Straneotia Mateu, 1961

Erwin, Terry L. & Aldebron, Charlotte, 2018, Neotropical Thoasia Liebke, 1939 and Straneotia Mateu, 1961 of the Cryptobatida group, subtribe Agrina: Taxonomic revisions with notes on their ways of life (Insecta, Coleoptera, Carabidae, Lebiini), ZooKeys 742, pp. 57-90 : 72-74

Straneotia Mateu, 1961 Slim arboreal carabid beetles Figs 4 , 5 , 6 , 7

Straneotia Mateu, 1961:165.

Type species.

Straneotia freyi Mateu, 1961, by original designation. Type locality. Brazil, Pará, Belém. The specimen is not in the Naturhistorisches Museum in Basel (G. Frey collection) as stated by Mateu, nor is it in the Muséum national d’Histoire naturelle, Paris (MHNP) where Mateu’s collection was deposited after his death.

Diagnosis.

(cf. Figs 4 - 6 ). Neck markedly broad, as wide as prothorax across apex of pronotum between lateral angles; eyes either somewhat flat, barely protruding beyond head outline, or moderately produced; frons flat, subtly rugose. Prothorax markedly narrow, barely wider than head; sides of pronotum narrowly reflexed throughout, cylindrical, hind angles subtly flared. Elytron at basal third very slightly transversely depressed, surface even, with slightly convex interval and striato-micropunctate interneurs. Flight wings clear. Basitarsus of mid and hind legs markedly elongate, coequal to length of tarsomeres 2-5. Male with two rows of adhesive setae on venter of tarsomeres 1-3; endophallus with flagellum; flagellum often extruded at apex; male with one pair of setae on sternum VI, females with two pairs.

Dispersal potential.

The wings are fully developed in adults of all known species, thus it is likely these beetles are moderate to strong flyers.

Geographic distribution.

A rare Neotropical genus known from Brazil, Ecuador, and French Guiana.

Ways of life.

Little is known about the species in this genus and that which is stated here is new. The newly collected specimens reported here were fogged from the canopy of rainforest trees.

Included species.

The species list below, as well as the arrangement of descriptions that follows is ordered alphabetically within two species groups.

amazonica species group

S. amazonica Mateu 1961, Brazil,

S. confundis Aldebron & Erwin, sp. n., Ecuador

Straneotia freyi species group

S. cylindroceps Erwin & Aldebron, sp. n., French Guiana

S. freyi Mateu, 1961, Brazil

S. moi Aldebron & Erwin, sp. n., Ecuador

Key to the species of Straneotia Mateu, 1961

1	Adults with head normal with hemispherical eyes and short angulate gena to a broad neck	2
1'	Adults with head elongate and eyes somewhat flattened	3
2(1)	Adults with pronotal base at least as broad as widest point	S. confundis , sp. n.
2'	Adults with pronotal base narrowing behind anterior pair of lateral setae	S. amazonica Mateu
3(1')	Head behind eye about 3 times length of eye	4
3'	Head behind eye about 1.2 times length of eye	S. cylindroceps , sp. n.
4(3)	Adults with pronotal base much wider than apex, pronotum not appearing tubular; ligula with setal pores separated by at least the width of their diameter	S. freyi Mateu
4'	Adults with pronotal base about subequal in width with that of apex, pronotum appearing tubular; ligula with setal pores close-spaced	S. moi , sp. n.

Figures

Figure 4. Digital Photo-illustrations. Habitus, dorsal aspect. A Straneotia cylindroceps Erwin & Aldebron, sp. n., female, ADP 100396 B Straneotia moi Aldebron & Erwin, sp. n., female, ADP 141236 C Straneotia confundis Aldebron & Erwin, sp. n., male, ADP 152452 D Straneotia amazonica Mateu, Holotype female. Scale bar: 1.00 mm (A-C); ABL = 5.5 mm (D).

Figure 5. Illustrations from the orginal descriptions by Mateu (1961). Habitus, dorsal aspect. A Straneotia freyi Mateu, female; Ligula and labial palpi, ventral aspect B Straneotia freyi Mateu, female C Stylomeres 1 and 2, dorsal aspect. Straneotia freyi Mateu, female D Head and pronotum, dorsal aspect. Straneotia amazonica Mateu, female.

Figure 6. Digital Photo-illustrations. A Female reproductive and defence systems, dorsal aspect: Straneotia cylindroceps Erwin & Aldebron, sp. n., ADP 100396 (see Fig. 2 references to female system; defense gland (gldr); cc accessory gland; ed efferent duct.). B Male aedeagus in repose, dorsal, ventral, left lateral aspects: Straneotia confundis Aldebron & Erwin, sp. n., ADP 152452. Legend, fl, flagellum. Scale bar: 0.50 mm.

Figure 7. Distribution map for known localities of Thoasia and Straneotia species.