Laccodytes olibroides Régimbart, 1895

Toledo, Mario, Spangler, Paul J. & Balke, Michael, 2010, Taxonomic revision of the Neotropical diving beetles genus Laccodytes Régimbart, 1895 (Coleoptera: Dytiscidae), Zootaxa 2347, pp. 37-58 : 54

Laccodytes olibroides Régimbart, 1895

Figs (36, 43, 52, 62)

Laccodytes olibroides Régimbart (1895: 347) ; Peschet (1919: 146); Zimmermann (1920: 29); Nilsson (2001: 239).

Type locality. According to the original description, Mexico or Brazil ( Régimbart, 1895). However, considering that neither this species nor others of the genus have so far been found in Mexico, and that the male from BMNH studied here (see below) comes from Brazil (Rio de Janeiro), we suggest that Brazil is the more likely candidate.

Type material. According to Régimbart (1895), there is one specimen, the holotype, from Mr. D. de Donceel, housed in the MNHN. We did not study the type but a male from BMNH agrees well with the description and habitus drawing of this species, provided in the original description.

Material studied. “ Brasilia, Rio Jan” // “6005” (1 3 BMNH).

Diagnosis. Habitus ( Fig. 36 ). Body length 1.5 mm. Body almost discoidal. Tip of elytron continuously rounded. Hind angle of pronotum rounded. Without angle between pronotum and elytron.

Color. Head black. Pronotum yellow but anterior margin, posterior 2/5 and middle black. Elytron black with three orange spots ( Fig. 36 ) which are isolated and do not reach margin or suture; posteriorly slightly paler. Body appendages yellowish. Venter, including epipleuron, dark, reddish to blackish, prosternum orange.

Scultpure. Head with fine MR, same but much fainter MR on pronotum and elytron. Few small punctures visible anteriorly on metaventrite, few larger ones posteriorly. No longitudinal lines or longish meshes visible.

Structures. Pronotum with distinct lateral bead; posterior angle rounded. Prosternum and prosternal process with small ridge; prosternal process broadly carinate and with a long, nose-like tip emerging at a rather steep angle ( Fig. 43 ). Epipleuron distinct up to level of sternite 7. Fore and middle legs very long and slender. Metatarsomeres 1–4 with apico-lateral angle slightly lobed. Outer metatibial spur truncate. Hind lobes of metacoxal process divided by a deep V-shaped notch.

Male. Pro- and mesotarsi not dilated. Aedeagus ( Fig. 52 ): median lobe very similar to that of L. obscuratus but, in lateral view, even more slender on distal 2/3, with a step on ventral side between this and the base. Parameres as in L. obscuratus n.sp., but the right is more clubbed.

Female. Unknown.

Distribution ( Fig. 62). Apparently southeastern Brazil.

Biology. Unknown.

Figures

FIGURES 28 – 39. Subschematic body shape and colour patterns: 28) Laccodytes apalodes; 29) L. rondonia; 30) L. americanus; 31) L. phalacroides; 32) L. takutuanus; 33 a – 33 b) L. neblinae (variation of elytral patterns); 34) L. bassignanii; 35) L. obscuratus; 36) L. olibroides; 37) L. androginus; 38) Laccodytes sp. 1.; 39) Laccodytes sp. 2.

FIGURES 40 – 43. Line drawings of prosternal process: 40) Laccodytes takutuanus; 41) L. phalacroides; 42) L. rondonia; 43) L. olibroides.

FIGURES 48 – 53. Male genitals in Laccodytes species: 48) L. takutuanus: a) median lobe of aedeagus in dorsal view, b) in lateral view, c-d) right and left parameres; 49) L. neblinae: a) median lobe of aedeagus in dorsal view, b) in lateral view, c-d) right and left parameres; 50) L. bassignanii: a) median lobe of aedeagus in dorsal view, b-c) in dorsal-lateral and lateral view, d-e) right and left parameres; 51) L. obscuratus: a) median lobe of aedeagus in dorsal view, b) in lateral view, c-d) right and left parameres; 52) L. olibroides: a) median lobe of aedeagus in lateral view, b-c) right an left parameres; 53) L. androginus: a) median lobe of aedeagus in dorsal view, b) in lateral view, c-d) right and left parameres.