Colliuris tristigma ( Bates, 1883 )

Bousquet, Yves, 2010, Review of the Nearctic, Mexican and West Indian (Greater Antilles) species of Colliuris Degeer (Coleoptera: Carabidae: Odacanthini), Zootaxa 2529, pp. 1-39 : 29-31

Colliuris tristigma ( Bates, 1883)

Casnonia tristigma Bates, 1883: 161 . Type locality: «Tocoy, Guatemala » (original citation). Colliuris tristigma: Liebke (1930: 660) .

Type material. Bates original description of this species was based on a single specimen. The holotype, a male, housed in BMNH, is labelled: " Type H.T. [white round label with red trims]/ Tocoy, Vera Paz. Champion./ B.C.A. Col. I.1. Casnonia tristigma, Bates. / Casnonia tristigma Bates [handwritten]/ HOLOTYPE ɗ Casnonia tristigma Bts By Erwin ‘76 [partly handwritten]".

Description. COLOR. Body reddish-brown to dark reddish-brown dorsally, elytron with two yellowish spots, one rather large, more or less rounded at middle and one, preapical, more or less triangular around suture; antenna more or less uniformly pale reddish-brown with antennomere 1 usually slightly infuscate above and antennomeres 5–11 slightly darker in many specimens; leg yellow to pale brownish-yellow with apical extremity of femur infuscate. MICROSCULPTURE. Frons with more or less isodiametric meshes on centre, vertex with transverse meshes. Pronotum with slightly to moderately transverse meshes. Proepisternum and prosternum with markedly transverse meshes. Elytra with longitudinally stretched meshes. PROTHORAX. Anterior edge of pronotum without lateral dentiform projection. ELYTRA. Interval 3 with four setae. Striae coarsely punctate on anterior half or so, shallowly impressed on posterior half or so. MALE GENITALIA. Median lobe as illustrated ( Fig. 2 ).

Body length: 5.2–6.5 mm.

Geographical distribution. This species ranges from central Mexico south at least to Panama and Venezuela. I have seen specimens of this species, besides Mexico (see Fig. 25 ), from Belize (Toledo and Stann Creek Districts); Honduras (Atlántida and Francisco Morazán Departments), Costa Rica (Guanacaste Province), Panama (Colón Province), and Venezuela (Portuguesa State).

Records. Mexico. CHIAPAS. 0.5 km N "Parque Nat. Laguna Belgica " (1, FSCA). Yaxoquintela (1, CMNH). 11 mi. SE Venustiano Carranza (7, CNC, UASM). Catazajá (1, UASM). 6 mi. W Cintalapa (12, UASM). Tapachula (1, TAMU). 4.9 mi. N Frontera Comalapa (2, UASM). Palenque (2, CNC, UASM). 21.7 mi. N Palenque (1, CNC). OAXACA. 3 mi. NE Putla (1, TAMU). Palomares (2, CNC, UASM). 6 km E Pinotepa (1, CMNH). 1.7 mi. W Zanatepec (2, UASM). 12 km W Palomares (1, CAS). 13.8 mi. W Zanatepec (9, CNC, UASM). QUINTANA ROO. Nuevo X-can (1, CMNH). SAN LUIS POTOSÍ. Ciudad Valles (1, CUIC).

TABASCO. Teapa (9, CUIC); Ciudad Pemex (1, UASM). 59.4 mi. SE Villahermosa (4, UASM). VERACRUZ. Atoyac, 5 mi. SSW Paso del Macho (2, CUIC); Cotaxtla (3, CNC). Jalapa (1, CNC). 2.5 mi. W Sontacomapan (4, UASM). Montepio, 8 mi. N. Sontecomapan (1, CNC).

Habitat. The following labels were attached to some of the specimens studied: Typha marsh; marsh; at light.

Note. I have seen the type of C. trimaculata Liebke from Brazil in MNHU and it is structurally very similar to, if not conspecific with C. tristigma (Bates) .

BIVITTIS GROUP

Diagnostic description. Body without pubescence dorsally. HEAD. Vertex short. Posterior supraorbital seta located at or before level of posterior edge of eye. PROTHORAX. Pronotum with relatively coarse punctures all over, with or without transverse wrinkles, without dorsal swelling; lateral groove indistinct; side without or with one seta. Proepisternum with coarse, dense punctures; prosternum with punctures, slightly finer and sparser than on proepisternum. ELYTRA. Lateral edge extended anteriad humerus. Discal setae not black, not really stiff. Interval 3 with setae, interval 5 with or without setae, interval 7 without setae. ABDOMEN. Sterna without pubescence; last sternum of male with median notch along apical edge.

Note. This group is mainly characterized by the presence of punctures all over the pronotum.

Two species found in the area covered by this work are placed in this group. One of them, C. bivittis was included in the subgenus Colliurita Liebke, 1938 (type species: C. multifoveolata Liebke ), along with C. liodiscus Chaudoir ( Brazil) , C. longipennis Chaudoir ( Brazil) , and C. variolosa Chaudoir ( Colombia) , by Liebke (1938: 70). I have not seen any specimens of the other species. The second species, C. tubulifera Bates , was placed in the subgenus Colliurella Liebke, 1930 (type species: Colliuris flavicornis Brullé ) along with C. amoena Chaudoir ( Columbia) , C. cosciniodera Chaudoir , C. elongata Fabricius ( Surinam) , C. flavicornis Brullé ( Brazil) , C. gestroi Liebke ( Argentina) , C. lagoenicollis Liebke ( Brazil, Paraguay), C. puncticollis Chaudoir ( Brazil; French Guiana), C. strandi Liebke ( Panama) , C. subtilis Sahlberg ( Brazil) , C. umbrigera Chaudoir ( Brazil) , and C. variabilis Liebke ( Brazil) by Liebke (1938: 57). Of the species include by Liebke (1938) in Colliurella , I have seen syntypes of C. cosciniodera and believe it is closely related to both species includes in this group.

Figures

FIGURE 25. Collection localities for Colliuris tristigma (Bates) in Mexico.

FIGURES 2 – 9. Median lobe of Colliuris. 2. C. tristigma; 3. C. pensylvanica; 4. C. lengi; 5. C. sulcicauda; 6. C. marginestriata; 7. C. noah; 8. C. pilatei; 9. C. subdistincta.