Carcinops yaqui Reese and Swanson 2017, new species
Creators: name: Reese, Ellen M.
name: Swanson, Alexander P.
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Histeridae
Carcinops
Carcinops yaqui

description: <i>Carcinops yaqui</i> Reese and Swanson, new species (Figs. 2D, 9I, 10F, 19) <b>Type Series. HOLOTYPE.</b> Male. “ MEXICO: Sonora, Rancho San/ Pablo nr. Alamos, 27.07153°N / 108.71231°W, 530m, 1.VI.2007 / ex. necrotic <i>Pilosocereus alensis</i> / A. Swanson, APS143” (UNAM; DNA voucher: APS143). <b>PARATYPES.</b> 5 specimens. Same data as holotype (APS, 1; CASC, 1; FMNH, 1); MEXICO: Sonora, Arroyo Santa Barbara nr. Alamos, 27.09443°N 108.71266°W, 900m, 30.V. 2007, ex. necrotic <i>Stenocereus montanus</i>, A. Swanson (CASC, 1; FMNH, 1; DNA voucher: APS 125); MEXICO: Puebla. near Las Bocas, November 2014, ex. necrotic <i>Stenocereus thurberi</i>, T. A. Markow (FMNH, 2; CASC, 1; LSAM, 1). <b>Diagnosis.</b> This species is recognized by the following combination of characters. <b>Body:</b> Ground punctation very fine and sparse. <b>Head:</b> Frontal stria terminating at clypeolabral suture (Fig. 3B); marginal epistomal stria absent. <b>Pronotum:</b> Marginal stria moderately divergent from anterior edge along midline (Fig. 4A). <b>Elytra:</b> Dorsal stria 5 and sutural stria shorter than dorsal striae 1–4, terminating in basal third of elytra (Fig. 8); subhumeral striae absent or reduced to rows of very faint punctures. <b>First abdominal ventrite:</b> Lateral disc bistriate (Fig. 2D). <b>Aedeagus:</b> Parameres straight, slightly spatulate, but tips terminating in acute point (Fig. 9I). <b>Description.</b> L: 2.17 mm; W: 1.60 mm; E/Pn L: 1.47; E/Pn W: 1.11; Pn W/L: 1.64; E L/W: 0.81; Sterna: 0.68, 0.27, 0.66 mm. Form oval, moderately depressed; color black to rufous, shiny. Frons slightly convex, finely, densely punctate; frontal stria interrupted anteromedially, extending anterad just beyond antennal insertion to clypeolabral suture, but strongly impressed throughout its length; marginal epistomal stria absent. Pronotum convex, widest at base and converging anteriorly, sides gently curving; anterior angles acute, projecting; marginal stria complete, strongly impressed, about twice as distant from anterior margin of pronotum behind head than along interior margin of anterior angles; pronotal disc finely, moderately densely punctate medially with a narrow, arching band of coarse punctures extending from posterior to anterior corners; posterior margin rounded, marked by a row of coarse round punctures; antescutellar puncture round, strongly impressed. Prosternal lobe coarsely moderately densely punctate, surface microstrigose posteriorly; prosternal keel moderately convex, surface microstrigose; carinal striae slightly inwardly arcuate, united posteriorly. Elytra finely moderately sparsely punctate, punctation more dense toward suture; coarse punctures confined to a narrow band along elytral apices, not extending basally beyond apical termini of dorsal and sutural striae; epipleuron coarsely punctate in apical half, marginal elytral stria arcuate, paralleling marginal epipleural stria before abruptly converging near apex, outer edge subcariniform; external and internal subhumeral striae generally absent, although external subhumeral may be represented by a row of several very faint punctures in some specimens; 1 st – 4 th dorsal striae complete, slightly inwardly arcuate, punctate at regular intervals; 5 th dorsal stria largely absent in basal third, though it may be extended basally by 2 or 3 faint punctures in some specimens; sutural striae similarly abbreviated such that a striation-free “window” is apparent across basomedial third of elytra. Mesosternum