Triariodes vittipennis ( Horn, 1893 ) Clark & Anderson, 2019

Clark, Shawn M. & Anderson, E. Russell, 2019, A Review Of Triarius Jacoby, 1887 (Coleoptera: Chrysomelidae: Galerucinae: Luperini), With Descriptions Of A New Genus And Four New Species, The Coleopterists Bulletin 73 (2), pp. 343-357 : 348-349

Triariodes vittipennis ( Horn, 1893) , new combination

Fig. 1a, d, g

Malacosoma vittipenne Horn 1893: 123

Exosoma vittipenne: Leng 1920: 298

Exora (Exora) vittipennis: Weise 1924: 99 Triarius vittipennis: Wilcox 1965: 167

Diagnosis. The vittate elytra ( Fig. 1a ), in combination with the appendiculate tarsal claws, distinguish this species from others in the similar genus Triarius . The largely pale brown head and femora, and especially the distinctive aedeagus ( Fig. 1g ), easily distinguish this from the other known species of Triariodes.

Type Material Examined. We examined two syntypes of M. vittipenne in the Horn Collection ( MCZ). Both are female. One of them bears the following three labels: “Tex,” “ LectoType 3795,” and “ Malacosoma vittipenne Horn. ” It is not clear who added the lectotype label to the specimen, and, to our knowledge, a lectotype designation has never been published. In any case, this specimen is now designated as the lectotype for M. vittipenne .

Type Locality. “ Occurs in southwestern Texas, precise region unknown.” ( Horn 1893) .

Geographic Distribution. We examined specimens from Chaves and Eddy Counties in New Mexico, and from Brewster, Crockett, Culberson, El Paso, Jeff Davis, Presidio, Terrell, Uvalde, and Val Verde Counties in Texas. Also, we saw two old specimens labeled from Arizona (UMRM), but we doubt the authenticity of this record.

Temporal Distribution. We saw adults collected from March to October.

Plant Associations. This species is reported from Prosopis L. and flowers of Acacia angustissima var. hirta (Nutt.) B. L. Robbins (both Fabaceae ); Condalia Cav. (Rhamnaceae) ; Fallugia paradoxa (D. Don) Endl. ex Torr. in Emory (Rosaceae) ; and Solanum elaeagnifolium Cav. (Solanaceae) ( Wilcox 1965; Goeden 1971; Ward et al. 1977; Clark et al. 2004). Beyond this, we examined specimens labeled as from blossoming Acacia greggii A. Gray (Fabaceae) .

Comments. Beyond the type material mentioned above, we examined 390 other specimens.

Figures

Fig. 1. Triariodes species. Dorsal habitus: A) T. vittipennis, B) T. segonku, C) T. admiratio. Head: D) T. vittipennis, E) T. segonku, F) T. admiratio. Aedeagus, dorsal and lateral views: G) T. vittipennis, H) T. segonku, I) T. admiratio.