Actornithophilus incisus ( Piaget, 1880 )

Palma, Ricardo L. & Peck, Stewart B., 2013, <strong> An annotated checklist of parasitic lice (Insecta: Phthiraptera) from the Galápagos Islands </ strong>, Zootaxa 3627 (1), pp. 1-87 : 10-11

Actornithophilus incisus ( Piaget, 1880)

Colpocephalum incisum Piaget, 1880: 569 , pl. 47, fig. 9.

Colpocephalum milleri Kellogg & Kuwana, 1902: 483 , pl. 30, fig. 6.

“ Colpocephalum funebre ” Kellogg 1906: 320 (not Colpocephalum funebre Kellogg, 1896 ).

Colpocephalum milleri Kellogg & Kuwana, 1902 ; Kellogg 1906: 321.

Actornithophilus milleri ( Kellogg & Kuwana, 1902) ; Thompson 1938b: 207.

Actornithophilus incisus ( Piaget, 1880) ; Hopkins & Clay 1952: 22.

Clypeodon incisus ( Piaget, 1880) ; Timmermann 1954a: 830, figs 1c, 2a,b.

Actornithophilus incisus ( Piaget, 1880) ; Clay in Linsley & Usinger 1966: 127.

Holotype ♂ in NHML ( Clay 1953: 641).

Type host: Phaethon flavirostris (Brandt, 1837) = Phaethon lepturus Daudin, 1802 , in error (see Hopkins & Clay 1952: 22).

Galápagos host: Anous stolidus galapagensis Sharpe, 1879 .

Galápagos localities: Isla Wolf; Isla Marchena; Isla Fernandina; Isla Isabela; Isla Seymour; Isla Rábida.

Galápagos references: Kellogg & Kuwana (1902); Kellogg (1906); Kellogg (1908: 57); Thompson (1938b); Linsley & Usinger (1966).

Other significant references: Timmermann (1954a); Clay (1962: 202, 242); Palma (1996: 111); Price et al. (2003: 83).

Material examined: 22 males, 26 females and 15 nymphs (7 samples, EMEC, MONZ) .

Remarks: The morphological differences between Actornithophilus incisus from Anous stolidus ( Linnaeus, 1758) and Actornithophilus ceruleus (Timmermann, 1954) from Anous minutus Boie, 1844 were not detected by Kellogg & Kuwana (1902), who included both louse populations in a single species: Colpocephalum milleri . However, Anous minutus is not included in the Galápagos Islands avifauna ( Harris 1989: 117; Castro & Phillips 1996: 110).

From the Kellogg Collection, we have identified seven males and 16 females of A. incisus , plus three males and three females of A. ceruleus . Five of these six specimens of A. ceruleus are from Clipperton Island, and the sixth is a male with host and locality recorded as “ Geospiza fuliginosa, Albermale Id (Galapagos) ” (slide 1056 = 1008a, EMEC). This louse is most likely a contaminant from an Anous minutus collected on Clipperton Island by the Hopkins Stanford Galapagos Expedition in their way to the Galápagos Islands (see Palma 1994b: 269). Several species of Galápagos birds ( Butorides sundevalli , Camarhynchus psittacula affinis , Geospiza fortis , Phaethon aethereus , Sula granti , Sula nebouxii and Zenaida galapagoensis ) recorded by Kellogg & Kuwana (1902: 483) and Kellogg (1906: 321) as hosts for Colpocephalum milleri are the result of contaminations from Anous stolidus galapagensis . At present, Anous stolidus ( Linnaeus, 1758) is the only host species of A. incisus ( Price et al. 2003: 83) .