Eurhoptus occidentalis Anderson & Caterino

Anderson, Robert S. & Caterino, Michael S., 2018, A revision of the genus Eurhoptus LeConte, 1876 (Curculionidae, Cryptorhynchinae) of America north of Mexico, ZooKeys 787, pp. 37-80 : 66-69

Eurhoptus occidentalis Anderson & Caterino sp. n. Figures 5, 11

Description.

Body length (exclusive of head and rostrum) 1.8-2.7 mm, cuticle largely bare, variously covered with dense, short, fine recurved seta-like scales only. Pronotum with lateral margins rounded, margins constricted at about apical one-third such that apical one-third is tubulate, greatest width at about basal one-third, not medially carinate. Elytra strongly rounded dorsally and laterally, striae distinct, punctures moderate in size and depth; all elytral intervals evenly elevated, slightly rounded, each with single row of dense, fine recurved seta-like scales. Metaventrite medially slightly impressed behind mesoventral cup. Abdomen with ventrite 1 with pair of obliquely arranged transversely elongate pits which are separate medially, and with second pair of small rounded pits along posterior margin of ventrite; ventrite 5 with small pair of central, rounded impressions. Legs with femora and tibiae at most fringed with a few erect scales especially along outer margin of tibiae, hind tibiae subequal in width throughout most of length. Aedeagus about as long as one-half length of aedeagal apodemes, in lateral view slightly ventrally curved, in dorsal view with margins gradually convergent from base to apex, apex not produced, broadly rounded. Internal sac with large distinct apical sclerite complex, with median pyriform sclerite, bordered laterally by pair of apically convergent longitudinal bars these each bordered posteriorly by well-defined transverse pyriform sclerite, longitudinal bars not well-defined.

Distribution

(Map 2). This species is distributed in west Texas in the Guadalupe and Chisos Mountains. Despite extensive sampling, no specimens are known from New Mexico or Arizona.

Etymology.

We name this species " occidentalis " (L., an adjective or participle in the nominative singular, westerly, connected or coming from the west) after its western Texas distribution.

Specimens examined.

Holotype male (CMNC), labelled "USA: TEX: Brewster Co. / 29.2611°N, 103.2539°W / BigBend NP, Pine Cyn / 1615 m, ix.6.1988, hardwd / Berlese, R.S. Anderson", dissected. Paratypes (261): TEXAS: Brewster Co.: Big Bend National Park, Pine Canyon, 1615 m (29.2611, -103.2539), R.S. Anderson, 6 Sep 1988, hardwood litter berlese (26, CMNC; 3, CNCI); Brewster Co.: Big Bend National Park, Oak Canyon (29.28, -103.34), R.S. Anderson, 8 Sep 1988, hardwood berlese (1, CUAC); Brewster Co.: Big Bend National Park, Pine Canyon (29.27, -103.24), R.S. Anderson, 6 Sep 1988, hardwood berlese (1, CUAC); Brewster Co.: Big Bend National Park, Window Trail (29.27, -103.32), W. Suter, 29 May 1983, moldy log (1, CUAC); Brewster Co.: Big Bend National Park, Boot Canyon & Emory Peak Trail, 2070 m (29.245, -103.304), R.S. Anderson, 7 Sep 1988, berlese hardwood litter (1, CMNC); Brewster Co.: Big Bend National Park, Boot Spring, 6300' (29.24, -103.298), S.B. Peck, 7 Aug 1975, oak-maple litter (1, CMNC); Brewster Co.: Big Bend National Park, Cattail Falls, 1310 m (29.273, -103.336), R.S. Anderson, 6 Sep 1988, berlese hardwood litter (14, CMNC; 4, TAMU); Brewster Co.: Big Bend National Park, Cattail Falls (29.273, -103.3356), R.S. Anderson, hardwood berlese (1, CUAC); Brewster Co.: Big Bend National Park, Cattail Falls, (29.273, -103.336), C.E. Carlton, 4 Aug 2000, berlese (10, LSAM); Brewster Co.: Big Bend National Park, below Cattail Falls, (29.275, -103.317), W. Suter, 30 Mar 1983, oak treehole (16, CWOB); Brewster Co.: Big Bend National Park, Cattail Falls, 4300' (29.273, -103.336), S.B. Peck, 5 Aug 1975, forest litter (10, CMNC; 7, CWOB); Brewster Co.: Big Bend National Park, Green Gulch, 1700m (29.278, -103.284), W. Suter, 1 Jun 1983, litter oak-juniper (1, CMNC); Brewster Co.: Big Bend National Park, Green Gulch, nr. Panther Pass, 1700 m (29.278, -103.284), W. Suter, 1 Jun 1983, litter oak-juniper (1, CWOB); Brewster Co.: Big Bend National Park, 7.4 km. up from Basin (29.27, -103.30), C.E. Carlton, 31 Jul 2000, berlese (6, LSAM); Brewster Co.: Big Bend National Park, Lost Mine Trail, (29.27, -103.28), W. Suter, 6 Jun 1983, litter (1, CWOB); Brewster Co.: Big Bend National Park, Oak Canyon, 1463 m (29.281, -103.336), R.S. Anderson, 8 Sep 1988, berlese hardwood litter (11, CMNC); Brewster Co.: Big Bend National Park, Oak Spring, (29.28, -103.33), W. Suter, 8 Jun 1983, litter under oaks (3, CWOB); Brewster Co.: Big Bend National Park, Pine Canyon, 1615 m (29.2611, -103.2539), R.S. Anderson, 6 Sep 1988, hardwood litter berlese (6, BMNH; 18, CMNC; 6, USNM); Brewster Co.: Big Bend National Park, Pine Canyon, 1830 m (29.267, -103.253), S.B. Peck, 9 Aug 1975, oak maple litter (4, CMNC); Brewster Co.: Big Bend National Park, The Window, 4500' (29.275, -103.319), S.B. Peck, 2 Aug 1975, (9, CMNC); Brewster Co.: Big Bend National Park, Window Outlet, Rd to Cattail Falls, 1200 m (29.273, -103.34), R.S. Anderson, 6 Sep 1988, berlese hardwood litter (5, CMNC); Brewster Co.: Big Bend National Park, Window Trail, 1370 m (29.275, -103.317), S.B. Peck, 2 Aug 1975, madrone-oak litter (6, ASUIC; 10, CMNC; 11, CWOB; 6, TMMC); Brewster Co.: Big Bend National Park, Window Trail, 1370 m (29.275, -103.317), W. Suter, 29 May 1983 (4, CMNC; 6, CWOB); Brewster Co.: Big Bend National Park, Window Trail, 1370 m (29.275, -103.317), W. Suter, 27 August 1983 (14, CWOB); Brewster Co.: Big Bend National Park, Basin Area, (29.27, -103.30), E.G. Riley, 20-21 July 2002, berlese oak ravine litter (10, EGRC; 23, TAMU);); Brewster Co.: Big Bend National Park, Emory Peak Trail (29.26, -103.30), C.E. Carlton, 4 Aug 2000, berlese (2, LSAM); Culberson Co.: Guadalupe Mountains National Park, McKittrick Canyon (31.98, -104.78), P.W. Kovarik, 4 Sep 1986, leaf litter (2, CMNC).