Trischizostoma longirostrum Chevreux 1919

• Main Authors: Freire, Pablo R., Serejo, Cristiana S.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2004
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Amphipoda; Lysianassidae; Trischizostoma; Trischizostoma longirostrum; Chevreux; Northeast Atlantic
• Online Access: https://zenodo.org/record/6271764; https://doi.org/10.5281/zenodo.6271764

Trischizostoma longirostrum Chevreux, 1919 (Fig. 3) Trischizostoma longirostre Chevreux 1919: 575; 1927: 43, pl. 1. Material examined. REVIZEE Program, R/V Thalassa col., stn. E­0509, 15 º 47.725 ' S, 038º 21.973 ' W to 15 º 46.378 ' S, 038º 24.839 ' W, 2076m. 12 / 06/ 2000; 1 female, 47 mm, ovigerous, MNRJ 15141. Stn. E­0528, 19 º 45.258 ' S, 039º 03.003' W to 19 º 47.581 ' S, 038º 59.827 ' W, 1237m, 29 /06/2000, 1 female with oostegites, 25 mm, MNRJ 15142. Stn. E­ 0 535, 19º 58.936 ' S, 039º 38.657 ' W to 19 º 56.087 ' S, 039º 35.408 ' W, 1002 m, 01/07/2000, 1 female with oostegites, 39 mm, MNRJ 15143. Type locality. Northeast Atlantic, between Dakar and Cabo Verde Islands. Diagnosis. Eyes present. Maxilliped palp with 4 articles and longer than outer plate. Gnathopod 1 propodus oval and anteriorly excavate. Gnathopod 2, coxa with anterior margin rounded; ischium subequal to carpus in length. Pereopod 3 basis 2 X length of propodus. Telson entire, distally truncate. Description. Female, 39 mm (Fig. 3 A). Rostrum reaching middle of first article of antenna 1 peduncle. Eyes well developed. Antenna 1, first article of peduncle longer than articles 2–3 and shorter than callynophore. Antenna 2, peduncle article 4 subequal in length and broader than article 5. Mandibles with small distal incisor; palp 3 ­articulate and bearing marginal setae. Maxilla 1, inner plate 1 / 3 length of outer plate, with 8 distal setae, palp reduced and attached on median part of outer plate. Maxilla 2, inner and outer plates subequal in length; outer plate with 4 lateral setae. Maxilliped, inner plate shorter than outer plate; palp with 4 articles and longer than outer plate. Gnathopod 1 (Fig. 3 B), strongly subchelate; coxa reduced and partially covered by coxa 2; propodus inverted, oval, anteriorly excavated; palm with stout setae in all its extension and 3 pairs of longer setae distally. Gnathopod 2 (Fig. 3 C), coxa with anterior margin rounded; ischium shorter than basis and subequal to carpus; propodus less than half­length of ...