Calleida migratoria Casale, 2002

Desender, Konjev, Casale, Achille, Baert, Leon, Maelfait, Jean- Pierre & Verdyck, Peter, 2002, Calleida migratoria Casale, New Species (Coleoptera: Carabidae), A Newly Introduced Ground Beetle In The Galapagos Islands, Ecuador, The Coleopterists Bulletin 56 (1), pp. 71-78 : 74-77

Calleida migratoria Casale , new species

Diagnosis. With the character states of the cordicollis (decora Auct.) species group, but distinct from the closest Neotropical species by some peculiar features stressed below (see key).

Type Material. (Note: rather unusually, a female specimen was selected as holotype, being the only specimen known so far from the source continental area of the new taxon.) Female, holotype: Peru, Piura, Olmos 1800 m, 26.V.1957, W. Markl (M.N.H.N., Paris). Paratypes: 2 males / 1 females, Galápagos, Isabela island (Caleta Iguana, Cerro Azul: 27 March 1998: one male in Casale Coll., University of Sassari ; others in Entomology Coll. RBINSc, Brussels); 2 males / 2 females (same site: 28 March 1998) ; 1 male, Galápagos, Rabida island (near lagoon: 13 March 1998) ; 2 ind., Galápagos, Santiago island (near Playa Espumilla: 14 March 1998) ; 1 male / 1 female, Galápagos, Santa Cruz island ( CDRS: 18 March 2000) ; 1 ind., Galápagos, Santa Cruz island (Bahia Tortuga: 3 April 2000) ; 1 male, Galápagos, Pinta island ( Bahia Ibettson : 31 March 2000) (all in Entomology Coll. RBINSc, Brussels) .

Etymology. The specific epithet stresses the high vagility of the new species and its ability to colonize new areas.

Description. General features as in Figure 1 . Medium sized (mm 6.0–7.0). Head black, or dark metallic blue green, contrasting with the pale pronotum; antennomeres 1–3, and base of 4, yellow reddish; following antennomeres dark piceous. Prothorax rufous. Elytra uniformly metallic blue or green. Scutellum rufous; meso­and metasternum dark reddish, infuscated at lateral sides; metepisterna brown; abdominal sterna black, with distinct metallic sheen. Legs yellow reddish, with the apical third of femora, base and apex of tibiae, and tarsi dark piceous to blackish. Head and pronotum shiny, with highly effaced microsculpture; elytra sericeous, with evident reticulate sculpture.

Head wide, with evident neck constriction; genae swollen, not contiguous with the posterior margin of eyes; eyes very large and prominent; two supraorbital setae on each side. Pronotum cordate, slightly wider than long (ratio PL/PW:0.9); lateral sides sinuate and constricted to the base. Lateral reflection moderate. Disc sub­convex, with dense transversal wrinkles. Anterior angles vanished; basal angles rounded. One paramedial seta on each side present; basolateral seta absent. Elytra rather short (ratio LE/WE: 1.6), widened at the apical fourth; striae moderately impressed, shallowly punctate; intervals sub­convex. Apex beaded. Interval 3 with two discal and one apical setiferous pores; umbilicate series of 12–13 pores along stria 8, widely interrupted in the middle. Legs slender. Metatarsomeres 1–3 grooved dorsally; metatarsomere 4 slightly asymmetrical, with the inner lobe shorter and narrower than the outer. Abdominal sternum VII with two setae on each side in males, three to four setae in females. Aedeagus as in Figure 3. Inner sac with long, basally twisted flagellum. Ovipositor as in Figure 4. Spermatheca long, duct­like; spermathecal gland with sub­basal insertion.

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76 THE COLEOPTERISTS BULLETIN 56(1), 2002

Taxonomic and Biogeographical Notes. The agreement of undescribed Calleida specimens, recently found in Galápagos Islands, with a single female specimen collected many years ago in Western Peru, and preserved in the Paris Museum of Natural History, is highly important from the biogeographical point of view. It confirms the importance of museological collections for any present and future research on the diversity of life in little known areas. In fact, the Galápagos specimens had preliminarily been attributed to Calleida cordicollis Putzeys, 1845 (5 decora Fabricius, 1801, nec Panzer, 1800), abundant and widely distributed in the southern part of the U.S.A. and in Central America, and very similar in shape and color to C. migratoria Casale , n. sp. The presently ascertained geographical position of the continental source area, relatively close and facing the islands, supports the hypothesis of a passive, mere introduction to the islands by anthropogenic means, because most cargo ships from the mainland originate from that area.

Provisional Identification Key. The following provisional key enables the identification of the new taxon from the closest species, all characterised by dark head, contrasting with the pale pronotum, basolateral seta of pronotum absent, elytra uniformly green or blue, abdominal sternum VII with two setae on each side in males, and inner sac of aedeagus with long, basally twisted flagellum.

1. Basal margin of pronotum blackish. Legs uniformly blackish, with bluish metallic sheen. Small size (5.0–6.0 mm). Range: Peru, Bolivia ----------------- ---------------------------------------------------------------------------------------------------- C. haematodera Chaudoir, 1872

19. Pronotum uniformly rufous. Legs yellow reddish in part. Larger size (6.0– 7.5 mm) -------------------------------------------------------------------------------------------------------------------------- 2

2. Metasternum and metepisterna metallic black, concolorous with abdominal sterna -------------------------------------------------------------------------------------------------------------------------------- 3

29. Metasternum yellow reddish or dark reddish, contrasting with metallic black abdominal sterna --------------------------------------------------------------------------------------------- 4

3. Body slender; elytra dark green or blue green, shiny, long and narrow (LE/WE: 1.8), with post­humeral sinuation distinct and striae impressed. Range: Brazil, Atlantic coast ---------------------------- C. nigriceps Chaudoir, 1844

39. Body stout; elytra green, rather dull, shorter and wider (LE/WE: 1.7), with post­humeral sinuation vanished and striae very shallow. Range: Bolivia -------------------------------------------------------------------------------------- C. levistriata Chaudoir, 1872

4. Head and elytra concolorous olive green, the latter highly sericeous; tarsomeres reddish brown, darkened at apex. Pronotum markedly cordate, with lateral sides strongly constricted basally. Aedeagus: Figure 6. Range: High Amazon basin ----------------------------------------- C. schistoptera Chaudoir, 1872

49. Head dark metallic blue green to black; elytra green or blue violet, mod­

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5. Antennomeres 4–11 dark reddish to castaneous, less contrasting with the pale antennomeres 1–4; profemora blackish at apex only; metasternum and metepisterna uniformly pale rufous, highly contrasting with the black abdominal sterna. Aedeagus: Figure 5. Range: Southern part of U.S.A. and Central America -------------------------------------------- C. cordicollis Putzeys, 1845

59. Antennomeres 4–11 piceous, more contrasting with the pale antennomeres 1–4; profemora blackish in the apical half or third; metasternum at sides, and metepisterna, dark reddish to brown, moderately contrasting with the black abdominal sterna. Aedeagus: Figure 3. Range: Peru, Pacific coast; Ecuador: Galápagos islands ------------------------------- C. migratoria Casale , n. sp.

Figures

Fig. 1. Habitus of Calleida migratoria (total length about 7 mm).