Parmulopsyllus Borges & Farias & Mácola & Neves & Son 2021, gen. nov.
Creators: name: Borges, Camila
name: Farias, Amilcar
name: Mácola, Rosa
name: Neves, Elizabeth G.
name: Son, Rodrigo Johns-
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Maxillopoda
Siphonostomatoida
Entomolepididae
Parmulopsyllus

description: Parmulopsyllus gen. nov.
Diagnosis
Body shield with only pedigerous somite 2 free. Urosome cylindrical and 3-segmented.Antennule of female 16-segmented with aesthetasc on 15th segment. Antenna with 1-segmented exopod and 3-segmented endopod. Oral cone elongated. Mandible consisting of stylet and 1-segmented palp bearing two distal setae. Maxilla without ornamentations. Maxillule bilobed. Maxilliped 4-segmented. Legs 1-3 biramous, both rami 3-segmented. Third endopodal segment of leg 2 with armature formula 1,2,2; third exopodal and endopodal segments of leg 3 with armature formula III,1+I,3 and 1,2,3 respectively. Leg 4 totally absent. Free segment of leg 5 with 3 setae.
Remarks: Parmulopsyllus gen. nov. shows the characteristics of the subfamily Parmulodinae.A single thoracic free somite between cephalothorax and abdominal pleural plate. Mandible not greatly lengthened and retaining a recognizable blade. Basal segment of maxillule small, with long inner lobe, and outer lobe about 1/3 total length of the inner one. Leg 4 absent; leg 5 present as in Entomolepinae, but considerably shorter (McKinnon 1988), or totally absent as Paralepeopsyllus Ummerkutty, 1961.
Considering the swimming legs of the genera included in Parmulodinae, Parmulella has leg 4 similar to a knob or a monomerous rudiment and its leg 5 is leafshaped or clavate (Stock 1992). In Parmulodes, leg 4 is reduced to a minute distal seta and leg 5 is 1-segmented and slightly elongated (Wilson 1944, Canário et al. 2019). Parmulopsyllus gen. nov. has leg 4 totally absent and leg 5 slightly longer than in Parmulodes but not as long as in Parmulella.
Parmulopsyllus gen. nov. also differs from the other genera in its subfamily by having a 16-segmented antennule instead of a 17 or a 18-segmented antennule as in Parmulodes and Parmulella, respectively (Stock 1992, Wilson 1944); a 4-segmented maxilliped instead of a 5-segmented as both other genera, and a distinctive armature formulae on the third endopodal segment of leg 2 with formula 1,2,2 instead of 1,2,3 as Parmulodes and Parmulella (Stock 1992, Wilson 1944, Canário et al. 2019), on the third endopodal segment of leg 3 with formula 1,2,3 instead of 1,1,3 as in both other genera (Stock 1992, Canário et al. 2019).
Etymology: ‘ Parmula ’ from the Latin little shield, added suffix ‘odes’ (masculine) and ‘psyllus’ from the greek meaning flea. Gender masculine.
Type species by original designation: Parmulopsyllus iamarinoi sp. nov.
description: Published as part of Borges, Camila, Farias, Amilcar, Mácola, Rosa, Neves, Elizabeth G. & Son, Rodrigo Johns-, 2021, A new Entomolepididae genus and a new species of Spongiopsyllus Johnsson, 2000 (Copepoda, Siphonostomatoida) and their association with Aplysina Nardo, 1834 (Porifera, Demospongiae) in Todos-os-Santos Bay, Bahia, Brazil, pp. 301-316 in Zootaxa 4981 (2) on pages 302-303, DOI: 10.11646/zootaxa.4981.2.5, http://zenodo.org/record/4920498