finely, densely punctate; anterior margin posteriorly arcuate; marginal stria complete, strongly impressed laterally, more weakly impressed along anterior margin, continuous with lateral metasternal stria; mesometasternal suture represented by a fine line; intercoxal disc of metasternum finely, densely punctate, entirely free from coarse punctation; lateral metasternal stria straight, strongly impressed, nearly reaching outer margin of metacoxal cavity; posterior mesocoxal stria outwardly divergent, about 3/4 length of internal lateral, terminating well before external lateral metacoxal margin; lateral disc coarsely moderately densely and evenly punctate. Propygidium coarsely, densely punctate with fine punctures interspersed; pygidium more finely punctate, a few coarse punctures scattered near base. Intercoxal disc of 1 st abdominal ventrite finely, moderately densely punctate anteriorly, punctation thinning posteriorly, surface almost entirely glabrous in posterior third; bistriate on each side medial to metacoxal cavities; lateral disc coarsely, sparsely punctate, bearing a marginal stria and single, short, strongly impressed medial stria. Outer margin of protibia bidentate in distal half, denticles rounded, deflexed, not projecting much beyond tibial margin; outer margin of mesotibia tridentate, with 2 denticles inserted near apex and 3 rd inserted just proximal to midpoint; outer margin of metatibia tridentate as in mesotibia, basal denticle strongly acute. Parameres of aedeagus widened in middle, slightly spatulate but elongate toward tips, about ½ length of basal piece (Fig. 9I). <b>Comparison with Related Species.</b> <i>Carcinops yaqui</i> is similar in appearance to <i>C. consors</i>, as both species possess two striae on the lateral discs of their first abdominal ventrite. The shape of the secondary stria, however, differs between the species. <i>Carcinops yaqui</i> has a relatively straight secondary stria (Fig. 2D), whereas <i>C. consors</i> has a secondary stria that diverges ventrally in its posterior fourth (Fig. 2C). <i>Carcinops yaqui</i> can also be distinguished from <i>C. consors</i> by its absence of subhumeral striae and the larger gap between its pronotal stria and the pronotal margin (Fig. 4A). <b>Geographic Distribution and Natural History.</b> <i>Carcinops yaqui</i> is known from Sonora and Oaxaca, Mexico. Sonoran specimens were collected from the necroses of <i>S. montanus</i>, <i>S. thurberi,</i> and <i>P. alensis.</i> Oaxacan specimens collected by A. Newton are recorded as having been found on “rotting cacti columnar/ <i>Opuntia</i>.” <i>Carcinops yaqui</i> specimens have been absent from collections taken in Baja California Sur, Arizona, and southern California, indicating a likely more southern range than other species of cactophilic <i>Carcinops</i> in the Sonoran Desert. <b>Additional Material Examined.</b> 3 specimens. <b>MEXICO: Sonora:</b> San Carlos, 27.9707°N 110.99825°W, sea level, 19.III.2007, ex. necrotic <i>Stenocereus thurberi</i>, A. Swanson (APS, 1; DNA voucher: APS127). <b>Oaxaca:</b> 5 mi. W Tequisistlán, 1100 ft, 23.VII-5.IX.1973, on rotting cacti, columnar/ <i>Opuntia</i>, A. Newton (FMNH, 2; DNA voucher: EMR562). <b>Derivation of Specific Epithet.</b> <i>Carcinops yaqui</i> is named for the Yaqui (“YAH-kee”) natives of Sonora, Mexico. The name is a noun in apposition.
description: Published as part of <i>Reese, Ellen M. &amp; Swanson, Alexander P., 2017, A Review of the CactophilicCarcinopsMarseul (Coleoptera: Histeridae) of the Sonoran Desert Region, with Descriptions of Six New Species, pp. 159-190 in The Coleopterists Bulletin 71 (1)</i> on pages 177-179, DOI: 10.1649/0010-065X-71.1.159, http://zenodo.org/record/5362679