Columbicola guimaraesi, Tendeiro, 1965

Adams, Richard J., Price, Roger D. & Clayton, Dale H., 2005, Taxonomic revision of Old World members of the feather louse genus Columbicola (Phthiraptera: Ischnocera), including descriptions of eight new species, Journal of Natural History 39 (41), pp. 3545-3618 : 3558-3559

2. guimaraesi species group

This group consists of three species from the host genera Chalcophaps , Cryptophaps , and Columba . Like the columbae group, they have the anterior marginal head carina rounded, complete ( Figure 26 ); body elongate ( Figure 1 ); and each side of metanotum with two long, two short setae ( Figure 2 ). Male antenna with enlarged scape, spur on third segment; mesosome ovoid, laterally thickened, with numerous pores, and parameres with medial expansions ( Figure 27 ). Female subgenital plate groove elongate, shape variable ( Figures 29, 32, 34 ); each side with 3–8 short to long setae.

Columbicola guimaraesi Tendeiro

( Figures 26–29 ) Columbicola guimaraesi Tendeiro 1965: 166 . Type host: Chalcophaps i. indica (L.).

Description

Male head as in Figure 26 , long and narrow, with APW, 0.118 –0.137 (0.125); HW, 0.25– 0.27 (0.261); HL, 0.50–0.55 (0.536); HL/ HW, 2.00–2.16 (2.06); SL, 0.103 –0.118 (0.110). Thorax with PW, 0.20–0.22 (0.211); MW, 0.23–0.26 (0.250). Genitalia as in Figure 27 ; parameres long with wide medial expansions; mesosome large and shield-like, with 3 pores on each anterior margin; GW, 0.083 –0.098 (0.089). TL, 2.03–2.33 (2.17). Female similar to male except as follows. Head as in Figure 28 ; APW, 0.127 –0.147 (0.136); HW, 0.25–0.30 (0.274); HL, 0.56–0.61 (0.577); HL/ HW, 2.00–2.28 (2.10). Thorax with PW, 0.21–0.25 (0.226); MW, 0.25–0.31 (0.271). Ventral terminalia as in Figure 29 ; subgenital plate groove long, narrow, widening posteriorly, bordered on each side by 3–6 short setae (0.007 –0.011). TL, 2.45–2.71 (2.56) .

Material

16 males, 16 females (including 1 male, 1 female paratypes of Columbicola guimaraesi ), ex Chalcophaps indica , Taiwan, Philippines, Nepal, Malaysia, India, New Hebrides (12) . 1 male, 1 female, ex C. stephani Pucheran , New Guinea (1).

Remarks

This species was originally described by Tendeiro (1965) as a complex of 2 subspecies, C. g. guimaraesi and C. g. grandiusculus . Tendeiro (1967) later added a third subspecies, C. g. vitiensis . After examining numerous individuals of each of the three subspecies, the differences between them were found to be quite noticeable, especially in the variation of the female ventral terminalia. For this reason, each of the three subspecies of C. guimaraesi is recognized as a full species. Although there is some size overlap, C. guimaraesi is the smallest of the guimaraesi group lice. Male identification is based on overall body dimensions and subtle differences in structure of the genitalia. The female is more easily identified by subgenital plate differences in the shape of the groove and the length and number of setae. The mesosome of C. guimaraesi has a reduced thickening on its lateral edges compared to C. vitiensis and C. grandiusculus . Individuals from the type host Chalcophaps indica , and those from C. stephani , were found to be indistinguishable, thus representing a new host record for C. guimaraesi .

Figures

Figures 19–39. Columbicola tschulyschman: (19) male genitalia; (20) female dorsal head; (21) female ventral terminalia. C. turturis: (22) male genitalia; (23) female ventral terminalia. C. keleri: (24) male genitalia; (25) female ventral terminalia. C. guimaraesi: (26) male dorsal head; (27) male genitalia; (28) female dorsal head; (29) female ventral terminalia. C. grandiusculus: (30) male dorsal head; (31) male genitalia; (32) female ventral terminalia. C. vitiensis: (33) male genitalia; (34) female ventral terminalia. C. meinertzhageni: (35) male dorsal head; (36) female dorsal head; (37) male genitalia; (38) female ventral terminalia. C. browni: (39) male dorsal head.

Figures 1–18. Columbicola columbae: (1) dorsal-ventral male. Columbicola male: (2) metanotal margin with two long, two short setal pattern; (3) metanotal margin with three long, one short setal pattern; (4) dorsoanterior head—a5anterior medial head setae (AMHS), b5posterior medial head setae (PMHS); (5) genitalia, width (GW); (6) body measurements—head length (HL), dorsoanterior head plate width (APW), head width (HW), scape length (SL), prothorax width (PW), metathorax width (MW), total length (TL). C. columbae: (7) male dorsal head (arrow5medioposterior head setae); (8) male genitalia; (9) female dorsal head; (10) female ventral terminalia. C. bacillus: (11) male genitalia; (12) female ventral terminalia. C. stresemanni: (13) male dorsal head; (14) female dorsal head. C. claviformis: (15) male dorsal head; (16) male genitalia; (17) female ventral terminalia. C. tschulyschman: (18) male dorsal head.