Isohypsibiidae

Gąsiorek, Piotr, Stec, Daniel, Morek, Witold & Michalczyk, Łukasz, 2019, Deceptive conservatism of claws: distinct phyletic lineages concealed within Isohypsibioidea (Eutardigrada) revealed by molecular and morphological evidence, Contributions to Zoology 88 (1), pp. 78-132 : 128-129

Composition of Isohypsibiidae

Genus: Dastychius Pilato, 2013

Species: D. improvisus (Dastych, 1984) .

Genus: Dianea gen. nov. Remarks: As stressed by Ramazzotti & Maucci (1983) for Isohypsibius s.l. spp. described by Mihelčič & Iharos, the genus consists mainly of dubious and improperly described species, which very likely are synonyms of the nominal species, D. sattleri comb. nov. Here, I. papillifer bulbosus (Marcus, 1928) is supressed due to lack of significant differences between the putative subspecies and the nominal subspecies. On the other hand, the subspecies Isohypsibius papillifer indicus (Iharos, 1969) is elevated to the species rank because of significant morphological differences with the nominal subspecies such as two macroplacoids instead of three, larger and more triangular gibbosities, and no cephalic gibbosities. Given that within Dianea gen. nov., the specific name ‘ indica ’ is already occupied by D. indica (Murray, 1907) , a nomen novum D. acuminata comb. nov. is established for I. papillifer indicus (Iharos, 1969) (from Latin acuminatus = acute, sharp, which refers to the elongated gibbosity apices).

Genus: Eremobiotus Biserov, 1992

Species: D. acuminata nom. nov. et comb. nov. Species: E. alicatai (Binda, 1969) , E. ginevrae [ Isohypsibius papillifer indicus (Iharos, 1969) ], Lisi et al., 2016, E. ovezovae Biserov, 1992 .

D. basalovoi (Durante & Maucci, 1973) comb.

nov., D. belliforma (Mihelčič, 1971) comb. Genus: Fractonotus Pilato, 1998

nov. et sp. dub., D. bella (Mihelčič, 1971)

comb. nov. et sp. dub., D. brevispinosa (Iha- Species: F. caelatus (Marcus, 1928) , F. verruco-

ros, 1966) comb. nov. et sp. dub., D. costata sus (Richters, 1900), F. gilvus (Biserov, 1986) .

(Mihelčič, 1971) comb. nov. et sp. dub., D. ef-

fusa (Mihelčič, 1971) comb. nov. et sp. dub., D. Genus: Isohypsibius Thulin, 1928

franzi (Mihelčič, 1951) comb. nov. et sp. dub.,

D. helenae (Iharos, 1964) comb. nov. et nom. Species: I. altai Kaczmarek & Michalczyk ,

inq., D. indica (Murray, 1907) comb. nov. et 2006, I. arbiter Binda, 1980 , I. archangajensis nom. inq., D. mammillosa (Iharos, 1964) comb. Kaczmarek & Michalczyk, 2004, I. arcuatus nov. et sp. dub., D. papillifera (Murray, 1905) (Bartoš, 1934) , I. barbarae Pilato & Binda , comb. nov., D. sattleri (Richters, 1902) comb. 2002, I. borkini Tumanov, 2003 , I. brulloi Pi-

nov., D.rahmi (Li & Wang, 2006) comb. nov., D. lato & Pennisi, 1976, I. cambrensis (Morgan, tuberculoides (Mihelčič, 1951) comb. nov. et sp. 1976) comb. nov., I. campbellensis Pilato, 1996 , dub., D. vejdovskyi (Bartoš, 1939) comb. nov. et I. canadensis (Murray, 1910) sp. dub., I. ceciliae nom. inq. Pilato & Binda Downloaded , 1987from, I. Brill changbaiensis.com 12/12/2023 Yang 02:59,:51PM via Open Access. This is an open access article distributed under the terms of the prevailing CC-BY license at the time of publication. http://creativecommons.org/licenses/by-nc/4.0 1999 sp. dub., I. chiarae Maucci, 1987 , I. con- closely related to Fractonotus than to Isohypdorcanquii Kaczmarek et al., 2014, I. coulsoni sibius s.s., and their systematic position may Kaczmarek et al., 2012, I. damxungensis Yang , change when more ample molecular data are 2007 sp. dub., I. dastychi Pilato et al., 1982 , available.

I. glazovi Biserov, 1999 , I. hadzii (Mihelčič,

1938) sp. dub., I. jakieli Dastych, 1984 , I. jing- Genus: Ursulinius gen. nov.

shanensis Yang, 2003 sp. dub., I. jinhouensis

Yang, 2007 sp. dub., I. liae Li & Wang, 2006 Species: U. austriacus (Iharos, 1966) comb.

nom. inq., I. macrodactylus (Maucci, 1978) , nov., U. bartosi (Iharos, 1966) comb. nov. et sp.

