Heptagoniodes Carriker, 1936

Valim, Michel P. & Silveira, Luís F., 2014, A new species and five new records of chewing lice (Insecta: Phthiraptera: Ischnocera) from an isolated population of the solitary tinamou Tinamus solitarius (Aves: Tinamiformes), Zootaxa 3838 (1), pp. 127-142 : 129

publication ID

https://doi.org/ 10.11646/zootaxa.3838.1.8

publication LSID

lsid:zoobank.org:pub:E5B7BE11-CC19-440A-9152-AACE16B4F041

DOI

https://doi.org/10.5281/zenodo.6134782

persistent identifier

https://treatment.plazi.org/id/03C987D7-CA1E-A25F-1BC3-FE8440DBF9AB

treatment provided by

Plazi

scientific name

Heptagoniodes Carriker, 1936
status

 

Heptagoniodes Carriker, 1936

Heptagoniodes Carriker, 1936: 166 (Type species: H. mirabilis Carriker, 1936 , by original designation); Guimarães & Lane

(1937: 7); Kéler (1938: 323); Guimarães (1942a: 16); Carriker (1944: 207).

Kelloggia (Heptagoniodes) View in CoL ; Guimarães (1948: 163).

Kelloggia Carriker, 1903 View in CoL (in part); Hopkins & Clay (1952: 166); Price et al. (2003: 189).

Heptagoniodes contains four known species, plus one described below as new; all of them are restricted to hosts of the genus Tinamus View in CoL . Our study of specimens of Heptagoniodes of four species held in the MZUSP collection allowed us to give here an emendation of the generic diagnosis presented by Carriker (1936) and Guimarães (1942a, 1948), and a comparison with its morphologically close relatives.

Heptagoniodes is morphologically close to Kelloggia Carriker, 1903 View in CoL and Ornicholax Carriker, 1903 having each side of the first visible tergo-pleurite (= I+II) entirely surrounded anteriorly by the metanotum and laterally by tergo-pleurites III. The first and second visible tergo-pleurites overlap those sclerites in segment III ( Figs 1–2 View FIGURES 1 – 2 ). Species of Ornicholax have well developed coni and the antennae are inserted at mid-point of the head lateral margins, whereas in Heptagoniodes and Kelloggia View in CoL the coni are absent and the antennae are inserted near the front of the head lateral margins. Both sexes of Heptagoniodes can be promptly distinguished from Kelloggia View in CoL by the absence of serration in the postero-lateral margin of the pterothorax ( Fig. 7 View FIGURES 3 – 8. 3 ), which is quite conspicuous in the latter genus ( Figs 6, 8 View FIGURES 3 – 8. 3 ). Species of Heptagoniodes have sexually dimorphic antennae (males have the scapus and pedicel swollen and the first flageromere with a dorsal finger-like projection) and a deep post-ocular emargination ( Figs 3–4 View FIGURES 3 – 8. 3 ). The head of Kelloggia View in CoL males is similar to those of the females (see Fig. 6 View FIGURES 3 – 8. 3 ). Another important character to distinguish both genera is head chaetotaxy: in both sexes of Heptagoniodes , the pns (postnodal seta) and pts (postemporal seta) are developed into distinct setae ( Figs 4–5 View FIGURES 3 – 8. 3 ), while in Kelloggia View in CoL they are like sensilla ( Fig. 6 View FIGURES 3 – 8. 3 ); in males of Heptagoniodes four (s3–s6) of the six head sensilla placodea are developed into well-formed setae, while in Kelloggia View in CoL the s1–s6 are sensilla in all species ( Fig. 6 View FIGURES 3 – 8. 3 ). Furthermore, the shape of the mesosome in the male genitalia of both genera is different (compare Fig. 9 View FIGURES 9 – 12 vs Figs 10–12 View FIGURES 9 – 12 ).

The head sexual dimorphism of Heptagoniodes is phylogenetically informative as discussed by Guimarães (1948). The male head emargination is an important character to distinguish the genus Heptagoniodes into two main species groups (see Figs 3–4 View FIGURES 3 – 8. 3 and key below). The head shape in species of Kelloggia View in CoL and Heptagoniodes implies different copulation strategies, and this feature alone supports their generic separation ( Guimarães 1948: 163).

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Phthiraptera

Family

Philopteridae

Loc

Heptagoniodes Carriker, 1936

Valim, Michel P. & Silveira, Luís F. 2014
2014
Loc

Kelloggia

Price 2003: 189
Hopkins 1952: 166
1952
Loc

Kelloggia (Heptagoniodes)

Guimaraes 1948: 163
1948
Loc

Heptagoniodes

Carriker 1936: 166
1936
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