Trischizostoma longirostrum Chevreux 1919

• Main Authors: Freire, Pablo R., Serejo, Cristiana S.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2004
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Amphipoda; Lysianassidae; Trischizostoma; Trischizostoma longirostrum; Northeast Atlantic
• Online Access: https://doi.org/10.5281/zenodo.6271764; http://treatment.plazi.org/id/03A012206C018071D033FA5C903BFE42

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, 15º 47.725' S, 038º 21.973' W to 15º 46.378' S, 038º 24.839' W, 2076m. 12/ 06/ 2000; 1 female, 47 mm, ovigerous, MNRJ 15141. Stn. E­0528, 19º 45.258' S, 039º 03.003' W to 19º 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 19º 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 3­articulate 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 carpus; dactylus reduced. ...