Amydetes discissa Olivier 1908
Creators: name: Silveira, Luiz Felipe Lima Da
name: Mermudes, José Ricardo M.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Lampyridae
Amydetes
Amydetes discissa

description: Amydetes discissa Olivier, 1908
(Figs. 3, 25, 44, 63, 81, 109, 127, 155–159)
Amydetes discissus Olivier, 1908: 493; Blackwelder, 1957: 360 (lis.); McDermott, 1966: 77 (cat.).
Diagnosis. Fronto-clypeus slightly depressed up to antennal sockets. Antennomere III with flabellum as long as antennomere III. Pronotum with posterior angle projected and deflexed. Hypomeron 2x longer than wide. Abdominal sternum V with posterior margin straight. Pygidium with median lobe almost as wide as posterior margin width, rounded and longer than lateral lobe, which is rudimentary.
Colouration. (Fig. 3) Integument brown. Pronotum with expansions, suture and elytral margins pale yellow.
Head. (Figs. 25, 44) Fronto-clypeus discreetly depressed up to antennal sockets; anterior margin 3/5 wider than distance between antennal sockets, as wide as distance between antennifers. Antenna with 35–43 antennomeres (n=3); antennomere III as long as pedicel, with flabellum of antennomere III as long as antennomere III. Gular sutures as separeted as maxillary palpomere IV width. Labrum with anterior margin rounded or straight. Maxillary palpomere IV 4x longer than III, and 1/3 longer than labial palpomere III.
Thorax. (Figs. 63, 81) Pronotum with lateral margins divergent posteriad, with posterior angle acute, projected and deflexed; setigerous punctures irregularly separeted 1– 2 x the diameter of a puncture. Hypomeron 2x longer than high. Prosternum with anterior margin sinuous, with no sagittal indentation. Scutellum with lateral margins convergent posteriad. Elytron subparallel-sided, marginal costa with anterior margin projected. Mesosternum with posterior margin acute.
Abdomen. (Figs. 109, 127, 155–159) Abdominal sternum V with posterior margin straight. Abdominal sternum VI with lantern as long and wide as 1/2 sternum length and width. Abdominal sternum VII with lantern as long as 4/5 sternum length and as wide as 2/3 sternum width. Abdominal sternum VIII with posterior margin straight or irregular, not medially projected. Pygidium with median lobe almost as wide as posterior margin width, rounded and longer than lateral lobe, which is rudimentary. Terminalia: Syntergite with anterior margin acuminate
1. Modified from Olivier, 1907 and posterior asymmetric. Suture between abdominal tergites IX and X conspicuous. Abdominal sternum IX 2x longer than syntergite; 2x longer than wide, wider at posterior 1/3; posterior margin sinuous; lateral margins strongly divergent at the anterior 2/3; bristled at posterior 1/3. Aedeagus: Phallobase asymmetric. Parameres divergent posteriad, with apices truncate. Phallum 2x longer than paramere, bent close-setly 70° in relation to paramere, with apex rounded, ventral plate straight, distal part less sclerotized.
Type-material. Lectotype designated, deposited at MNHN, ex-coll. Ernst Olivier. Labels: Santos 18.8 [green label]; discissus Oliv. [light-brown label]; LECTOTYPE [red label]. This specimen could not be considered a holotype because MNHN curators suspect that Olivier could have studied more specimens, which he deposited at other collections.
Remarks. Olivier (1908) stated A. discissa from Paraguay. However, Lectotype's label states only “Santos”. However, we found other specimens of this species in the state of São Paulo, Brazil, but found no Paraguayan city with this name. Therefore, we consider a possible misinterpretation by the author. A. discissa resembles A. fastigiata (Fig. 4) and A. manezinha sp. nov. (Fig. 9). A. discissa It differs from the former by abdominal sternum V with posterior margins straight (emarginate in A. fastigiata) and pedicel as long as antennomere III (longer than antennomere III in A. fastigiata). A. discissa differs from the latter by maxillary palpomere IV 4x longer than III (2x longer in Amydetes manezinha sp. nov.) and pronotum with posterior angle deflexed (straight in Amydetes manezinha sp. nov.).
Material examined. BRAZIL. São Paulo: Barueri, 2 males, 21/IV/1956, O. P Keller col. (MZSP); [Cubatão] (Raiz da Serra), 2 males, 28/IX/1907, H. Lüderwaldt col. (MZSP).
description: Published as part of Silveira, Luiz Felipe Lima Da & Mermudes, José Ricardo M., 2014, Systematic review of the firefly genus Amydetes Illiger, 1807 (Coleoptera: Lampyridae), with description of 13 new species, pp. 201-248 in Zootaxa 3765 (3) on pages 209-210, DOI: 10.11646/zootaxa.3765.3.1, http://zenodo.org/record/252104