A new genus and species of monostiliferous hoplonemertean (Enopla: Hoplonemertea: Monostilifera) from New Zealand
Author
Gibson, Ray
Author
Strand, Malin
text
Zootaxa
2002
2002-07-12
50
1
20
journal article
51446
10.5281/zenodo.4620246
48c3dbc4-ce1c-485a-9d7e-12e1b2a27c57
11755326
4620246
Genus:
Vulcanonemertes
gen. nov.
Etymology
: The
type
locality, being a dormant volcano, is reflected in the generic name,
Vulcanonemertes
, which is derived from the Latin
Vulcan
(the fire god).
Generic diagnosis:
Monostiliferous marine hoplonemerteans with rhynchocoel extending into posterior half of body but not reaching posterior end, with wall containing two distinct muscle layers; anterior region of proboscis with three muscle layers (outer circular, middle longitudinal, inner circular), proboscis armature consisting of single central stylet and 25 accessory stylet pouches; bodywall musculature well developed, with diagonal layer, weak inner circular layer, longitudinal layer anteriorly divided; precerebral septum absent; apical organ present; cephalic glands well developed, extending far back into foregut region of body on lateral margins; submuscular glands confined to precerebral region; cerebral sensory organs far anterior, opening via pair of short, horizontal cephalic furrows; cerebral ganglia with neither neurochord cells nor inner neurilemma; lateral nerve cords with accessory lateral nerve extending full length of body; foregut opening into rhynchodaeum, divisible into oesophagus, stomach and pyloric regions, intestinal caecum with single pair of long anterior pouches; blood system with cephalic loop, single middorsal and paired lateral vessels without pseudometameric transverse connectives, all vessels thickwalled and surrounded by enormous numbers of vacuolate pouches, middorsal vessel not forming vascular plug; parenchyma extensive; excretory system confined to foregut region, eyes in four groups; sexes presumed separate.
Type
species:
Vulcanonemertes rangitotoensis
sp. nov.