Table 1.

Abbreviations used in figures

af	axial furrow
afl	articulating flange
ahr	articulating half ring
an	axial node
ar1–3	pygidial axial rings
atl	antennula
aw	anterior wings of hypostome
ba	basipod
blj	body–limb joint
Cgd	midgut diverticula of the cephalon
C1–3s	sternites of cephalic segments
C/T	cephalothoracic boundary
d	doublure
dar	doublure of axial ring
dm	doublural margin
endp	distal prong of endopod podomere 7
en	endopod(s)
en1–6	endopod podomeres 1–6
ex	exopod(s)
exdl	distal lobe of exopod
expl	proximal lobe of exopod
gl	glabella
hy	hypostome
il	inner lamella
mn?	possible median node
mr	marginal rim
ms1–11	pygidial marginal spine
on	occipital node
or	occipital ring
OS	occipital segment (fourth appendage bearing segment
P1	first pygidial segment (15th trunk segment/20th appendage bearing segment)
pa1–3	postantennular appendages 1–3
phs	prehypostomal sclerite
pc	preglabellar sagittal crease
pw	posterior wings of hypostome
T1–14	tergites 1–14 (tergites of fifth to 19th appendage bearing segments)