Harris: Synopsis of genera and species 
Female caudal ramus rhomboid or rounded posteriorly; terminal 
seta T2 always present, T1 or T3 may be absent (Fig. 12J 
or K, L); posterior edge straight at acute angle with medial 
edge (bevelled) and T4 at apex (Fig. 12M, N) or posterior 
edge convex with T4 at apex (Fig. 12K) or posterior edge 
may be rounded, no apex (Fig. 12 O). 10 
Female caudal ramus lateral corner deeply recessed or bevelled 
bearing T1 and y. T2 and T3 very close, T4 near medial corner, 
(Fig. 12G). Anterior comb on segment 3 of male antennule b . 
Falciform ridge of female P5 extended as ventral expansion 
(Fig. 12P). Maxillule a endopod with six setae . Kushia 
Female caudal ramus with T1 and y deeply recessed at lateral 
comer. T2, T3 and T4 evenly spaced across posterior border 
(Fig. 12H). Female genital double-somite narrow, pointed 
posteriorly. No comb on segment 3 of male antennule. No 
ventral expansion on female P5. Maxillule a with two setae on 
endopod. (Plate 3A, p. 190). Brevifrons 
Female caudal ramus may or may not be recessed (Fig. 12E, 
F).T2 and T3 very close, T4 near medial corner. Female genital 
double-somite broad, rounded posteriorly. No comb on segment 
3 of male antennule. No ventral expansion on female P5. 
Maxillule a with six setae on endopod. 8 
Male antennule b 5' seta absent from anterior lobe, 5 seta and one 
coupling denticle present on segment 3, ventral lobe (blade or 
knob) absent, segment 4 with four denticles (large denticulate 
pad plus three serrated denticles). (Plate 3C, p. 190). Murramia 
Male antennule b setae 8 and 8' always present on anterior lobe 
of segment 3 but no coupling denticle, a ventral lobe (blade or 
knob) may be present, segment 4 with three denticles (shapes 
variable but never a brush-pad). Porcellidium 
Maxillule a endopod with six setae. Anterior of male cephalo- 
some concave. Male antennule b segment 3 without a coupling 
denticle, segment 4 with two denticles. (Plate 3D, p. 190) . Geddesia 
Maxillule a endopod with two setae. Anterior of male cephalo- 
some semicircular (not truncated). Male antennule b with one 
denticle on segment 3, segment 4 with four denticles. (Plate 3B). Mucrorostrum 
Maxillule a endopod with one seta. (Male characters not known). Clunia 
Male P5 oval with one lateral seta, terminal setae absent or 
reduced to very small spines. Anterior of male cephalosome 
deeply concave. Seta T1 absent from caudal ramus, T3 present, 
(Fig. 12J). Female genital double-somite not divided into anterior 
and posterior lobes . Synurus 
Male P5 trapezoid with six terminal setae. Anterior of male 
cephalosome semicircular. Seta T1 present, T3 absent from 
caudal ramus, (Fig. 12K, L). Female genital double-somite 
not divided into anterior and posterior lobes. Ravania 
Male P5 trapezoid with six terminal setae. Anterior of male 
cephalosome truncated. Seta T1 and T3 present on caudal 
ramus, (Fig. 12M-0). Female genital double-somite divided into 
anterior and posterior lobes by notch, cleft or indentation. Acutiramus 
Study of maxillule setation requires dissection, but a maxillule with six setae on the endopod can usually be identified 
without dissection (see Fig. 13 for position of maxillule). 
The male antennule must be viewed from ventral aspect fully extended (see Methods and terminology). For different 
“types” of coupling denticle arrangement, see Harris (2014b, pp. 161-162). 
