Malthoneakeili, Santos-Silva & Galileo & McClarin, 2018

Santos-Silva, Antonio, Galileo, Maria Helena M. & McClarin, Jim, 2018, A new species of Malthonea Thomson, 1864 (Coleoptera, Cerambycidae, Lamiinae) from Ecuador, Papéis Avulsos de Zoologia 58, pp. 5-5 : 4

Malthoneakeili , sp. nov.

( Figs. 1‑4 )

Description: Female: Integument nearly entirely black; parts of pro- and mesocoxae and pro- and mesotrochanters reddish; tarsal claws reddish. Pubescence mostly yellowish white (more grayish white depending on angle of light source).

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Head: Frons transverse, finely, moderately abundantly punctate; pubescence partially obscuring integument. Vertex finely, more sparsely punctate than on frons; pubescence denser centrally, except glabrous, narrow area along median groove, between antennal tubercles and middle of area between eyes and prothorax; remaining surface with brownishyellow pubescence exposing integument. Median groove distinct from middle of frons to prothoracic margin. Area behind eyes finely, sparsely punctate behind upper eye lobe, gradually with more abundant punctures toward lower eye lobe; pubescence less abundant exposing integument toward vertex, denser toward apex of upper eye lobe, then sparser toward gena. Gena with sculpturing and pubescence as on frons, except smooth, glabrous distal area. Antennal tubercles, in frontal view, moderately elevated, their inner margins V-shaped; basally with sculpturing and pubescence as on frons, gradually finer, sparsely punctate and sparser pubescent toward apex. Labrum almost coplanar with anteclypeus on basal half, inclined on distal half, with long, erect, moderately sparse yellowish setae and fringe of yellow setae at distal margin. Gulamentum smooth, glabrous except for sparse pubescence close to mentum. Distance between upper eye lobes 0.49 times length of scape; in frontal view, distance between lower eye lobes 0.42 times length of scape. Antennae 1.7 times elytral length, reaching elytral apex at distal third of antennomere VIII; scape cylindrical, with sparse pubescence, interspersed with sparse, long, erect dark setae ventrally; pedicel and antennomeres III-VII with long, erect, sparse dark setae ventrally; antennal formula (ratio) based on length of antennomere III: scape = 0.86; pedicel = 0.12; IV = 0.88; V = 0.60; VI = 0.56; VII = 0.50; VIII = 0.46; IX = 0.42; X = 0.40; XI = 0.44.

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Thorax: Prothorax slightly wider than long (1.1 times), including lateral tubercles; lateral tubercles small, spiniform, placed at middle. Pronotum raised from apex of basal third, moderately coarsely, abundantly punctate; pubescence partially obscuring integument on basal half centrally and laterally on distal half, sparser on distal half between central and lateral areas. Sides of prothorax with sculpturing and pubescence as on pronotum. Prosternum finely, moderately sparsely punctate; pubescence not obscuring integument. Mesoventrite coarsely punctate; pubescence not obscuring integument. Mesanepisternum, mesepimeron and metanepisternum with pubescence nearly obscuring integument. Metaventrite finely, sparsely punctate laterally; pubescence partially obscuring integument laterally, gradually sparser toward center. Scutellum with pubescence partially obscuring integument.

Elytra: Not longitudinally carinate, moderately coarsely, abundantly punctateon basal half, gradually finer, spars- er toward apex; pubescence not obscuring integument interspersed with a few short, erect dark setae dorsally (especially on distal third), and long, erect dark setae laterally on distal fifth; apex truncate, with long spine at outer angle (twice length of pedicel, 0.25 times pronotal length).

Legs: Pro- and mesofemora subfusiform, metafemora more elongate, with pubescence not obscuring integument. Metatarsomere Iabout as long as II-III together.

Abdomen: Ventrites finely, sparsely punctate laterally (punctures nearly indistinct due pubescence); pubescence partially obscuring integument; distal margin of ventrite V truncate.

Dimensions (mm): Total length, 6.0; prothoracic length, 1.0; basalprothoracic width, 0.9; distalprothoracic width, 1.0; largest prothoracic width, 1.1; humeral width, 1.3; elytral length, 4.4.

Type material: Holotype female from ECUADOR, Pichincha: Route 20 (between 24 and 30.5 km from intersection with Route 35), 26.XI.2016, J. McClarin col. ( QCAZ) .

Etymology: Named for Clifford Keil (QCAZ) to recognize his contribution for sending specimens collected by the third author to be identified in the Museum of Zoology, University of São Paulo, Brazil.

Remarks: Malthoneakeili sp. nov. is similar to M. minima Martins & Galileo, 1995 , but differs as follows: prothorax shorter ( Fig. 1 ); elytra sparsely punctate distally ( Fig. 2 ); elytra without brownish maculae laterally ( Fig. 1 ). In M. minima , the prothorax is more elongate ( Fig. 7 ), the distal area of the elytra is denser punctate ( Fig. 8 ), and the elytra have brownish maculae. According to Martins & Galileo’s (1995 b) description of the elytra of M. minima (translated):“Elytra with whitish pubescence, denser laterally, interspersed with brownish pubescent maculae (about seven along margin).” The brownish maculae are not present in the paratype of M. minima ( Fig. 7 ).

Figures

Figures 1-8.(1‑4) Malthoneakeilisp.nov.(1‑4) holotypefemale:(1) dorsalhabitus;(2)ventral habitus;(3) lateralhabitus;(4)head,frontalview.(5,7‑8)Malthonea minima Martins & Galileo, 1995, paratype female (?): (5) head, frontal view; (7) dorsal habitus; (8) ventral habitus.(6) Malthonea cuprascens (Waterhouse, 1880), holotype, measuring points of the length of the elytral spine (adapted from Nearns &Tavakilian,2012).