1	Maxillule located anterior to maxilla; maxillular coxal epipodite with 5–9 setae	2
–	Maxillule located posterior to maxilla and maxilliped; maxillular coxal epipodite without setae	Griceus Ferrari & Markhaseva, 2000
2	Third exopodal segment of leg 1 with 1 outer spine	3
–	Third exopodal segment of leg 1 with 2 outer spines	6
3	Maxillular praecoxal arthrite with 5–6 elements	4
–	Maxillular praecoxal arthrite with 0–2 elements	Metacalanus Cleve, 1901
4	Distal endite on maxillary praecoxa with 2 setae (coxal endite on maxilla with 2 setae)	5
–	Distal endite on maxillary praecoxa with 1 seta (coxal endite on maxilla with 1 seta)	Scutogerulus Bradford, 1969
5	Third ancestral segment on antennary exopod without seta; legs 1–4 symmetrical; female leg 5 with 1 basal medial seta, 1 exopodal lateral spine and 2 exopodal distal spines	Pilarella Alvarez, 1985
–	Third ancestral segment on antennary exopod with seta; legs 1–4 asymmetrical; female leg 5 with no basal medial seta, 2 exopodal lateral spines and 2 exopodal distal spines	Metacalanalis Ohtsuka, Nishida & Machida, 2005
6	Maxillular endopod absent or unsegmented with 0–3 setae	7
–	Maxillular endopod 3-segmented with 6 setae	Rhapidophorus Edwards, 1891
7	Maxillule with 6 setae on coxal epipodite	8
–	Maxillule with 8–9 setae on coxal epipodite	9
8	Antennary exopod indistinctly 10-segmented; maxillule with strongly serrate spines on coxal arthrite; innermost seta on fifth endopodal segment of maxilliped long; outermost seta on sixth endopodal segment of maxilliped not reduced (innermost seta on fourth endopodal segment of maxilliped long; outermost seta on fifth endopodal segment of maxilliped not reduced)	Crassarietellus Ohtsuka, Boxshall & Roe, 1994
–	Antennary exopod indistinctly 8-segmented; maxillule with weakly serrate spines on coxal arthrite; innermost seta on fifth endopodal segment of maxilliped short; outermost seta on sixth endopod segment of maxilliped reduced (innermost seta on fourth endopodal segment of maxilliped short; outermost seta on fifth endopod segment of maxilliped reduced)	Campaneria Ohtsuka, Boxshall & Roe, 1994
9	Innermost seta on fourth and fifth endopodal segments of maxilliped ordinary (Innermost seta on third and fourth endopodal segments of maxilliped ordinary)	10
–	Innermost seta on fourth and fifth endopodal segments of maxilliped vestigial (Innermost seta on third and fourth endopodal segments of maxilliped vestigial)	Arietellus Giesbrecht, 1892
10	Ancestral segment X on antennary exopod with 3 elements	11
–	Ancestral segment X on antennary exopod unarmed	Paraugaptilus Wolfenden, 1904
11	Leg 4 without inner coxal seta; second segment of antennary endopod with 3 inner setae midway	12
–	Leg 4 with inner coxal seta; second segment of antennary endopod with 2 inner setae midway	Paraugaptiloides Ohtsuka, Boxshall & Roe, 1994
12	Antennulary segments XXV and XXVI fused; maxillary basal spine without spinules (spine on first endopodal segment of maxilla without spinules); basal inner process on female leg 5 with 0–2 setae	13
–	Antennulary segments XXV and XXVI separated; maxillary basal spine with spinules (spine on first endopodal segment of maxilla with spinules); basal inner process on female leg 5 with 4 setae	Sarsarietellus Campaner, 1984
13	Female genital double-somite with single copulatory pore; third ancestral segment on exopod of female leg 5 with at most 3 elements and 1 process	Paramisophria T. Scott, 1897
–	Female genital double-somite with paired copulatory pores; third ancestral segment on exopod of female leg 5 with 1 outer, 1 subterminal and 2 terminal elements; male unknown	Protoparamisophria Ohtsuka, Nishida & Machida, 2005