Chaetozone PAP sp685

Family: 
Cirratulidae
Genus: 
Chaetozone
Species binomial name, or informal name: 
Chaetozone PAP sp685
Authority: 
Eulogio Soto & Gordon Paterson
Synonymies: 
Chaetozone PAP sp8
Material Examined: 
20 individual examined. Porcupine Abyssal Plain (Challenger 79, May 1991 4 individuals; Challenger 111, April 1994 1 individual; Discovery 222, September 1996 6 individuals; Discovery 226, March 1997 5 individuals and Discovery 229, July 1997 4 individuals).
Voucher: Ocean Basin: 
NE Atlantic
Voucher: Cruise/Expedition: 
BENGAL Programme
Voucher: Location: 
48.00º N -16.00 º W
Voucher: Depth: 
4835 m
Voucher: Repository: 
NHM London
Description: 

 

The largest specimen with complete body, 1.2 cm long and 1.1 mm wide for 58 chaetigers. Thoracic body shape swollen in mid to posterior region. Prostomium long, conical with a blunt and rounded tip. Elongated buccal region almost 3 times as long as broad. Peristomial region smooth in dorsal region. Palps less than 2 branchial widths to chaetiger 1. Long branchiae observed. Thoracic region 34-36 chaetigers in length

Thoracic notochaetigers with short simple capillaries 1-2 chaetigers in length from chaetiger 1, becoming long like ‘bottle-brush' (>5 chaetigers) from ch11 until ch13-14. Acicular spines present appearing from ch8.

Thoracic neurochaetigers, from chaetiger 1 are short simple capillaries of 1-2 chaetigers in length. Acicular spines present appearing from ch5. Abdominal region not constricted between segments with 22-24 chaetigers in length. Incomplete abdominal cinctures present with simple capillaries of 1 chaetiger in length and acicular spines. Seven acicular spines per fascicle in neuropodia. Six acicular spines per fascicle in notopodia. Pygidium long, with simple lobe.

Methyl green staining: Horizontal sidelines were observed in peristomium and anterior region

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

Remarks: 

Remarks: The allocation of the genus Chaetozone Malmgren 1867 is debatable owing to the presence of acicular spines in the thoracic region.

Illustrations: 

Chaetozone PAP sp 685. Top left: prostomium. Top right: thoracic region showing start of spines. Mid left: spine; Mid right: pygidial region. Bottom left: abdominal sements. Bottom right abdomnal spine.

Location

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