Pseudomma melandi Vicente, 2011, n. sp.

• Main Author: Vicente, Carlos San
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2011
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Mysida; Mysidae; Pseudomma; Pseudomma melandi; Bellingshausen Sea
• Online Access: https://doi.org/10.5281/zenodo.6192850; http://treatment.plazi.org/id/055EAD64E0083A51A4E10ABD3F2CF865

Pseudomma melandi n. sp. (Figs. 4–7) Type locality Station 31TA, Bellingshausen Sea, 69º57’49”S – 86º22’23”W, 1395 m depth, 10–50 cm water layer above bottom, sediment with a medium organic matter content (5.3%) and a high percentage of mud (72.2%) and fine sand (20.7%), 28 January 2006. Material examined. Holotype (ICMM /2010/10/003). Immature female (15.7 mm TL). Paratypes (ICMM /2010/10/004). Two immature males (5.2 and 4.0 mm CL), 3 immature females (10.8 mm TL, 4.6 mm CL, 3.6 mm CL) same locality. Diagnosis. Antero-lateral margins of ocular plates serrated with 8 conspicuous serrations. Posterior part of telson armed with five pairs of setae which increase in size distally. Description. The morphological characteristics refer to both sexes, unless otherwise stated. Carapace with anterior margin evenly rounded and anteriorly produced lateral corners; posterior margin emarginated dorsally, leaving last thoracic somite partially uncovered. First five segments of abdomen subequal in length; sixth somite about twice the length of the fifth (Fig. 4 A). Ocular plate extending to mid-portion of first segment of antennular peduncle; plate with well-marked median anterior cleft; antero-lateral margins serrated with eight serrations (Fig. 4 B). Antennular peduncle half as long as antennal scale. First article wider than long, with a medial ventral carina, outer distal corner armed with three setae; second article short, one half as long as broad, armed with three setae on the inner margin, the distal one very conspicuously plumose; third article slightly longer than broad, armed with six spinose setae on the inner margin, third segment of immature male peduncle supporting an incipient appendix masculine (Fig. 4 C). Sympod of antenna with outer distal angle produced into a long acute process. Antennal and antennular peduncles subequal in length. First article of antennal peduncle shorter, as long as broad, with the inner proximal margin rounded; second and third articles subequal in length; inner distal margin of ...