Baianassa carminata (Brölemann) Hoffman, 2012

Hoffman, Richard L., 2012, New Genera For Two Poorly-Known Millipeds From Bahia (Polydesmida: Chelodesmidae), Papéis Avulsos de Zoologia 52 (8), pp. 103-110 : 103-110

Baianassa carminata (Brölemann) comb. nov.

Figures 8-15

Leptodesmus carminatus Brölemann, 1903, Ann. Soc. Ent. France, 71:670, text fig. 21, 22, pl. 7, figs. 19-21. Male holotype (Mus.Nat. Hist. Nat. Paris), from “ Santo Antonia da Barra, Sertão de Bahia ”, E. Gounelle leg.

Chondrodesmus carminatus : Attems, 1938, Das Tierreich, 69:85, fig. 98.

Material examined: The holotype.

Diagnosis: With the characters of the genus, further specific characters may be identified in gonopod structure when additional species are discovered.

Description (partly from Brölemann): Length of holotype 63 mm., width of 9 th segment, 10.4 mm. Body robust, the anteriormost segment slightly the widest, parallel-sided except for the last three segments.

Dorsum uniformly deep carmine, with a spot on each paranotum, a median spot on the caudal edge of the metaterga, antennae and legs yellow; ventral surfaces slightly paler red. Metaterga dorsally distinctly and densely coriaceous, from the 19 th segment with a vaguely defined sulcus, no transverse series of tubercles. Stricture finely costulate. Paranota large, set high on sides, mostly subquadrate, anterior corners broadly rounded; ozopores located on side of peritremata, which persist only as far as pore, not continued to posterior corner ( Fig. 8-10 ). Sterna broad, flat, not as wide as length of femora, without subcoxal spines. Legs robust, 9.5 mm at midbody, tibiae without apical ventral pads; ventral surfaces with dense setation. Femora of 2 nd -4 th pairs of legs incrassate, with small ventral basal lobe (?adenostyle) ( Fig. 11 ). Sternum of segment 5 with two paramdian pairs of slender, acuminate, mesially-directed processes ( Fig. 12 ).

Gonopods ( Figs. 13-15 ) relatively short and compact, without mesosternal sclerite; coxosternal apodeme slender and nearly straight in the coxal axis. Coxae not prolonged on the lateral side, but with a large, acute apophysis on the dorsal; a small field of setae on the dorsolateral surface; no paracannular setae. Telopodite set against coxa at nearly a right-angle; acropodite continues direction of prefemur. Telopodite dominated by the large, shield-like prefemoral process which encloses the short, simple acropodite. Efferent duct carried by the acropodite termination. No cingulum present on either component of the telopodite.

Comments: Although a number of tribal groups have been proposed in the Brazilian chelodesmid fauna in recent decades, none share the combination of characters that would accomodate Baianassa , which occupies a somewhat disjunct position. A disposition of this genus is probably contingent upon a much better knowledge of the (probably numerous) native chelodesmids of Bahia and adjacent states to the north.

The location of Santo Antonio da Barra is specified in the account of the preceding species.

Figures

FIGURES 8‑12: Baianassa carminata (Brölemann), peripheral structures. 8. Left paranotum of 5th segment. 9. Left paranotum of 10 th segment. 10. Left paranotum of 17th segment. 11. Sternal region of 4th segment and legs of 2nd and 3rd pairs, posterior aspect. 12. Sternal region of 5th segment, anterior aspect, showing sternal processes.

FIGURES 13‑15: Baianassa carminata (Brölemann), male genitalia. 13. Left gonopod, ventral (in situ) aspect. 14. The same gonopod, lateral aspect. 15. The same gonopod, mesal aspect.