9–11 thoracic chaetigers .............................................................. Cossura sp. cf. ginesi

—— Prostomium without anterior extension .................................................................................... 2

2 Abdominal segments with two short acicular chaetae per para-

podium ............................................................................................................ Cossura aciculata

—— Abdominal segments with capillary chaetae only ..................................................................... 3

3 Thoracic segments swollen, with dorsolateral glandular pads;

prostomium obtuse, round ......................................................................................................... 4

—— Thoracic segments not swollen, prostomium conical, round or trapezium-shaped ....................................................................................................................... 5

4 Anterior margins of the segmental borders dorsally are drawn

forward, toward the base of branchial filament; prostomium with

round or almost straight anterior margin, very thick thoracic

neurochaetae ...................................................................................... Cossura hutchingsae n.sp.

—— Anterior margins of the segmental borders dorsally perpen-

dicular to body axis; prostomium round. Big worms, body

thick, cylindrical, 28+ thoracic chaetigers, thoracic neurochaetae

thicker than notochaetae ....................................................................................... Cossura sp. A

5 Prostomium rectangular or trapezium-shaped, with round or almost straight anterior margin, 22–26 thoracic chaetigers ...................... Cossura keablei n.sp. —— Prostomium conical, with pointed or round tip; 13–22 thoracic chaetigers ................................................................................................................................... 6

6 Thoracic neurochaetae notably thicker than notochaetae;

prostomium with pointed tip, pygidium with 3 anal cirri but

without intercirral processes ........................................................... Cossura sp. cf. longocirrata

—— Thoracic neurochaetae have almost the same width as notochaetae .............................................. 7

7 Pygidium with 3 anal cirri and interracial processes, prostomium with pointed tip; branchial filament arising from posterior part of chaetiger 2 ............................................................................... Cossura sp. cf. pygodactylata

—— Pygidium with 3 anal cirri but without intercirral processes,

prostomium with round tip; branchial filament attached to

segmental border between chaetigers 2 and 3 ........................................................................... 8

8 17–20 thoracic chaetigers, thoracic width 250–300 μm ............. Cossura queenslandensis n.sp. —— 21–32 thoracic chaetigers, thoracic width 300–660 μm ................................ Cossura consimilis

Species descriptions

Kingdom

Animalia

Phylum

Annelida

Class

Polychaeta

Family

Cossuridae

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