Parahypsibius Gąsiorek, 2024

Parahypsibius Gąsiorek gen. nov.

urn:lsid:zoobank.org:act:4516C76C-F0EB-443F-A809-C29EB43F38FB .

Type species: Hypsibius scabropygus Cuénot, 1929 . Diagnosis: Hypsibiids with Ramazzottius -like claws and rigid buccal tube bent posteriorly. Only posterior bars may be present. AISMs asymmetrical, dorsal AISM shorter and higher than ventral, with prominent apex and less evident caudal processes. Pharynx with two granular macroplacoids. Rudimentary elliptical sensory organs present on head. Cuticular sculpturing well developed as protuberances at least in the dorsoposterior body portion, or protuberances cover an entire dorsum. Eggs laid within the exuviae, with granulated chorion.

Etymology: From Greek para - = near, close + Hypsibius , referring to the close relationship between these genera.

Composition: P. biscuitiformis ( Bartoš, 1960) comb. nov.; P. calcaratus ( Bartoš, 1935) comb. nov.; P. camelopardalis ( Ramazzotti and Maucci, 1983) comb. nov.; P. macrocalcaratus

( Beasley, 1988) comb. nov.; P. ragonesei ( Binda and Pilato, 1985) comb. nov.; P. roanensis ( Nelson and McGlothlin, 1993) comb. nov.; P. scabropygus ( Cuénot, 1929) comb. nov.; P. stiliferus ( Abe, 2004) comb. nov.; and P. runae ( Bartoš, 1941) comb. nov. (uncertain, type specimens are unusable due to the crystallization of mounting medium, thus the transfer is done based on simplistic original description).

Geographic distribution: Essentially Holarctic. Among all the species included in the genus, only H. scabropygus was recorded outside of the Holarctic region—from the Palaeotropics ( McInnes 1994). The conspecificity of European and African populations has yet to be demonstrated.

Differential diagnosis: The new genus is compared with all two-macroplacoid hypsibiid genera having a rigid buccal tube, and with Acutuncus Pilato and Binda, 1997 (in Pilato and Binda 1997b) due to the similar mode of egg deposition in the Acutuncus mariae group ( Vecchi et al. 2023). Table 3 View Table 3 shows the differences between all relevant taxa.