taxonID	type	description	language	source
3C51F7836E0E56C4B823E4ABEE3A0D85.taxon	diagnosis	Diagnosis. Female. Cephalosome separated from first pediger. Fourth and fifth pedigers completely fused. Rostrum produced ventrally, with pair of frontal filaments disposed distally. Genital double-somite symmetrical with paired seminal receptacles and gonopores located ventrolaterally. Antennules asymmetrical, 21 - segmented, ancestral segments I-IV and XXIV-XXVIII fused. Left antennule exceeding fifth pediger, approximately 1.5 times longer than right counterpart. Antenna with unarmed coxa; exopod 5 - segmented, with ancestral segments II-IV, V-VII and IX-X fused, setal formula as 0, 0 - 0 - 1, 1 - 1 - 1, 1, 0 - 2. Mandible with row of setules on dorsal margin of gnathobase; endopod rudimentary, unsegmented, with 2 setae. Maxillule with 5 - 6 spines on praecoxal arthrite; coxal endite with 1 seta; coxal epipodite with 5 - 6 setae; proximal and distal basal endites without seta; endopod unsegmented with 2 setae; exopod with 3 setae. Maxilla with 2 setae on all praecoxal and coxal endites; basis having 1 heavily-chitinized spine [Maxilla with 2 setae on all praecoxal, coxal and basal endites; first endopodal segment having 1 heavily-chitinized spine (the homology by Ferrari and Ivanenko 2001, 2008)]. Maxilliped syncoxal endites with 0, 1, 0, and 2 setae, respectively; basis with 2 setae; first to sixth endopodal segments with 1, 4, 3, 2, 2 and 4 setae, respectively [Maxilliped praecoxal endites with 0, 1 and 0 setae, respectively; coxal endite with 2 setae; basis with 2 setae midway and 1 seta distally; first to fifth endopodal segments with 4, 3, 2, 2 and 4 setae, respectively (the homology by Ferrari and Ivanenko 2001, 2008)]. Legs 1 - 4 symmetrical; Seta and spine formula shown in Table 2, but basal lateral seta of leg 4 reduced in P. longicornis. Leg 5 uniramous, 3 - segmented; basis with long medial seta and short lateral seta; exopod unsegmented, with 1 lateral spine and 2 terminal spines. Male. Body, antenna, mandible, maxillule, maxilla, maxilliped, and legs 1 - 4 similar to female counterparts. Antennules asymmetrical; right antennule 21 - segmented, ancestral segments I-IV fused, XXIV-XXVIII partly fused, I-VIII with long tape-like aesthetascs. Leg 5 uniramous, 5 - segmented; basis with lateral seta; exopod 3 - segmented, proximal 2 segments with 1 lateral spine, distal segment with 2 terminal setae.	en	Komeda, Sota, Adachi, Kenta, Ohtsuka, Susumu (2021): A new species of Pilarella (Copepoda, Calanoida, Arietellidae) from the hyperbenthic layer of Japan, with a molecular phylogenetic analysis of some representative genera of the Arietellidae. ZooKeys 1038: 179-194, DOI: http://dx.doi.org/10.3897/zookeys.1038.63170, URL: http://dx.doi.org/10.3897/zookeys.1038.63170
