Cyrtosoma dominicae Spiessberger and Ivie, 2018

Spiessberger, Erich L. & Ivie, Michael A., 2018, Revision of the West Indian Cyrtosoma Perty (Coleoptera: Tenebrionidae: Cnodalonini), with Descriptions of Three New Species, The Coleopterists Bulletin 72 (4), pp. 825-837 : 832

Cyrtosoma dominicae Spiessberger and Ivie , new species

( Figs. 4 , 10 ) Zoobank.org/ urn:lsid:zoobank.org:act:00030AFB-7F0E-4FB7-BD60-B23D0BFA8FE2

Cyrtosoma lherminieri ; Leng and Mutchler 1917: 214 (in part, Dominica record only); Blackwelder 1945: 538 (in part, Dominica record only); Marcuzzi 1984: 102 (in part, Dominica record only); Peck 2006: 190 (in part, Dominica record only), 2010: 48 (in part, Dominica record only), 2016: 164 (in part, Dominica record only); Peck et al. 2014: 86 (in part, Dominica record only).

Cyrtosoma lherminierii ; Soldati and Touroult 2014: 104 (in part, Dominica record only).

Type Material. HOLOTYPE: 1 6: WEST INDIES: DOMINICA; Springfield Estate, 31.V-16. VI.04,; N 15°20.841’ W 61°22.000’, 500m; ridgetop forest above Mt Joy, FIT; S. & J. Peck, 04-90 ( CMNC). PARATYPES (4 specimens): 1 ♀: same locality data as holotype ( WIBF). 161♀: Dominica; June-July; H.W. Foote; Yale Exp 1913/ Cyrtosoma ; lherminieri Chevr (NMNH) . 1 ♀: DOMINICA BWI; West Cabrits; 28.III.1956; J.F.G. Clarke ( NMNH).

Etymology. The name is a latinized noun in the genitive case based on the modern name of the island, treated as a noun in apposition.

Description. Length 10.2–11.5 mm, width 5.3–5.6 mm. Dark reddish brown, dorsal surface with very sparse, erect, golden setae, denser on pronotum, weakly shiny, weakly matte. Head transverse, shallowly punctate, slightly denser on clypeus; gena without punctures, genal groove long ( Fig. 10 ); antenna reddish brown, bearing golden setae on all antennomeres, denser on VII–XI; pronotum transverse, somewhat convex, margins beaded, lateral margins rounded, widest at middle, anterior margin slightly elevated and weakly sinuate medially, bead fading medially, anterior angles obtuse to rounded, basal marginal bead fading medially, basal angles obtuse, surface moderately weakly punctured, each puncture with a fine, golden seta, surface between punctures shagreened at higher magnification; hypomeron glabrous, impunctate, and shagreened; prosternum medially longitudinally raised, bearing pits with golden seta, margined between coxae and behind, prosternal process with a raised smooth lateral margin separated from medial disc by a deep groove, disc between these grooves not depressed, bearing fine, golden setae ( Fig. 10 ). Elytron with deep, fine striae with small punctures; 1 st and 2 nd striae converging anteriorly, usually not joined, interstriae convex and sparsely punctate, each puncture with an erect golden seta, surface shagreened. Mesoventrite with higher concentration of shallow, setose punctures in mesoventral cavity. Metaventrite nearly impunctate, punctures shallow and dispersed, with post-coxal, pit-like crenulations. Tibiae with sparse, erect, golden setae on dorsal surface, denser on apical half of ventral surface, becoming dense, golden brush at apex. Abdomen with post-coxal, pit-like crenulations, surface shiny, shallowly punctate, and microsetose.

Distribution. Dominica.

Remarks. Considering the extensive inventory work that has been conducted on Dominica (see Peck 2011), it is surprising more specimens of the species have not been found. It must be relatively rare or unusually cryptic.

Figures

Figs. 1–6. Cyrtosoma species, dorsal habitus. 1) C. lherminierii; 2) C. martiniquense; 3) C. grenadense; 4) C. dominicae; 5) C. luciae; 6) C. vincenti.

Figs. 7–12. Cyrtosoma species, head and prosternum, ventral view. 7) C. lherminierii; 8) C. martiniquense; 9) C. grenadense; 10) C. dominicae; 11) C. luciae; 12) C. vincenti.