Doropygella Sars, 1921

Kim, Il-Hoi & Boxshall, Geoff A., 2020, Untold diversity: the astonishing species richness of the Notodelphyidae (Copepoda: Cyclopoida), a family of symbiotic copepods associated with ascidians (Tunicata), Megataxa 4 (1), pp. 1-6 : 303

Genus Doropygella Sars, 1921

Diagnosis. Body of female comprising cephalosome and 4-segmented metasome: fourth pedigeroussomite forming brood pouch, largely incorporating fifth pedigerous somite. Freeurosome 5-segmented in female, 6-segmented in male. Caudal ramus with 6 setae or mix of 2 setae and 4 spines. Antennule 9-segmented, typically with proximal 2 segments inflated. Antenna 4-segmented including coxa, basis, and 2-segmented endopod; exopod absent. Mandible consistingof coxa, basis, exopod and endopod; exopod armed with 5 setae and endopod with 4 and 10 setae on first and second segments, respectively. Maxillule armedwith 9 or 10 setae on arthrite, 1 on coxal endite, 2 on epipodite, and 4 each on basis and exopod; endopod 2-segmented with total of 6 or 7 setae. Maxilla bearing claw plus 2 setae on basis. Maxilliped 2- or (typically) 3-segmented with 9 or 10 setae in total; middle segment (when expressed) unarmed; distal segment with 3 (sometimes 2) setae. Legs 1–4 with 3-segmented rami; inner coxal setae absent. Armature formula for legs 1–4 typically as follows (but some setal elements on third endopodal segment of legs 2–4 transformed into spines in some species):

	Coxa	Basis	Exopod	Endopod
Leg 1	0-0	1-I	I-1; I-1; III, I, 4	0-1; 0-1; 1, 2, 3
Leg 2	0-0	1-0	I-1; I-1; II, II, 5	0-1; 0-2; 1, II, I+2
Leg 3	0-0	1-0	I-1; I-1; II, II, 4	0-1; 0-2; 1, II, I+2
Leg 4	0-0	1-0	I-1; I-1; I, II, 4	0-1; 0-2; 1, II, I+1

Leg 5 consisting of protopod typically fused to somite plus free exopodal segment armed with 2 (or 1) slender setal elements.

Type species. Doropygella thorelli ( Aurivillius, 1882) , by original monotypy.

Remarks. Sars (1921) established this genus to accommodate D. thorelli on the basis of “several peculiarities, both as regards the outward appearance of the body and the structure of some of the appendages”. Unfortunately, Sars did not specify the nature of the peculiarities which he regarded as of generic significance although the unsegmented condition of the mandibular exopod is diagnostic. Illg (1958) explored the distinction between Doropygella and Doropygus and recognized a lineage he referred to as “the thorelli-normani line”, which he considered represented a natural grouping. As a consequence, Illg (1958) transferred three species from Doropygus to Doropygella : D. normani ( Brady, 1878) , D. porcicauda ( Brady, 1878) , and D. psyllus ( Thorell, 1859) . Two new species have been added subseqently, D. hastalae Monniot, C., 1981 and D. spinicauda Monniot, C., 1961 .Afurther two new species are described here and the type species is redescribed based on new material.