DD5DF73DDA9F5DFE88F3D5F017594A03.taxon	description	Description. Adult female. Body (Fig. 1 A, B) compact; cephalosome separated from first pediger; fourth and fifth pedigers completely fused; posterolateral corners of prosome with small triangular process extending posteriorly. Rostrum (Fig. 1 C, D) produced ventrally, with pair of frontal filaments distally. Urosome (Fig. 1 E-G) 4 - segmented; genital double-somite symmetrical with pair of seminal receptacles; pair of gonopores located ventrolaterally. Caudal rami (Fig. 1 F, G) symmetrical, approximately 1.5 times longer than wide; minute seta I placed ventrally, seta II reduced, setae III-VI long, short seta VII dorsally; inner margin of rami furnished with row of fine setules. Antennules (Fig. 1 H, I) asymmetrical, left antennule approximately 1.5 times longer than right antennule. Right antennule (Fig. 1 H) 21 - segmented, reaching middle of second pediger, fusion pattern and armature of segments as follows: I-IV- 9 + 2 ae, V- 1 + 1 ae, VI- 2, VII- 2 + 1 ae, VIII- 2 + 1 ae, IX- 1 + 1 ae, X- 1 + 1 ae, XI- 2 + 1 ae, XII- 2 + 1 ae, XIII- 2 + 1 ae, XIV- 2 + 1 ae, XV- 2 + 1 ae, XVI- 2 + 1 ae, XVII- 2 + 1 ae, XVIII- 2 + 1 ae, XIX- 1 + 1 ae, XX- 2 + 1 ae, XXI- 1 + 1 ae, XXII- 1, XXIII- 1, XXIV-XXVIII- 10 + 1 ae. Left antennule (Fig. 1 I) 21 - segmented, reaching posterior border of genital double-somite, fusion pattern and armature of segments as follows: I-IV- 8, V- 1, VI- 2, VII- 1 + 1 ae, VIII- 2 + 1 ae, IX- 2, X- 2, XI- 2 + 1 ae, XII- 2 + 1 ae, XIII- 1 + 1 ae, XIV- 2 + 1 ae, XV- 2 + 1 ae, XVI- 2, XVII- 2 + 1 ae, XVIII- 2 + 1 ae, XIX- 1 + 1 ae, XX- 2, XXI- 2 + 1 ae, XXII- 1, XXIII- 1, XXIV-XXVIII- 9. Antenna (Fig. 2 A) with unarmed coxa; basis with inner distal seta; exopod 5 - segmented; ancestral segments II-IV, V-VII and IX-X fused, setal formula of 0, 0 - 0 - 1, 1 - 1 - 1, 1, 0 - 2; endopod indistinctly 3 - segmented and distal 2 segments partly fused, proximal segment with seta on middle of inner margin, middle segment with 3 inner setae, distal segment with 4 distal setae. Mandible (Fig. 2 B, C) gnathobase with 4 well-chitinized teeth, dorsalmost bifurcate; row of setules on dorsal margin of gnathobase; basis unarmed; endopod rudimentary, unsegmented, with 2 setae; exopod 5 - segmented, setal formula 1, 1, 1, 1, 1. Maxillule (Fig. 2 D) with 5 long spines, 1 short spine and row of long setules on praecoxal arthrite; coxal endite with 1 seta; coxal epipodite with 6 setae; proximal and distal basal endites without setae; endopod unsegmented with 2 setae; exopod with 3 setae. Maxilla (Fig. 2 E) with praecoxal and coxal endites having 2, 2, 2 and 2 setae, respectively; basis having 1 heavily-chitinized spine with row of long spinules midway; endopod 4 - segmented, setal formula 1, 3, 2, 2 [Maxilla with praecoxal and coxal endites having 2, 2 setae, respectively; basal endites having 2, 2 setae, respectively; endopod 5 - segmented, setal formula 1, 1, 3, 2, 2; first endopodal segment having 1 heavily-chitinized spine with row of long spinules midway (the homology by Ferrari and Ivanenko 2001, 2008)]. Maxilliped (Fig. 2 F) syncoxal endites with 0, 1, 0, and 2 setae, respectively; rows of long setules on inner margin of syncoxa and basis; basis with 2 setae midway; first endopodal segment partly fused to basis; first to sixth endopodal segments with 1, 4, 3, 2, 2, and 4 setae, respectively [Maxilliped praecoxal endites with 0, 1, and 0 setae, respectively; coxal endite with 1 seta; rows of long setules on inner margin of coxa and basis; basis with 2 setae midway, and 1 seta distally; first to fifth endopodal segments with 4, 3, 2, 2, and 4 setae, respectively (the homology