Laeonereis acuta ( Treadwell, 1923 )

Conde-Vela, Víctor M., 2021, Revision of Laeonereis Hartman, 1945 (Annelida: Phyllodocida: Gymnonereidinae), with a review of shaft morphology in nereidids, Journal of Natural History 55 (7 - 8), pp. 381-455 : 400

Laeonereis acuta ( Treadwell, 1923)

( Figures 5 (a), 6; 8(a–l), 9(a–e), and 10(a–p))

Nereis ( Leptonereis) acuta Treadwell 1923: 3–5 , figs 1–5.

Laeonereis acuta Orensanz and Gianuca 1974: 9 . Santos and Lana 2001: 144–146, figs 26–32.

Type material

Southwestern Atlantic Ocean, Brazil. Paratypes of Nereis ( Leptonereis) acuta USNM 19030 (3), Santos, February 1914, Coll . H . Luederwaldt.

Additional material

Southwestern Atlantic Ocean, Brazil. ECOSUR-P3101 (3), Itaipu, Niteroi , 31 July 2012, Coll . C . Santos, P. Alves . ECOSUR-P3102 (5), Rio de Janeiro, January 2014, Coll . A . Melo.

Figures

Figure 5. Foregut, papillae and jaws in Laeonereis species. (a) non-type specimen of L. acuta (ECOSUR- P3102), ventral dissection; (b) non-type specimen of L. pandoensis (ECOSUR-P3103), dorsal dissection; (c) and (d) rounded papillae in area VIII from paratype of L. orensanzi comb. nov. (UANL 7840); (e) rodlike, verticillate papillae from syntype of L. culveri from area IV (USNM 541); (f) everted pharynx from paratype of L. longula sp. nov. (USNM 1490792), labels indicate papillae on the pharyngeal areas; (g) left jaw of the paratype of L. brunnea (USNM 43404), dorsal view; (h) left jaw of the syntype of L. culveri (USNM 541), dorsal view; (i) left jaw of the paratype of L. longula sp.nov. (USNM 1490792), dorsal view; (j) left jaw of L. orensanzi comb. nov. (UANL 7840), dorsal view; (k) left jaw of non-type of L. pandoensis (ECOSUR-P3103), dorsal view. Dark areas in (a) and (b) are due to remnants of Shirlastain staining; (f) is stained with methyl green. Scale bars: a, b = 0.5 mm; c–e, j = 25 µm; f–i, k = 0.1 mm. Abbreviations:Es, oesophagus; Jw, jaw; Pa, papilla; Ph, pharynx; Pp, palpophore; Ps, palpostyle.