Triarius nigroflavus Riley, Clark, and Gilbert, 2001

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: 352-353

publication ID

http://doi.org/ 10.1649/0010-065X-73.2.343

publication LSID

lsid:zoobank.org:pub:urn:lsid:zoobank.org:pub:0DA77902-AD7C-461E-9D8E-90862D41E67C

persistent identifier

http://treatment.plazi.org/id/434B8790-CE3E-FFA2-9EAE-FB04D2BA26E4

treatment provided by

Plazi

scientific name

Triarius nigroflavus Riley, Clark, and Gilbert, 2001
status

 

Triarius nigroflavus Riley, Clark, and Gilbert, 2001  

Figs. 2d– e View Fig , 3b View Fig

Luperodes flavoniger Blake 1942: 64  

Triarius flavoniger: Wilcox 1965: 166  

Triarius nigroflavus Riley, Clark, and Gilbert 2001: 7   [replacement name for Luperodes flavoniger Blake   (not Luperodes flavonigrum Laboissière, 1925   )]

Diagnosis. The tarsal claws of this species are bifid. In males ( Fig. 2d View Fig ), the pronotum and elytra are black, and the head is reddish brown (sometimes dark basally). In females ( Fig. 2e View Fig ), each elytron is yellow with a lateral dark stripe that does not attain the epipleuron and a dark sutural stripe; no short median stripe is present. Also, the female terminal abdominal sternite is mostly pale but narrowly dark apically, and the distal half of the hind femur is mostly black. These characters

enable recognition of this species (males and females) and distinguish it from all other New World Scelidites. Specimens measure about 6.2 mm in length.

Type Material Examined. We studied the male holotype and one paratype of L. flavoniger   ( USNM). The holotype is adequately labeled with locality, date, and collecting information. However, the other specimen, although clearly labeled as a paratype, lacks a collecting label.Perhaps,the label was inadvertently removed and lost. Contrary to Blake’ s (1942) statement, the paratype is male, not female.

Type Locality. “El Toro, Orange County, Calif.”  

Geographic Distribution. We examined specimens only from Orange County, California.

Temporal Distribution. We examined adults collected in May and June.

Plant Association. This species is reported from Adenostoma fasciculatum ( Clark et al. 2004)   . Specimens labeled with this association are included in the material we examined.

Comments. Blake (1942) based her original description of L. flavoniger   on only two specimens, the male holotype and a paratype that she indicated to be female. In actuality, both specimens are male. This mistake has probably fostered the misunderstanding that the pronotum and elytra of females are like those of males, entirely dark. Contrary to this notion, the coloration is very different, as noted in the diagnosis above. In addition to the type material, we examined 21 other specimens.

USNM

Smithsonian Institution, National Museum of Natural History

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Chrysomelidae

Genus

Triarius

Loc

Triarius nigroflavus Riley, Clark, and Gilbert, 2001

Clark, Shawn M. & Anderson, E. Russell 2019
2019
Loc

Triarius nigroflavus

Riley, Clark, and Gilbert 2001: 7
2001
Loc

Triarius flavoniger:

Wilcox 1965: 166
1965
Loc

Luperodes flavoniger

Blake 1942: 64
1942
Loc

Luperodes flavoniger

Blake 1942
1942
Loc

Luperodes flavonigrum Laboissière, 1925

Laboissiere 1925
1925