University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Center for Systematic Entomology, Gainesville, Insecta Mundi Florida 1-29-2021 Recharacterization of Stenaspis Audinet-Serville, 1834 with a new species from Mexico (Coleoptera: Cerambycidae: Cerambycinae: Trachyderini) Bryan K. Eya California Environmental Protection Agency, [email protected] Follow this and additional works at: https://digitalcommons.unl.edu/insectamundi Part of the Ecology and Evolutionary Biology Commons, and the Entomology Commons Eya, Bryan K., "Recharacterization of Stenaspis Audinet-Serville, 1834 with a new species from Mexico (Coleoptera: Cerambycidae: Cerambycinae: Trachyderini)" (2021). Insecta Mundi. 1342. https://digitalcommons.unl.edu/insectamundi/1342 This Article is brought to you for free and open access by the Center for Systematic Entomology, Gainesville, Florida at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Insecta Mundi by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. A journal of world insect systematics INSECTA MUNDI 0851 Recharacterization of Stenaspis Audinet-Serville, 1834 Page Count: 36 with a new species from Mexico (Coleoptera: Cerambycidae: Cerambycinae: Trachyderini) Bryan K. Eya California Environmental Protection Agency Office of Environmental Health Hazard Assessment, Pesticide and Environmental Toxicology Branch 1001 I Street Sacramento, CA 95812 USA Date of issue: January 29, 2021 Center for Systematic Entomology, Inc., Gainesville, FL Eya BK. 2021. Recharacterization of Stenaspis Audinet-Serville, 1834 with a new species from Mexico (Coleop- tera: Cerambycidae: Cerambycinae: Trachyderini). Insecta Mundi 0851: 1–36. Published on January 29, 2021 by Center for Systematic Entomology, Inc. P.O. 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This is an open access article distributed under the terms of the Creative Commons, Attribution Non-Commer- cial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited. http://creativecommons.org/licenses/by-nc/3.0/ 0851: 1–36 INSECTA MUNDI 2021 Recharacterization of Stenaspis Audinet-Serville, 1834 with a new species from Mexico (Coleoptera: Cerambycidae: Cerambycinae: Trachyderini) Bryan K. Eya California Environmental Protection Agency Office of Environmental Health Hazard Assessment, Pesticide and Environmental Toxicology Branch 1001 I Street Sacramento, CA 95812 USA [email protected] Abstract. The genus Stenaspis Audinet-Serville, 1834 (Coleoptera: Cerambycidae: Cerambycinae: Trachy- derini) is recharacterized by providing additional morphological features to enhance the definition of this genus. Stenaspis plagiata Waterhouse, 1877 is transferred to Crioprosopus Audinet-Serville, 1834, new com- bination, and the latest key to species of Crioprosopus is modified. A key to the genera of Group III-Stenaspes with “abruptly separated anteocular space,” and a key to species of Stenaspis is provided. Color illustrations of the available species are included. Stenaspis lingafelteri Eya, new species, from Mexico is described. Key words. Identification key, America, taxonomy. ZooBank registration. urn:lsid:zoobank.org:pub:37900822-FF60-4386-BF30-9434678DD39B Introduction As currently defined, the genusStenaspis Audinet-Serville, 1834 contains six species (Stenaspis castaneipennis Dupont, 1838, S. plagiata Waterhouse, 1877, S. solitaria (Say, 1824), S. superba Aurivillius, 1908, S. validicornis Casey, 1912 and S. verticalis Audinet-Seville, 1834) distributed from Texas and Arizona (United States) to Bolivia. Based on comments made by Bates (1880: 76), the genus Stenaspis is “restricted to those species in which the prosternal process is produced at its upper edge and presents a vertical face to the mesosternum, according to the intention of the founder Audinet-Serville.” Linsley (1962: 91) in his “Key to the North American Genera of Purpuricenini” further characterized Stenapsis as a group of species that are large, robust and 20 mm or more in length with apices of mandibles acute or simple (Fig. 1–6), prosternum that is protuberant or ridged between coxae and vertical or concave behind and mesosternum that is not protuberant (Fig. 7–9), elytra with unarmed apices (Fig. 10–12), and legs of moderate length, with posterior femora falling short of apices of elytra. The palpi are short, and the last segments are not expanded, and the pronotum is angulate or tuberculate at the sides. The apices of mandibles of Stenaspis are acute in S. castaneipennis, S. superba and S. verticalis; however, S. solitaria has apices that are simple but blunt and rounded or narrowly truncate. According to LeConte and Horn (1883: 297) Stenaspis belongs to a group of trachyderine categorized as “Group III-Stenaspes”, which includes Crioprosopus Audinet-Serville, 1834, Tragidion Audinet-Serville, 1834, Purpuricenus Dejean, 1821 and Aethecerus Chevrolat, 1862a (or Aethecerinus Fall and Cockerell, 1907) with frons large, square, perpendicular, abruptly separated from the anteocular spaces, and Mannophorus LeConte, 1854, Entomosterna Chevrolat, 1862b, Amannus LeConte, 1858 and Batyle Thomson, 1864 with frons moderate, short, declivous, and not abruptly defined on each side of genae. Stenaspes along with “Group I-Megaderi” (or Megade- rus Dejean 1821) and “Group II-Trachyderes” have mandibles that are acute or simple at the apices. These three groups are separated from “Group IV-Tyloses” with emarginate-truncate mandibles, which were reviewed previ- ously along with the revision of the genus Deltaspis Audinet-Serville, 1834 (Eya 2019). Stenaspes is differentiated from Megaderi and Trachyderes by the posterior margins of pronotal discs that are not lobed and sometimes sinuate, while the latter groups have the posterior margin of the pronotal disc broadly and distinctly lobed. Most of the Stenaspis species were described in the 1800s to early 1900s and were defined by few character- istics, mainly the apex of the prosternal process being vertical behind, which was considered unique for this genus 2 · January 29, 2021 Eya 2a 1 2b 2 3 5a 5b 4 5 6 7a 7b 7 8 9a 9b 8a 8b 9 10 11 12 Figures 1–12. Characteristics of the head, sternum and elytra of Stenaspis. 1–3) S. veritcalis, male, Puebla, MEX. 4–6) S. verticalis, female, Jalisco, MEX. 7, 10) S. castaneipennis, male, Oaxaca, MEX. 8, 11) S. solitaria, male Co- chise Co., AZ, USA). 9, 12) S. verticalis, male, Nuevo Leon, MEX. 1–6) Characteristics of the head, i.e “frons large, square, perpendicular, abruptly separated from anteocular space,” 1, 4) Gena large, quadrate; mandibles well separated from lower eye lobe. 2: 2a; 5: 5a) Dorsal anterior margins of genae ridged. 2: 2b; 5: 5b) Frons perpen- dicular to vertex and recessed between “anteocular space” (i.e., recessed between the dorsal anterior margins of genae). 3, 6) Apex of mandibles acute, simple. 7–9: 7a, 8a, 9a) Prosternal intercoxal process with apex protuber- ant, ridged between coxae, abruptly declivous behind. 7–9: 7b, 8b, 9b) Mesosternum not protuberant, level with coxae.