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  • Austropallene halanychi sp. nov., a new species of sea spider (Pycnogonida, Callipallenidae) from the Ross Sea, Antarctica
Title: Austropallene halanychi sp. nov., a new species of sea spider (Pycnogonida, Callipallenidae) from the Ross Sea, Antarctica
Here we presentAustropallene halanychisp. nov., a new species of pycnogonid within the family Callipallenidae (Pycnogonida), collected from the Ross Sea, Antarctica. While retaining key morphological features known for the genusAustropalleneHodgson, 1915a, the new species is distinguished from congeners by its much larger size, along with the combined absence of a denticle on the inner surface of the fixed finger of the chelifore claw along with the presence of small conical outgrowths where the fixed finger of the chelifore claw meets the movable finger on both the dorsal and ventral sides, and also the ability to fully close the chelifore claw. Additionally, the complete mitochondrial genome ofA. halanychiis consistent with other members of the genusAustropallenein terms of gene order and directionality. A phylogenetic tree consisting of mitochondrial protein-coding gene data placesA. halanychias sister toAustropallene cornigera(Möbius, 1902). Additionally, a phylogenetic tree constructed using partial COI data from other callipallenids placed the new species in a clade containing the genusAustropallene. The combination of molecular data in addition to key morphological differences from similar species in the genus leaves no doubt that the new taxon is a new Antarctic species ofAustropallene.  more » « less
Award ID(s):
1916665
PAR ID:
10534195
Author(s) / Creator(s):
;
Publisher / Repository:
ZooKeys
Date Published:
Journal Name:
ZooKeys
Volume:
1185
ISSN:
1313-2989
Page Range / eLocation ID:
163 to 180
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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