Praocis (Hemipraocis) sellata subsp. peninsularis

Autor: Flores, Gustavo E., Carrara, Rodolfo, Cheli, Germán H.
Rok vydání: 2011
Předmět:
DOI: 10.5281/zenodo.6191891
Popis: Praocis (Hemipraocis) sellata peninsularis Flores and Carrara ssp. nov. (Figs. 3, 7) Diagnosis. Praocis (Hemipraocis) sellata peninsularis ssp. nov. may be identified by the pronotum with punctures the same size or larger than elytral protuberances, elytron with three dull secondary carinae, surface between main carina and suture with protuberances not arranged, and main carinae weakly raised, same height as suture (Fig. 3). It differs from P. (Hemipraocis) sellata bergi Kulzer which has pronotum with punctures smaller than elytral protuberances, elytron with three shiny secondary carinae, surface between main carina and suture with one secondary carina and two spaces with protuberances arranged longitudinally, and main carinae very raised, higher than suture (Fig. 4). Description. Length 8-10 mm. Rounded habitus, body colour dull black, antennae and legs black to dark brown. Head. Clypeus densely punctured, with abundant setae, without depressions in anterior angles; frons higher than clypeus, with sparse punctures; antennae reaching midpoint of lateral margin of pronotum; antennomeres 9, 10 and 11 wider than long; tomentose sensory patches on apical surface of antennomere 11. Pronotum with large punctures, more abundant on lateral quarters, punctures same size or larger than elytral protuberances; dorsal surface of lateral margin with punctures, each bearing one long black seta, forming a row; anterior angles rounded, posterior angles acute (Fig. 3); prosternal process subrectangular forming a right angle, not produced backwards. Elytron (Fig. 3) with one main raised carina and three dull, weakly demarcated, secondary carinae, between main carina and lateral margin; spaces between secondary carinae with longitudinally arranged protuberances, some of them bearing one seta; secondary carinae wider than spaces; main carina the same height as suture; area between main carinae and suture flat, with protuberances not arranged; main carinae converging at apex of elytra; lateral margin broad, rounded, adjacent to elytron, with a row of black setae arising from protuberances; pseudopleuron with abundant setae arising from protuberances. Legs. Protibiae with apical process equal to length of protarsomeres 1���4; meso and metatibiae with a row of long, black setae on inner margin. Type material. Holotype, male (Fig. 3): [Argentina, Chubut, Pen��nsula/ de Vald��s, Pto. Pir��mides/ 16 -I- 2008, G. y L. Flores / G. Cheli, F. Flores] [42 �� 34 ��� 24.4 ���S / 64 �� 16 ��� 59.8 ���W / 0 m] [Praocis (Hemipraocis)/ sellata peninsularis ssp. nov. / HOLOTYPUS male/ Det. G. Flores and/ R. Carrara 2011] (IADIZA). Allotype, female: [Pa. Vald��s, Chubut/ II- 1971, Arg.] [Leg.: J.H. Molinari] (IADIZA). All paratypes with data: Argentina, Chubut, Pen��nsula Vald��s: 2 paratypes with the same data as holotype (1 MACN, 1 IADIZA); Puerto Pir��mides, 20 -IX-2010, 42�� 34 ��� 30.36 ���S / 64 �� 16 ��� 11.28 ���W / 37 m, G. Cheli, 1 (ENTCNP), 9 -III- 1940, R. Maldonado, 1 (MLPA), D. Rojas, 28 -III- 1997, 1 (IADIZA), S. Roig, 1-5 -XI- 1983, (3 IADIZA, 1 HNHM, 1 NHMB); 4 km N Playa Pardelas/ 42 �� 37 ��� 05.5���S, 64 �� 16 ��� 11.3 ���W, 38 m / 10 -I- 2010, G. Flores, G. Cheli, R. Carrara, 1 (IADIZA); 16 -II- 1997, D. Rojas Lan��s, 1 (IADIZA); Ea. Los M��danos/ 29 -XI- 2007, G. Cheli/ 42 �� 42 ��� 12.6 ���S / 64 �� 06��� 03.8���W / 76 m, 1 (ENTCNP), same data except: 3 -XI- 2006, G. Cheli, 1 (ENTCNP). Etymology. We named this new subspecies peninsularis because it is endemic to Peninsula Vald��s. Distribution and habitat. Praocis (Hemipraocis) sellata peninsularis inhabits the southern half of Peninsula Vald��s (Fig. 7) and can be found in sandy places. It shares the habitat with other tenebrionid species such as Emmallodera crenatocostata crenatocostata Blanchard, E. hirtipes Kulzer, Epipedonota cristallisata (Lacordaire), Nyctelia circumundata Lesne, N. dorsata Fairmaire, Patagonogenius collaris (Kulzer), Platesthes kuscheli (Kulzer), Psectrascelis sulcicollis (Waterhouse), Salax lacordairei Gu��rin-M��neville, and Leptynoderes strangulata Fairmaire. Ecological notes. This species inhabits the southern part of Pen��nsula Vald��s, where eolian dunes are developed on deep, salt-free, loose sandy soils (Rostagno 1981). These dunes are fixed by dense herbaceous steppe vegetation with Sporobolus rigens, Nassella tenuis, and Hyalis argentea (Bertiller et al. 1981). We observed adults of this subspecies walking on coastal dunes of Puerto Piramides at twilight during the summer and in the afternoon in early spring.
Published as part of Flores, Gustavo E., Carrara, Rodolfo & Cheli, Germ��n H., 2011, Three new Praociini (Coleoptera: Tenebrionidae) from Peninsula Vald��s (Argentina), with zoogeographical and ecological remarks, pp. 39-50 in Zootaxa 2965 on pages 42-43, DOI: 10.5281/zenodo.205983
{"references":["Rostagno, C. M. (1981) Reconocimiento de suelos de la Peninsula de Valdes e Istmo Ameghino, Chubut. Contribucion Nº 44, Centro Nacional Patagonico (CONICET), Puerto Madryn. 24 pp.","Bertiller, M. B., Beeskow, A. M. & Irisarri, M. (1981) Caracteres fisonomicos y floristicos de la vegetacion del Chubut. 2. Peninsula Valdes e istmo C. Ameghino. Contribucion Nº 41, Centro Nacional Patagonico (CONICET), Puerto Madryn. 20 pp."]}
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