by Ferrari and Ivanenko 2001, 2008)]. Seta and spine formula of legs 1 - 4 as shown in Table 2. Leg 1 (Fig. 3 A) with medial setules on proximal 2 segments of exopod; proximal 2 segments of endopod with lateral setules. Legs 2 and 3 (Fig. 3 B, C) with medial setules on proximal 2 segments of exopod; distal 2 segments of exopod and all segments of endopod with lateral setules. Leg 4 (Fig. 3 D) with medial setules on proximal 2 segments of exopod; distal 2 segments of exopod and proximal 2 segments of endopod with lateral setules. Leg 5 (Fig. 3 E) uniramous, 3 - segmented; basis broad, approximately 0.6 times as long as wide, with long plumose seta medially and short seta laterally; exopod unsegmented, approximately 3 times longer than wide, with 3 medial setules, 1 lateral spine and 2 terminal spines. Adult male. Body (Fig. 4 A, B) compact; cephalosome separated from first pediger; fourth and fifth pedigers completely fused; posterolateral corners of prosome with small triangular process extending posteriorly. Rostrum similar to that of female. Urosome (Fig. 4 C) 5 - segmented; gonopore located on right side of genital somite; caudal rami similar to female, except for lacking inner setules. Antennules (Fig. 4 D, E) asymmetrical. Right antennule (Fig. 4 D) 21 - segmented, ancestral segments XXIV and XXV partly fused, exceeding middle of first pediger, fusion pattern and armature of segments as follows: I-IV- 6 + 4 ae, V- 1 + 1 ae, VI- 2 + 1 ae, VII- 1 + 1 ae, VIII- 1 + 1 ae, IX- 1 + 1 ae, X- 1 ae, XI- 1 + 1 ae, XII- 1 + 1 ae, XIII- 1 + 1 ae, XIV- 1 + 1 ae, XV- 1 + 1 ae, XVI- 2 + 1 ae, XVII- 1 + 1 ae, XVIII- 1 + 1 ae, XIX- 1 + 1 ae, XX- 2 + 1 ae, XXI- 1 + 1 ae, XXII- 1, XXIII- 1, XXIV-XXVIII- 7 + 2 ae. Left antennule (Fig. 4 E) damaged; ancestral segments XV-XXVIII not observed, fusion pattern and armature of I-XV as follows: I-IV- 6 + 4 ae, V- 2 + 1 ae, VI- 1 + 1 ae, VII- 1 + 1 ae, VIII- 1 + 1 ae, IX- 1 + 1 ae, X- 2 + 1 ae, XI- 2 + 1 ae, XII- 1 + 1 ae, XIII- 1 + 1 ae, XIV- 2. Antenna, mandible, maxillule, maxilla, maxilliped and legs 1 - 4 similar to those of female. Leg 5 (Fig. 4 F) uniramous, 5 - segmented; basis with plumose seta laterally; exopod 3 - segmented, proximal 2 segments with lateral spine, distal segment with 2 terminal setae.	en	Komeda, Sota, Adachi, Kenta, Ohtsuka, Susumu (2021): A new species of Pilarella (Copepoda, Calanoida, Arietellidae) from the hyperbenthic layer of Japan, with a molecular phylogenetic analysis of some representative genera of the Arietellidae. ZooKeys 1038: 179-194, DOI: http://dx.doi.org/10.3897/zookeys.1038.63170, URL: http://dx.doi.org/10.3897/zookeys.1038.63170
DD5DF73DDA9F5DFE88F3D5F017594A03.taxon	etymology	Etymology. The specific name of the new species is derived from the Latin adjective Paraheterorhabdus compactus meaning " stocky " to denote the habitus of the present new species.	en	Komeda, Sota, Adachi, Kenta, Ohtsuka, Susumu (2021): A new species of Pilarella (Copepoda, Calanoida, Arietellidae) from the hyperbenthic layer of Japan, with a molecular phylogenetic analysis of some representative genera of the Arietellidae. ZooKeys 1038: 179-194, DOI: http://dx.doi.org/10.3897/zookeys.1038.63170, URL: http://dx.doi.org/10.3897/zookeys.1038.63170
