Jilinus, Lin & Lopardo & Uhl, 2022

Lin, Shou-Wang, Lopardo, Lara & Uhl, Gabriele, 2022, Evolution of nuptial-gift-related male prosomal structures: taxonomic revision and cladistic analysis of the genus Oedothorax (Araneae: Linyphiidae: Erigoninae), Zoological Journal of the Linnean Society 195, pp. 417-584 : 531

JILINUS GEN. NOV.

Type species: Oedothorax hulongensis Zhu & Wen, 1980 .

Derivatio nominis: This genus name derives from the Chinese province Jilin, where the holotype of Jilinus hulongensis was collected. Genus gender neutral.

Diagnosis:

Males: the embolus of his genus initiates from the distal suprategular apophysis with no membranous c o n n e c t i o n, i.e. the c o l u m n is a b s e n t, w h i c h distinguishes this genus from all other erigonines.

Females: The epigyne of this genus has a particulary large chamber at each copulatory opening.

Species included: Jilinus hulongensis ( Zhu & Wen, 1980) comb. nov.

Phylogenetic justification: In the phylogeny ( Fig. 2 ), J. hulongensis appears sister to Clade 9, in a relatively basal position and not closely related to Oedothorax , Callitrichia , Mitrager or other taxa in Clade 13. Several palpal features indicate that this species does not share the synapomorphies with Oedothorax s.s.: embolus directly connected to distal suprategular apophysis without membranous region in between; anterior radical process broad and blunt; marginal suprategular apophysis absent; morphology of palpal tibial retrolateral apophysis and palpal tibial prolateral apophysis. The distinctiveness of this combination of features and its phylogenetic placement does not support transferring this species to any other known erigonine genera either. Therefore, we propose the erection of Jilinus gen. nov. for this species.

Figures

Figure 2. The first part of the three most-parsimonious trees generated from the analysis of Matrix II, with Bremer/ Jackknife support valuesshown beside nodes.The presence/absence of clades in the consensus trees of the most-parsimonious trees of the implied weights analysis with different k values are shown in the box under/on the branches: black for presence when considering all taxa; grey for presence only when Callitrichia convector (Tanasevitch, 2014) and Ca. usitata (Jocqué & Scharff, 1986) are not considered; white for absence.