Racovitzaibathynella beninensis Camacho & Mas-Peinado & Lagnika & Martin & Dorda & Rey 2024, sp. n.
Creators: name: Camacho, A. I.
name: Mas-Peinado, P.
name: Lagnika, M.
name: Martin, P.
name: Dorda, B. A.
name: Rey, I.
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Bathynellacea
Parabathynellidae
Racovitzaibathynella
Racovitzaibathynella beninensis

description: Racovitzaibathynella beninensis Camacho and Lagnika sp. n.
(Figures 2–4)
urn:lsid:zoobank.org:pub: urn:lsid:zoobank.org:act: 492703A7-520A-4ED7-B793-B3ECF46E0CB6
Material examined
Type locality. Modern wells (BEN147), Vanhoui, Djougou, Donga, Benin (9.56519°N, 1.82198°E, 388 m alt.; WGS84), 28/08/2017 (one female) and 27/05/2018 (one male); collected by M. Lagnika, J. Hotepko and P. Martin.
Type material. Holotype male (MNCN 20.04 /20,703), allotype female (MNCN 20.04 / 20,704), type series comprised of the two specimens, each on an individual slide, and two DNA samples as the DNA types (MNCN / ADN 54919 male and MNCN / ADN 54873 female).
Description
Body. Total length of holotype 1.1 mm and allotype 0.91 mm. Body elongated (Figure 2), segments widening towards posterior end; approximately 9 times as long as wide. Head one-third longer than wide. All drawings are of the (male) holotype except for ThVIII, antenna, labrum and Md of the allotype (female).
Antennule. (Figure 3 (a)). Six-segmented; length of first three articles 1.4 times longer than other three articles combined; sixth article as long as the third article but half as wide; inner flagellum rectangular, large, and half the height of the fourth article; setation as in Figure 3 (a); article three with three smooth setae; article five with three terminal aesthetascs, similar in size; sixth article with three aesthetascs, one slightly shorter than the other two. AI longer than AII.
Antenna. (Figure 3 (b)). Five-segmented; as long as the first four articles of AI; first two articles are similar in length; the third is the shortest, the fourth is 2.5 times longer than the first two, and the fifth is slightly shorter than the fourth one; last article with three setae: one smooth, one plumose and one outer seta transformed into a long strong fang that is curved inwards (sexual dimorphism); setal formula: 0/0/1 + 0/1 + 0/3(1).
Antenna of the allotype. (Figure 3 (c)). Similar to that of the holotype but with four setae on the last article, with the outer seta smooth and not transformed; setal formula: 0/0/ 1 + 0/1 + 0/4(1).
Labrum. (Figure 3 (d)). Distal edge concave, with 12 teeth, the lateral ones somewhat smaller than the central ones.
Labrum of the allotype. (Figure 3 (e)). Similar to the male’s but with fewer teeth, only 11; the central teeth are triangular and slightly larger than the lateral ones.
Mandible. (Figure 3 (f)). Pars incisiva with three teeth on the distal part, and a well-developed tooth on the ventral edge; pars molaris with four claws, the two most proximal joined and with many fine hairs; mandibular palp, one-segmented, with a distal seta that extends beyond the pars incisiva.
description: Published as part of Camacho, A. I., Mas-Peinado, P., Lagnika, M., Martin, P., Dorda, B. A. & Rey, I., 2024, First record of Bathynellacea (Crustacea: Malacostraca) in Benin (West Africa): two new species and their phylogenetic position within the Parabathynellidae family, pp. 570-602 in Journal of Natural History 58 (17 - 20) on pages 578-579, DOI: 10.1080/00222933.2024.2353941, http://zenodo.org/record/13219566