Dorynota (Dorynota) nodosa ( Boheman, 1854 )

Simões, Marianna V. P. & Sekerka, Lukáš, 2015, Review of the Neotropical Leaf Beetle SubgenusDorynota s. str. Chevrolat (Coleoptera: Chrysomelidae: Cassidinae: Dorynotini), The Coleopterists Bulletin 69 (2), pp. 231-254 : 242-244

Dorynota (Dorynota) nodosa ( Boheman, 1854) ( Figs. 23–25 )

Batonota nodosa Boheman, 1854: 160 (type locality: ‘Columbia’).

Type Material Examined. Syntype, pinned: ‘292 ∣ [illegible] [g, sl, hw on underside of a circle label] ∥ MUSÉUM PARIS ∣ Colombie ?

[ hw] [g, p, cb]’ ( MNHN); syntype , pinned: ‘ MUSEUM PARIS ∣ COLOMBIE ∣ C. PARZUDAKI 1840 [g, p, cb] ∥ 2899 ∣ 40 [g, sl, hw on underside of a circle label]’ ( MNHN) .

Diagnosis. Dorynota nodosa and D. rufomarginata are the only two species of the nominate subgenus that have a very short spine reminiscent of Akantaka species, which is triangular in frontal view and not projecting above the base. All Akantaka species can be easily separated by the following combination of characters: the lateral sides of the elytra straight, not concave behind the humeral angles; and dorsal spine in lateral view with apex not markedly narrower than base, followed by gradual and continuous slope. Both species are externally quite similar, but D. nodosa has the elytra with a thin, black outer margin with the lateral margins more concave, while D. rufomarginata has a uniformly pale elytral margin and lateral margins less concave and subparallel.

Remarks. Dorynota nodosa has been misidentified in the past with some populations of Dorynota (Akantaka) insidiosa ( Boheman, 1854) from Central America because no author examined the type specimen deposited in the MNHN. Dorynota nodosa has a short spine and distinctly concave lateral elytral margins, which certainly place it in nominate subgenus. All Mesoamerican specimens we have seen so far have straight or slightly convex lateral elytral margins and an even shorter spine, thus they belong to a yet probably undescribed species of Akantaka . Spaeth (1923) synonymized D. pugnax with D. nodosa , and since then the species was considered a synonym. We have examined type of D. pugnax and found that it is quite different from D. nodosa and rather similar to D. monoceros . Therefore, it is removed from synonymy with D. nodosa (see remarks under D. pugnax ). Published records of D. nodosa (i.e., Champion 1893; Chaboo 2002) quite likely belong to other species, therefore we retain only Colombia in the distribution of D. nodosa .

Distribution. Colombia ( Boheman 1854).

Figures

Figs. 23–31. Dorynota (s. str.) species. 23) D. nodosa from Colombia, dorsal view; 24) D. nodosa, frontal view; 25) D. nodosa, lateral view; 26) D. ohausi from Ecuador (Zamora-Chinchipe), dorsal view; 27) D. ohausi, lateral view; 28) D. parallela from Brazil (Goiás), dorsal view; 29) D. parallela, lateral view; 30) D. pugionata from Brazil (Rio de Janeiro), dorsal view; 31) D. pugionata, lateral view.