Morrisia skillmani, Gutiérrez & Santos-Silva, 2022

Gutiérrez, Nayeli & Santos-Silva, Antonio, 2022, Description of two new species of Apomecynini (Coleoptera, Cerambycidae, Lamiinae), American Museum Novitates 2022 (3985), pp. 1-12 : 3-4

Morrisia skillmani , sp. nov.

Figures 1A–D , 3C, F, I

DESCRIPTION: Holotype male. Integument mostly black; ventral mouthparts reddish brown; anteclypeus reddish brown posteriorly, brown anteriorly; labrum brown on posterior 2/3, reddish brown on anterior third; scape mostly dark brown; pedicel and antennomeres III–XI brown (III and IV dark reddish brown depending on light intensity). Ventral surface of abdomen partially dark reddish brown centrally.

HEAD: Frons, vertex, area behind eyes, genae, and postclypeus coarsely, abundantly punctate; with short, thick white seta in nearly all punctures; with minute yellowish setae, absent on some areas, sparse or slightly abundant on others; area behind upper eye lobes with a few long, erect brown setae close to eye; anterior margin of postclypeus with yellowish-brown setae directed forward. Labrum coplanar with anteclypeus at posterior quarter, gradually inclined at anterior 3/4; coplanar area glabrous, except a few short white setae on central region close to inclined area; inclined area with moderately long, erect yellowish-brown setae not obscuring integument; anterior margin with dense fringe of yellowish-brown setae. Eyes divided; lower eye lobes with 10 rows of ommatidia (fig. 3C); distance between upper eye lobes 0.46× distance between outer margins of eyes; in frontal view, distance between lower eye lobes 0.68 times distance between outer margins of eyes. Antennae 1.1× elytral length, almost reaching posterior third of elytra. Scape coarsely, moderately shallowly punctate; with thick, decumbent, yellow and white setae not obscuring integument, distinctly sparser ventrally. Pedicel and antennomeres III–IX with short, decumbent yellow and white setae (white setae gradually sparser toward VII dorsally, absent dorsally on VIII and IX); dorsal surface of antennomeres VIII–IX with brownish pubescence and short, suberect brownish and yellowish-brown setae interspersed; antennomeres X–XI with pubescence mostly brownish. Antennal formula based on length of antennomere III: scape = 0.51; pedicel = 0.19; IV = 0.57; V = 0.29; VI = 0.24; VII = 0.24; VIII = 0.21; IX = 0.19; X = 0.19; XI = 0.29.

THORAX: Prothorax longer than wide; coarse, dense, deep punctures gradually finer toward prosternum; sides slightly, uniformly rounded from anterolateral angles to posterolateral angles; nearly all punctures with small brownish seta; area between punctures with minute, thick, very sparse yellow setae, absent on wide central area of pronotum, except on anterior quarter; with a few tufts of short, thick yellow setae on sides and part of central area of pronotum; wide central area of pronotum with sparse, short brownish setae among punctures. Narrowest area of prosternal process 0.35× procoxal width. Ventral surface of meso- and metathorax with coarse, abundant, deep punctures, with minute, whitish seta; ventral surface of mesothorax and sides of metathorax with minute, sparse, yellowish setae between punctures; central area of metaventrite glabrous between punctures, except center of apex with short, thick, sparse, white and yellow setae. Scutellum glabrous on sides of anterior 3/4, with short, mostly yellow setae on center of anterior 3/4, and minute, moderately abundant yellow setae on posterior quarter. Elytra. Slightly arched near middle (fig. 3F); abundantly, very coarsely, and deeply punctate (fig. 3I); with oblique, irregular, yellowish-white pubescent band about middle, starting near epipleural margin, not reaching suture, and entire posterior fifth, both with minute yellow setae interspersed; anterior half with sparse, thick, short, and minute yellow setae between punctures, more abundant on circumscutellar region; remaining surface with sparse brown pubescence between punctures; sutural region with brown pubescence and short yellow setae interspersed on anterior 3/4, and sparse yellow setae on posterior quarter. Legs. Femora transversely rugose; with minute, thick, yellow and white setae not obscuring integument, and longer, thick, yellow and white setae interspersed laterally, more abundant near apex. Protibiae with minute, thick, yellow and white setae not obscuring integument dorsally and laterally, and longer, thick, yellow and white interspersed laterally, more abundant near apex; ventral surface with moderately short yellowish-white setae on basal half, and bristly, abundant brown, short, decumbent setae on posterior half. Basal 3/4 of mesotibiae with minute, thick, yellow and white setae not obscuring integument dorsally and laterally; outer side of dorsal surface with short, erect fringe of yellow setae, and remaining surface with short, sparse, decumbent yellow setae; sides of posterior quarter with short, decumbent, thick, abundant, yellow and white setae; ventral surface with abundant, thick, decumbent setae, whitish basally, gradually yellower toward apex. Metatibiae with minute, thick, yellow and white setae not obscuring integument dorsally and laterally; ventral surface with short, bristly yellowish-white setae; apex with fringe of thick yellow setae.

ABDOMEN: Ventrites coarsely punctate, punctures slightly finer, sparser from ventrite 1 to 5, except almost smooth on posterior region; with minute, sparse, yellow and white setae, and a few short, decumbent, thick, white and yellow setae interspersed, except apex of ventrites 1 to 4 with fringe of short, thick, decumbent yellow setae.

DIMENSIONS (mm): Total length, 6.30; prothoracic length, 1.90; anterior prothoracic width, 1.35; posterior prothoracic width, 1.45; maximum prothoracic width, 1.65; humeral width, 2.00; elytral length, 3.95.

TYPE MATERIAL: Holotype male from GUATEMALA, Izabal: Morales, Finca la Firmeza, Sierra de Caral , FUNDAECO, 600 m, 15.407148, -88.696255, 27-28.V.2019, Skillman, Wappes, and Monzón leg. ( FSCA, formerly FWSC).

ETYMOLOGY: The new species is dedicated to Frederick W. Skillman, Jr. (FWSC).

REMARKS: Morrisia skillmani , sp. nov., differs from M. pulchra Santos-Silva et al., 2019 , and M. squamosa ( Chemsak and Noguera, 1993) by the lower eye lobes with 10 rows of ommatidia (fig. 3C). In M. pulchra the lower eye lobes have five rows of ommatidia (fig. 3B), and M. squamosa seven (fig. 3A). Furthermore, the elytra (fig. 3I) and pronotum are more coarsely punctate than in M. pulchra and M. squamosa (fig. 3G–H). This is the first record of the genus in Guatemala (fig. 2).

Figures

FIGURE 1. A–D. Morrisia skillmani, sp. nov., holotype male: A. Dorsal habitus; B. Ventral habitus; C. Lateral habitus; D. Head frontal view. E–H. Adetaptera jejetama, sp. nov., holotype male: E. Head frontal view; F. Dorsal habitus; G. Ventral habitus; H. Lateral habitus.

FIGURE 3. A–C. Eyes: A. Morrisia squamosa (Chemsak and Noguera, 1993), male; B. M. pulchra Santos-Silva et al., 2019, holotype female; C. M. skillmani, holotype male. D–F. Elytral curvature: D. M. squamosa, male; E. M. pulchra, holotype female; F. M. skillmani, holotype male. G–I. Elytral punctures on posterior half: G. M. squamosa, male; H. M. pulchra, holotype female; I. M. skillmani, holotype male.