Parabauba veracelensis James, Bartz & Brown, 2023

James, Samuel W., Bartz, Marie L. C. & Brown, George G., 2023, New Ocnerodrilidae genera, species and records from Brazil (Annelida: Crassiclitellata), Zootaxa 5255 (1), pp. 235-269 : 260-262

Parabauba veracelensis James, Bartz & Brown , sp. nov. ( Fig. 15 a-d)

Holotype. BRBADNA0340, late juvenile, Estaç „o Veracel Private Reserve ( RPPN Estaç„o Veracel), Porto Seguro, Bahia state, Brazil, S16.38724 ˚ W39.16957 ˚, 90 m asl., 30 cm deep in mineral soil of primary forest; 14 November 2014, M.L.C. Bartz, H. Nadolny, E. da Silva and G.G. Brown, colls.

Paratype s: BRBADNA336, 337, 338, 339, 341, five late juveniles, same data as holotype, one in each vial.

Etymology. The species is named for the type locality (RPPN Estaç„o Veracel), and the Veracel (Veracruz Celulose) company, the owner and manager of the reserve.

Description. Dimensions 40-55 mm by 2 mm at segment x, 2 mm at xxx, body cylindrical, segments 130-153; last 20 to 30 segments tapering and shortening. Setae closely paired; first setae in ii, setal formula AA:AB:BC:CD: DD = 5:1:10:1:32 at xxx. Prostomium epilobous open; segments lacking secondary annulations. Unpigmented, no dorsal pores, spermathecal pores intersegmental 7/8/ 9 in AB, surrounded by oval lip. Ovipores not observed; male field acanthodriline, slightly depressed; prostatic pores equatorial in xvii, xix on transverse oval papillae; male pores in xviii in seminal grooves. Setae AB in xvii, xviii, xix not seen. Clitellum not developed; genital markings absent ( Fig. 15a, b ).

Septa 5/6-9/10 strongly muscular, 10/11/12/13 slightly muscular. Alimentary canal with long well-developed gizzard in v; esophagus valvular in xii, intestinal origin in xiii ( Fig. 15c, d ); no typhlosole. Calciferous glands ovate oriented vertically, paired in ix and x, no central lumen, parallel large tubules or lamellae converging near duct; glands of ix with blood vessel from anterior end to extra-esophageal vessel, and blood vessel from posterior end of gland to supra-esophageal vessel; glands of x with blood vessels through duct of gland. Gland attachment at dorsolateral face of esophagus. Holonephric, first nephridia in segment v, in intestinal segments small, confined to BC, tubular throughout.

Vascular system with ventral trunk, single dorsal trunk, lateral vessels in vii-ix, latero-esophageal hearts in x-xi. Supraesophageal vessel in ix-xi.

Ovaries, funnels free in xiii; paired adiverticulate spermathecae in viii, ix, duct muscular with ectal bulb at body wall, tapering entally towards ampulla; ampulla ovate ( Fig. 15c ).

Male sexual system holandric, testes and funnels free in x, xi; vas deferens superficial on body wall from 10/11 to xviii where it enters body wall; seminal vesicles acinous in xi, xii. Slender tubular prostates coiled under or alongside intestine within xiii-xx ( Fig. 15d ). Prostatic ducts long, muscular, of constant diameter.

Remarks. So far, the only described species in the genus, it is distinguished from all other Ocnerodrilidae by the diagnostic characters of the genus. Unlike the other Ocnerodrilidae examined for this publication, the calciferous glands contained abundant white powder, presumed to be calcium carbonate granules. DNA barcode data for this species was not obtained. A different, still undescribed species of Parabauba was found by Silva et al. (2023) at the Una Biological Reserve, around 120 km (in straight line) from the Veracel station.

Figures

FIGURE 15. Parabauba veracelensis sp. nov. A. Ventral view of male field (mf), spermathecal pore (sp); B. Detail of male field; C. Internal view with spermatheca (s); D. Internal view with prostates (pr), scale bars 2 mm.