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Chaetozone PAP sp10

Submitted by gljpaterson on Fri, 01/09/2009 - 11:15
Family: 
Cirratulidae
Genus: 
Chaetozone
Species binomial name, or informal name: 
Chaetozone PAP sp10
Authority: 
Eulogio Soto & Gordon Paterson
Material Examined: 
19 individuals examined. Porcupine Abyssal Plain (Challenger 111, April 1994 2 individuals; Discovery 222, September 1996 3 individuals; Discovery 226, March 1997 9 individuals; Discovery 229, July 1997 1 individuals and Discovery 237, September 1998 4 individuals).
Voucher: Ocean Basin: 
NE Atlantic
Voucher: Cruise/Expedition: 
BENGAL Programme
Voucher: Location: 
Porcupine Abyssal Plain 48.00º N 16.00 º W.
Voucher: Depth: 
4835 m
Voucher: Repository: 
NHM, London
Description: 

The largest specimen with complete body, 5 mm long and 0.4 mm wide for 34 chaetigers. Thoracic body shape slightly swollen in mid region. Prostomium long, widely conical with blunt tip. Elongate buccal region long, wider than prostomium 2-3 times as long as broad. Palps more than 2 branchial widths to chaetiger 1. Palps scars present. Branchiae visible in some thoracic chaetigers in dorsal-posterior position to notochaetae. Thoracic region 20-22 chaetigers in length.
Thoracic noto and neurochaetae from chaetiger 1 are simple capillaries, 7-8 per fascicle,1-2 chaetigers in length. Thoracic acicular spines not observed. The appearance and long of ‘long 'bottle-brush' chaetae were variable. It was present from chaetiger 1 and 5. Abdominal region shape varies between uniform width and necklace-shaped. Complete abdominal cinctures composed by acicular spines, 18 per fascicle, and simple capillaries were observed. Abdominal region 14 chaetigers in length. Pygidium short with terminal anus.

Methyl green staining: Smooth and uniformly diffused green.

Habitat: This species was found within the sediment at a depth of 0-5 cm.

Remarks: 

The presence of simple acicular spines in posterior chaetigers arranged in cinctures would be indicating the genus Chaetozone . This species differs from other PAP Chaetozone species described in shape and length of the peristomium, starting position of long chaetaes (bottle-brush), shape of abdominal region and the presence of terminal anus in the pygidium.

Location

United States
48° 0' 0" N, 16° 0' 0" W
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