I. marcellinoi Binda & Pilato, 1971 , I. palmai Pi- dub., U. bulbifer (Mihelčič, 1957) comb. nov. et lato, 1996, I. panovi Tumanov, 2005 , I. pauper sp. dub., U.cameruni (Iharos, 1969) comb. nov., (Mihelčič, 1971) nom. inq., I. prosostomus Thu- U. cyrilli (Mihelčič, 1951) comb. nov., U. dudichi lin, 1928, I. pseudundulatus (da Cunha & do (Iharos, 1964) comb. nov., U. duranteae (Mauc- Nascimento Ribeiro, 1964), I.reticulatus Pilato , ci, 1978) comb. nov., U. elegans (Binda & Pilato, 1973, I. sabellai Pilato et al., 2004 , I. schaudinni 1971) comb. nov., U. eplenyiensis (Iharos, 1970) (Richters, 1909) nom. inq., I. sculptus (Ramaz- comb. nov., U. glaber (Durante Pasa & Mauczotti, 1962) , I.sellnicki (Mihelčič,1962) , I.solidus ci, 1979) comb. nov., U. gracilis (Iharos, 1966) (Mihelčič, 1971) , I. taibaiensis Li & Wang , comb. nov. et nom. inq., U. gyulai (Mihelčič, 2005, I. tuberculatus (Plate, 1889) nom. inq., 1971) comb. nov. et sp. dub., U. hypostomoides I. undulatus Thulin, 1928 , I. verrucosus (Della (Mihelčič, 1971) comb. nov., U. josephi (Iharos, Valle, 1915) nom. inq., I. wilsoni (Horning et al., 1964) comb. nov., U. latiunguis (Iharos, 1964) 1978), I. yunnanensis Yang, 2002 sp. dub. comb. nov. et nom. inq., U. leithaicus (Iharos, 1966) comb. nov., U. lunulatus (Iharos, 1966) Remarks: I. cambrensis is raised to a species comb. nov. et nom. inq., U. mihelcici (Iharank because of the significant distinctiveness ros, 1964) comb. nov. et nom. inq., U. montafrom I. prosostomus both in terms of external nus (Mihelčič, 1938) comb. nov. et nom. inq., morphology (finely granulated vs completely U. neoundulatus (Durante Pasa & Maucci , smooth cuticle) and genetics ( fig. 2 ). On our 1975) comb. nov., U. nodosus (Murray, 1907) phylogenetic tree, the clade I. dastychi + Er- comb. nov., U. novaeguineae (Iharos, 1967) emobiotus + Ursulinius gen. nov. can be ob- comb. nov., U. pappi (Iharos, 1966) comb.

served ( fig. 2 ). In our opinion, widely forked nov., U. pilatoi (Durante Pasa & Maucci, 1979) claws in the dastychi complex ( I.borkini , I.das- comb. nov., U. pratensis (Iharos, 1964) comb.

tychi, I.jakieli , I.marcellinoi , and I.panovi ) bear nov. et nom. inq., U. qinlingensis (Li et al., resemblance to Eremobiotus type claws. This 2005) comb. nov., U. roberti (Biserov, 1996) characteristic, together with only two granu- comb. nov., U. ronsisvallei (Binda & Pilato, lar macroplacoids in the pharynx and smooth 1969) comb. nov., U. rudescui (Iharos, 1966)

or weakly reticulated cuticle, which make comb. nov., U. septentrionalis (Thulin, 1928) the dastychi complex stand out from Isohyp- comb. nov., U. silvicola (Iharos, 1966) comb.

sibius s.s. could warrant erecting a new genus nov. et nom. inq., U. theresiae (Iharos, 1964) for the dastychi complex if new data support comb. nov. et nom. inq., U. torulosus (Mihelčič, the hypothetical monophyly of the complex. 1959) comb. nov., U. truncorum (Iharos, 1964) As noted by Gąsiorek et al. (2019), species comb. nov., U. tucumanensis (Claps & Rossi, with very pronounced cuticular sculpture 1984) comb. nov., U. woodsae (Kathman, 1990)

( I. barbarae , I. sabellai ) are potentially more comb. nov. Downloaded from Brill.com 12/12/2023 02:59:51PM via Open Access. This is an open access article distributed under the terms of the prevailing CC-BY license at the time of publication. http://creativecommons.org/licenses/by-nc/4.0 Remarks: Within the genus many species need to be revisited, and their diagnoses updated, but, in contrast to Dianea gen. nov., the majority of them seems to be valid. Correct reanalyses of the gibbosity arrangement are crucial for the taxonomy of Ursulinius gen. nov.

Figures

figure 2 The phylogeny of Isohypsibioidea Sands et al., 2008 based on concatenated 18S rRNA and 28S rRNA seqences.New families and genera are marked in bold.Values above branches indicate Bayesian posterior probability values (BI), whereas those under branches show bootstrap values (ML).Branches with support below 0.9 in BI (70% in ML) were collapsed. Scale bar and branch lengths refer to the Bayesian analysis