Cristarmadillidium, ARCANGELI, 1935

Recuero, Ernesto, Rodríguez-Flores, Paula C. & García-París, Mario, 2022, Homoplasy and morphological stasis revealed through multilocus phylogeny of new myrmecophilous species in Armadillidiidae (Isopoda: Oniscidea), Zoological Journal of the Linnean Society 194 (4), pp. 1312-1340 : 1319

publication ID

https://doi.org/ 10.1093/zoolinnean/zlab066

publication LSID

lsid:zoobank.org:pub:A80D69C9-219C-40AA-B07E-FE6DEB567497

DOI

https://doi.org/10.5281/zenodo.6459248

persistent identifier

https://treatment.plazi.org/id/BD486271-FF9E-8D51-3BEE-FB46FC5CFC8E

treatment provided by

Plazi

scientific name

Cristarmadillidium
status

 

CRISTARMADILLIDIUM ARCANGELI, 1935 View in CoL

Type species: Armadillidium muricatum Budde- Lund, 1885, by original designation. Originally described as a subgenus of Armadillidium ( Arcangeli, 1935) .

Diagnosis: According to Arcangeli (1936), Vandel (1954a) and the new species here described, Cristarmadillidium is diagnosed by their Eluma - type head, reduced eye size (from four to six ommatidia in C.myrmecophilum totento 12in C.muricatum ),absence of clear sexual dimorphism in pereopod 7, presence ( C. myrmecophilum ) or not ( C. muricatum , C. breuili , Cristarmadillidium zaragozai Cifuentes & Prieto, 2020 and Cristarmadillidium alticola Cifuentes, 2021 ) of a small schisma in pereonite 1 epimera; tubercles developed ( C. muricatum and C. zaragozai ), obsolete ( C. breuili and C. myrmecophilum ) or absent ( C. alticola ); outer margin of pereonite 2 epimera straight; shape of distal part of pereonite 4 epimera narrow and rounded, of pereonite 5 epimera rounded, broader than 4 but narrower than other epimera; large areas of pereon, pleon and epimera, and of telson and uropod exopods, covered by rounded, concave papillae (but see Garcia, 2020); glandular fields in pereonites 2 and 3 epimera transversely elongated, located far from the lateral margin, medially in epimera 2, submedially in epimera 3; and pleopod 2 exopod only slightly longer (1.11–1.30 times) than wide.

Remarks: The tegument microstructures resembling rounded, concave papillae, which are present on large areas of the body surface ( Figs 5D, E View Figure 5 , 6D, E View Figure 6 , 7D, E View Figure 7 ), resemble those described or illustrated in at least three other Armadillidiidae species: Echinarmadillidium cycladicum Schmalfuss & Sfenthourakis, 1995 , Platanosphaera cavernarum (Vandel, 1958) and Eluma praticola Taiti & Rossano, 2015 (Schmalfuss & Sfenthourais, 1995; Schmalfuss et al., 2004; Taiti & Rossano, 2015).

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