Diastolinus victori Garrido, 2002

Hart, Charles J. & Ivie, Michael A., 2016, A Revision of the Genus Diastolinus Mulsant and Rey (Coleoptera: Tenebrionidae), The Coleopterists Bulletin 70 (3), pp. 485-540 : 485-540

Diastolinus victori Garrido, 2002

( Figs. 73–79 , 104 )

Diastolinus elongatus Marcuzzi 1977: 15 [junior primary homonym of Diastolinus elongatus Marcuzzi, 1976 ] (type locality: Puerto Rico, Isla Magueyes, Isla Cueba (also known as Isla Cueva), Caja de Muertos), Marcuzzi 2002: 399; Garrido 2002: 226 ( Isla Magueyes, Isla Cueba (mistakenly rendered as “ Culebra ”, a totally different island), Caja de Muerto [sic], Puerto Rico). Marcuzzi (2002) is somewhat confused, indicating that this description is really pertaining to his Cuban D. elongatus of 1976 (now Xerolinus ). However, we have examined specimens from both type series, and this is simply not correct, as they are distinctly different and do not even belong to the same genus.

Diastolinus victori Garrido 2002: 39 ( Isla Magueyes, Puerto Rico). Replacement name for Diastolinus elongatus Marcuzzi, 1977 . Garrido 2003: 27 ( Isla Magueyes), 2004a: 44; Peck 2005: 152 (in part, Puerto Rico, Mona records only).

Diastolinus marcuzzi Garrido 2003: 27 (lapsus calami).

Type Material. Holotype not examined ( MSNG) . PARATYPE: 700/ Puerto Rico; I. Magueyes; La Parguera / 10.9.1963. Nr. 700; P.W.Hummelinck / Diastolinus elongatus Marc. / on red bordered paper PARATYPUS 1977 Diastolinus elongatus Marcuzzi / WIBF 035145 ( HNHM) . PARATYPE: Caja de Muertos , P.R.; March 22–23, 1935; Coll: R.Bonilla / on red bordered paper PARATYPUS 1977 Diastolinus elongatus Marcuzzi / WIBF 035144 ( HNHM) . PARATYPE: 701A Puerto Rico, Parguera , Isla Cueva ; NW (limestone detritus), 11.IX.1963 / on red paper PARATYPUS / Brit.Mus.; 1973-207/ Diastolinus elongatus det G. Marcuzzi 1972/ WIBF 035137 ( BMNH) .

Other Material Examined. See Appendix 1.

Diagnosis. This species can be distinguished from most other Puerto Rican species by the large, elongate body. It is similar in overall appearance to D. desecheo , but can be distinguished by the combination of deeper elytral punctation, punctation on abdominal ventrites 2 and 3 larger and deeper, and male genitalia different in form.

Redescription. Male. Length 9.3–10.2 mm, width 3.8–4.2 mm. Body ( Fig. 73 ) black, except last 3 antennomeres testaceous; upper surface dull; elongate; widest across pronotum; moderately convex; scattered, yellow setae typically short.

Head ( Fig. 75 ) widely transverse, somewhat flattened; punctures subequal in diameter to ommatidium, covering dorsal surface, evenly spaced, separated by more than 1X puncture diameter posteriorly, spaced more closely anteriorly; setae 2X longer than puncture diameter, at least laterally. Labrum densely punctate, punctures equal in size to punctures on head, closely spaced. Antenna weakly clavate. Dorsal portion of eye perfectly rounded; ventral portion of eye ovate. Gular horns long, robust, and very prominent ( Fig. 76 ).

Pronotum ( Fig. 75 ) widened posteriorly; apical margin evenly, broadly emarginate; apical corners rounded, lateral margin widened from apex in anterior 1/2, then sides nearly parallel to base; basal width equal to width across humeri; basal margin bisinuate; dorsal surface broadly, evenly convex; all margins narrowly beaded, except obsolete at middle of anterior margin; punctate, puncture diameter equal to punctures on head, spaced 2-3X punctures diameter on pronotal disc; setae sometimes abraded on disc, visible laterally, 1–2X puncture diameter in length. Hypomeron feebly rugulose, punctate shallowly. Prosternal process tongue-like, punctate, with yellowish, semi-erect setae.

