The first record of Syncarida in Montana, USA: a new genus and species of Parabathynellidae (Crustacea, Bathynellacea) in North America

Abstract

Montanabathynella salish gen. nov. sp. nov., of the family Parabathynellidae, from Montana, USA, is described. The new species displays several exclusive characters: distal endite of the maxillule with nine claws and a very large and distinctive male thoracopod 8 with four lobes in the basal penial region and a long recurved exopod without setation. It also presents a unique combination of characters: antennule seven-segmented; antenna six-segmented; labrum with 18 teeth; exopod of thoracopods three-to six-segmented, endopod with one dorsal seta on the first and second segments and epipod only present on thoracopods 4 to 7; pleopods absent; endopod of thoracopod 8 male with two setae and exopod without setae; female thoracopod 8 having two segments, first segment with two groups of denticles and the second one with three long barbed setae; 15 spines on sympod, four spines and spinous process on endopod and 12 setae on exopod of uropod.

First record of Syncarida from Queensland, Australia, with description of two new species ofNotobathynellaSchminke, 1973 (Crustacea, Bathynellacea, Parabathynellidae)

“…In China and Vietnam three new genera have been described (Camacho 2005;Camacho et al 2006). There has also been a new genus recently described from a small area of Montana (USA) (Camacho, Stanford and Newell 2009), which also contained three new species of Pacificabathynella, a genus previously known only from California (Camacho, Newell and Reid 2009). Several new species of Hexabathynella Schminke, 1973 have also recently been described from California (Cho 2001).…”

“…nov. from other members of the genus ( Table 2). Billibathynella humphreysi Cho, 2005 and Montanabathynella salish are the only other parabathynellid species known to have more than seven claws on the distal endite of the Mx I (ten and nine, respectively) (Camacho, Stanford and Newell 2009). Setal formula 0/0/1/2/0/6(1) 0/0/1/2/4(1)…”

New stygofauna from Texas, USA: three new species of Parabathynellidae (Crustacea: Bathynellacea)

“…Family PARABATHYNELIDAE Noodt, 1965 The three new species described herein belong to the genera Montanabathynella and Texanobathynella. Montanabathynella was previously considered to be monotypic, whereas Montanabathynella salish Camacho et al, 2009 was known only from the alluvial flood plains of Flathead River, (AJ well, Jocko River, Lake County, 11 May 2004, and well station SR HYP 238, Flathead County, 2 February 2004; eight males and five females) in Montana (USA). The type species Texanobathynella bowmani was found initially in Gorman Cave, San Saba County, and Roaring Springs, Travies Country, Texas (USA) (Delamare Deboutteville, 1973; five specimens).…”

“…Montanabathynella Camacho et al, 2009 Amended diagnosis Antennule 7-segmented with terminal aesthetascs present on fifth to seventh segments. Antenna 6-segmented.…”

“…Taxonomic characters of the species of Texanobathynella Delamare Deboutteville, Coineau andSerban, 1975, Montanabathynella Camacho, Stanford andNewell, 2009 and Parabathynella Noodt, 1965 genera: 1. T. bowmani Delamare Deboutteville,Serban and Coineau, 1975; 2.…”