Published June 5, 2026 | Version v1

Leucon longirhynchus Muhlenhardt-Siegel 2005

  • 1. Leibniz Institute for the Analysis of Biodiversity Change, Centre for Taxonomy and Morphology, Museum of Nature Hamburg, Zoology, Hamburg, Germany
  • 2. Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Biodiversidad y Biología Experimental (DBBE), Buenos Aires, Argentina & Universidad de Buenos Aires – CONICET, Instituto de Biodiversidad y Biología Experimental y Aplicada (IBBEA), Buenos Aires, Argentina
  • 3. Leibniz Institute for the Analysis of Biodiversity Change, Centre for Taxonomy and Morphology, Museum of Nature Hamburg, Zoology, Hamburg, Germany & Leibniz Institute for the Analysis of Biodiversity Change, Centre for Biodiversity Knowledge Science, Museum of Nature Hamburg, Zoology, Hamburg, Germany

Description

Leucon longirhynchus Mühlenhardt-Siegel, 2005

Holotype.

South Atlantic Ocean • non-ovig. ♀; Angola Basin, DIVA I exped., FS Meteor stat. M 48/1-338-1; 18°19.4'S, 04°39.7'E to 18°20.8'S, 04°38.6'E [- 18.30078, 4.66545; - 18.34863, 4.64443]; 5397–5398 [5439–5443] m depth; 22 July 2000; Angelika Brandt & J. Wolfgang Wägele leg.; epibenthic sledge; ZMH -K-040663.

Paratypes.

* • juv. ♀; same data as holotype; ZMH -K-040664. * • 1 juv. + ♂ + subA. ♀ + non-ovig. ♀; Angola Basin, DIVA I exped., FS Meteor stat. M 48/1-350-1, 16°14.3'S, 05°26.8'E to 16°14.9'S, 05°26.7'E (- 16.22215, 5.44728; - 16.247, 5.445 03); 5389 (5433–5434) m depth; 29 July 2000; Angelika Brandt & J. Wolfgang Wägele leg.; epibenthic sledge; male dissected and one female used for SEM; ZMH -K-067059. * • ♂ + juv. ♀ + subA. ♀; Angola Basin, DIVA I exped., FS Meteor stat. M 48/1-340-1, 18°18.3'S, 04°41.3'E to 18°19.4'S, 04°41.9'E (- 18.28822, 4.68683; - 18.32237, 4.69722); 5395 (5419–5443) m depth; 22 July 2000; Angelika Brandt & J. Wolfgang Wägele leg.; epibenthic sledge; ZMH -K-067060.

Remarks.

Mühlenhardt-Siegel (2005 c) did not explicitly designate a particular lot as a paratype in the publication; she only includes the sentence “ description of appendages based on paratype male ”. This specimen corresponds to a dissected male from stat. 350, which together with three specimens (same station) and animals from stat. 340 is listed as “ material ” in the publication; a single collection number was assigned to all of them (ZMH -K-040664). Reviewing the collection holdings, we found an additional juvenile female from stat. 338 (same data as holotype) marked as paratype in the catalogue book, index cards, and original labels. This specimen is not listed by Mühlenhardt-Siegel (2005 c) but represents an additional paratype. Based on this, we include the paratype designation to all material, specimens from stat. 338 retain the original collection number assigned by Mühlenhardt-Siegel (2005 c), whereas material from stat. 350 and stat. 340 were assigned to new collection numbers (see below). Two additional lots deposited in SMF might represent additional paratypes (SMF 30273, SMF 30274).

Diagnosis.

Carapace, anteroventral margin little serrate; pseudorostrum, long and acute; antennal notch shallow, not distinct. Pereopod 2, basis longer than rest of appendage (after Mühlenhardt-Siegel 2005 c).

Distribution.

Southeast Atlantic, Angola Basin, 5389–5398 m depth.

Notes

Published as part of Mercado-Salas, Nancy F., Mühlenhardt-Siegel, Ute, Pereira, Emanuel & Garilao, Cristina, 2026, An annotated type catalogue and a fully digitised Crustacea collection of the Museum of Nature Hamburg, Zoology. Part I: Crustacea, Malacostraca, Peracarida, Cumacea, pp. 137-193 in Evolutionary Systematics 10 (1) on pages 137-193, DOI: 10.3897/evolsyst.10.187593

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Additional details

Biodiversity

References

  • Mühlenhardt-Siegel U (2005 c) Cumacea species (Crustacea: Peracarida) from the deep-sea expedition DIVA-I with RV " Meteor " to the Angola Basin in July 2000. Family Leuconidae. Organisms, Diversity & Evolution 5: 131–149. https://doi.org/10.1016/j.ode.2004.10.009