Pygodelphys Illg 1958

• Main Authors: Kim, Il-Hoi, Boxshall, Geoff A.
• Format: Text
• Language: unknown
• Published: Zenodo 2020
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Maxillopoda; Cyclopoida; Notodelphyidae; Pygodelphys; Seta; Antarc*; Antarctica; Copepods
• Online Access: https://dx.doi.org/10.5281/zenodo.5661671; https://zenodo.org/record/5661671

Genus Pygodelphys Illg, 1958 Diagnosis . Female body with internal brood pouch extending from anterior margin of fourth pedigerous somitebackwardsand incorporatingfusedfifthpedigerous somite. Free urosome 5-segmented in female consisting of genitalsomiteand 4 freeabdominal somites, and 6- segmented in male. Rostrum well-developed, variable in form. Female antennule typically 9- or 10-segmented: segmental fusion pattern for 9-segmented antennule I-II, III-XI, XII-XIV, XV-XVI, XVII, XVIII-XX, XXI-XXIII, XXIV, XXV-XXVIII (Fig. 30). Male antennule typically 9- or 10-segmented; non-geniculate; segmental fusion pattern usually as in female. Antenna typically consisting of coxa, basis, first endopodal segment with or without inner seta, and compound distal segment (representing fused second and third ancestral segments) bearing terminal claw; some species with allobasis (comprising basis plus first endopodal segment fused): exopod represented by 2 setae. Mandible with well developed coxal gnathobase and biramous palp armed with 1 setaon basis, 5 setae on exopod, and typically with 4 and 10 setae on first and second segments, respectively, or reduced to 2 and 8/9. Maxillulewith 9 setae on arthrite, 1 on coxal endite, 2 on epipodite, and 3 on medial margin of basis; exopod unsegmented with 4 setae distally; endopod 2-segmented or unsegmented, armed with total of 5 or 6 setae. Maxilla 5-segmented with 10 setaeonsyncoxa (enditic formula 3/4, 1, 2, 3); basis with clawplus 2 setae; 3-segmented endopod with setal formula 1 1, 3/4. Maxilliped 2- segmented; first segment typically armed with 9 setae; second segment with 2 setae. Legs 1–4 biramous with 3- segmented rami; armatureformula typically: [table omitted] Leg 5 typically consisting of 2 papillae, each bearing single setal element; exopod expressed as free segment in some species; rarely leg absent. Type species : Pygodelphys aquilonaris Illg, 1958 by original designation. Remarks . The key features of the genus, as diagnosed by Illg (1958), are the combination of a 9- to 10-segmented antennule of the female, the 2-segmented maxilliped bearing 9 and 2 setae on proximal and distal segments, respectively, the presence of setiform elements (rather than spines) on outer margins of the posterior swimming legs, and the reduction of the fifth leg to two setiform papillae. Illg (1958) designated his new species P. aquilonaris as the type species of Pygodelphys and transferred three other species from Doropygus , as P. antarctica (Schellenberg, 1922), P. novaeseelandiae (Schellenberg, 1922) and P. lamellipes (Schellenberg, 1922). Afifth species, P . patriciae Stock, 1967, was added later by Stock (1967). : Published as part of 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), pp. 1-6 in Megataxa 4 (1) on pages 92-93, DOI: 10.11646/megataxa.4.1.1, http://zenodo.org/record/4591138 : {"references": ["Illg, P. L. (1958) North American copepods of the family Notodelphyidae. Proceedings of the United States National Museum, 107 (3390), 463 - 649. https: // doi. org / 10.5479 / si. 00963801.108 - 3390.463", "Schellenberg, A. (1922) Neue Notodelphyiden des Berliner und Hamburger Museums mit einer Uberscht der ascidienwohnenden Gattungen und Arten. Mitteilungen aus dem Zoologischen Museum in Berlin, 10 (2), 217 - 274. https: // doi. org / 10.1002 / mmnz. 4830100201", "Stock, J. H. (1967) Report on the Notodelphyidae (Copepoda, Cyclopoida) of the Israel South Red Sea Expedition. Israel South Red Sea Expedition. Bulletin of the Sea Fisheries Research Station, Israel, 46 (Reports 27), 1 - 126."]}