Papilionidae
Baroniinae
Papilioninae- Leptocircini
- Eurytides
- Graphium
- Iphiclides
- Lamproptera
- Mimoides
- Protesilaus
Protographium
P. agesilaus 
- P. anaxilaus
- P. asius
- P. calliste
- P. celadon
- P. dioxippus
- P. epidaus
- P. leosthenes
- P. leucaspis
- P. marcellinus
- P. marcellus
ajax
marcellus- P. philolaus
- P. thyastes
P. zonaria- Papilionini
- Teinopalpini
- Troidini
- Parnassiinae
- Pieridae
Species
Protographium marcellus (Cramer, [1777])
ajax Linnaeus, 1758
Original Description
Papilio (Eques) ajax Linnaeus, 1758
Type specimen(s)
Status: Lectotype
Specimen data: LT (♂)
Additional information: "1♂ in LSLO, London, labelled "Ajax" [by Linnaeus], "Xuthus 751" [by Smith] is the lectotype of xuthus Linnaeus" (Honey & Scoble 2001: 293).
Current depository: LSLO, London
Type locality
Type locality as cited in original description: "America boreali"
Current country: North America
Taxonomic history
Originally described as Papilio (Eques) ajax Linnaeus, 1758
Treated as a species of Papilio by Gray (1853: 33). Treated as a species of Papilio Linn., 1767 by Kirby (1871: 558). Treated as a synonym (objectively invalid name, suppresed by ICZN) of Eurytides marcellus (Cramer, [1777]) by Miller & Brown (1981: 60). Treated as a synonym (objectively invalid name, suppresed by ICZN) of Protographium marcellus (Cramer, 1777) by Tyler et al. (1994: 30).
Treated as a species of Papilio by Gray (1853: 33). Treated as a species of Papilio Linn., 1767 by Kirby (1871: 558). Treated as a synonym (objectively invalid name, suppresed by ICZN) of Eurytides marcellus (Cramer, [1777]) by Miller & Brown (1981: 60). Treated as a synonym (objectively invalid name, suppresed by ICZN) of Protographium marcellus (Cramer, 1777) by Tyler et al. (1994: 30).
Remarks
Placed on the Official Index of Rejected and Invalid Specific Names in Zoology (ICZN, 1954: Opinion 286). See also under Papilio xuthus Linnaeus, 1767.