Scutellum ( Fig. 73 ) triangular, about 2X wider than long. Elytra ( Fig. 73 ) constricted in anterior 1/3. Elytron gradually broadening from base to widest point opposite abdominal ventrite 1, then evenly arcuate to apices; striae impressed; strial punctures deep and not confluent; intervals broadly convex, punctation minute anteriorly, fading posteriorly. Stria 7 ending in lateral stria posterior to humeral angle.

Mesoventrite somewhat rugulose.Metaventrite very short, punctate on anterior border behind mesocoxae.

Leg surfaces setose and finely punctate. Femora expanded. Protibia narrow basally, then gradually widened; posteroventral surface with stout spines in apical 1/3; apex obliquely truncate, ringed by stout spines. Pro- and mesotarsi with tarsomeres 1–3 expanded, ventrally with golden, densely setose pads, tarsomere 2 widest, more than 2X width of tarsomere 4. Metatarsus narrow, about 3/4 as long as metatibia, without setose pads; 1 st tarsomere 2.5X length of 2 nd.

Abdominal ventrites ( Fig. 77 ) finely punctate, white or yellow setae covering surface; ventrites 1–3 slightly concave medially, concavity not extending onto intercoxal process; anterior border of ventrite 1, just behind hind coxae, with row of heavy punctures extending onto intercoxal process, longitudinally rugulose areas posterior of punctures; ventrites 2–3 with row of heavy punctures on anterior edge, longitudinally rugulose areas posterior of punctures; ventrite 5 concave medially, posterior margin evenly rounded. Aedeagus ( Figs. 78, 79 ) with basal piece and parameres strongly arched, about equal to 2/3 elytral length; parameres narrowing evenly apically, then expanding to widest point, then converging towards apex, broadly rounded just before apex; parameres with slightly sinuate lateral margin, with upturned tips in lateral view.

Female. Length 9.5–10.6 mm long, width 3.9– 4.4 mm. Similar to male except pro- and mesotarsi not expanded. Abdominal ventrites 1–3 slightly convex medially; ventrite 5 slightly convex.

Biology. Specimens have been taken beating thorn scrub and from a fallen branch of gumbo limbo [ Bursera simaruba (L.) Sargent, Burseraceae ].

Distribution. Mona, Puerto Rico, Isla Magueyes (PR), Isla Cueva (PR), Caja de Muertos (PR) ( Fig. 104 ).

Diastolinus victori Garrido

Puerto Rico: Guanica; For.Res. 26SEPT1987; M.A.Ivie colr. 33m; beating, thornsrub (4 WIBF) . Puerto Rico: 1 mi S. Puente Las Vegas; N. of Yavco , 25APR1959, M.W.Sanderson (1 WIBF) . Puerto Rico: Guanica Native Forest ; April 1999; M.A.Garcia,GBN4 (1 WIBF) . Puerto Rico: Guanica Forest, Ballena trail, beating; Specimen ID: 4248; Gino Nearns , 26JULY2004 (1 FSCA) . Puerto Rico: Reserva Forestal ; Guanica 6mi SE Guanica; XII-24- 1986; J.Doyen & J.Santiago (1 EMEC, 5 WIBF) . Puerto Rico: Guanica National Forest , near coast; 10November1990; Coll. H.Hanake / From fallen rotten; branch of; Gumbo-Limbo (8 NMNH) . Puerto Rico: Punta Melones, El Combate ; 17°58′N, 67°13′W; 01JULY2008 / W. E. Steiner; J. M. Swearingen; O. H. Garrido; A. R. Perez-Asso; collectors (15 NMNH) . Puerto Rico: Beach east of Punta Ventana ; 17°57′N, 66°49′W; 29JUNE2008 / W. E. Steiner; J. M. Swearingen; O. H. Garrido; A. R. Perez-Asso; collectors (6 NMNH) . Puerto Rico: Guanica; 1.12.1915 (1 AMNH) . Guanica St. For. ; P.R. 11-I-68; F.Fisk collr. (8 OSUC) .

Figures

Figs. 73–79. Diastolinus victori. 73) Paratype, dorsal habitus; 74) Paratype, labels; 75) Pronotum; 76) Gular horn; 77) Abdominal ventrites; 78) Aedeagus, dorsal view; 79) Aedeagus, lateral view.

Fig. 104. Map of the distributions of the “sellio” species-group of Diastolinus species on Puerto Rico and Virgin Islands. Symbols on Puerto Rico represent collecting localities, and symbols on the Virgin Islands represent island distributions, not all collection events.