Pacificabathynella yupik Camacho & Newell & Crete & Dorda & Casado & Rey 2015, sp. nov.

• Main Authors: Camacho, A. I., Newell, R. L., Crete, Z., Dorda, B. A., Casado, A., Rey, I.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2015
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Bathynellacea; Bathynellidae; Pacificabathynella; Pacificabathynella yupik; Newell; Seta; Kuskokwim; Yupik; Alaska
• Online Access: https://zenodo.org/record/4324001; https://doi.org/10.5281/zenodo.4324001

Pacificabathynella yupik sp. nov. (Figures 1–5) Material examined Type locality. Kwethluk River, tributary of Kuskokwim River western Alaska (USA); coordinates N60.34520, W161.089146 and Z 1268 (WGS84); 24 June 2012 (32 females, five males and five subadult specimens); collected by Zach Crete. All specimens collected belong to the type series, 37 morphotypes, together with DNA extractions from five subadult specimens used for molecular analysis, five DNA types. Details of the description are based on all adult specimens. The holotype is a male (MNCN 20.04 /10092), the allotype is a female (MNCN 20.04 /10093) and the morphological type series contains four males (MNCN 20.04 /10125 to 10128) and 31 females (MNCN 20.04 /10094 to 10124). The molecular type series contains five DNAtypes (MNCN / ADN 29963 to MNCN / ADN 29967). Abbreviations used: Th, thoracopod; A.I, antennule; A.II, antenna; Md, mandible, Mx.I, maxillule and Mx.II maxilla. Description Body. Total length of holotype 1.11 mm and allotype 1.11 mm. Total length of males 1.11 – 0.90 mm, of females 1.18 – 0.74 mm. For variability see Table 3. Body not very elongated; almost cylindrical, approximately nine times as long as wide; segments slightly widening towards posterior end. Head as long as wide. Pleotelson with one plumose dorsal seta on either side, similar to furcal rami. All drawings are of the holotype (male) except for Th VIII and one figure of Md, paragnath and Th VI that belong to the allotype (female). Antennula (Figure 2A). Seven-segmented; length of first three segments similar to other four segments combined; segments four and five smaller than others and with similar length; sixth segment shorter than seventh that is the longest; inner flagellum almost trapezoidal; setation as in Figure 2A; two aesthetascs on sixth and three on seventh segments. A.I slightly longer than antenna. Antenna (Figure 2B). Eight-segmented; slightly shorter than A.I; first four segments almost as long as fifth and sixth; eighth terminal segments slightly longer than ...