Cossuridae Day, 1963
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
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.