Cladistic analysis and taxonomic revision of the genus Poecilocricus Schubart, 1962 (Diplopoda, Spirobolida, Rhinocricidae)

This paper offers the first cladistic analysis of the poorly known millipede genus Poecilocricus Schubart, 1962, from Brazil. The data set was composed of 18 taxa and 40 morphological characters. We performed a parsimony analysis by exhaustive search ( i e ; implicit enumeration) under equal weights...

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Bibliographic Details
Published in:Organisms diversity & evolution 2022-03, Vol.22 (1), p.141-160
Main Authors: Rodrigues, Patrícia Elesbão Silva, Campos, Luiz Alexandre, Rodrigues, Everton Nei Lopes
Format: Article
Language:English
Subjects:
Analysis
Animal Systematics/Taxonomy/Biogeography
Apexes
Biodiversity
Biomedical and Life Sciences
Branches
Cladistic analysis
Developmental Biology
Enumeration
Evolutionary Biology
Geographical distribution
Identification keys
Life Sciences
New species
Original Article
Physical characteristics
Plant Systematics/Taxonomy/Biogeography
Revisions
Setae
Taxonomic revision
Taxonomy
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Summary:This paper offers the first cladistic analysis of the poorly known millipede genus Poecilocricus Schubart, 1962, from Brazil. The data set was composed of 18 taxa and 40 morphological characters. We performed a parsimony analysis by exhaustive search ( i e ; implicit enumeration) under equal weights (EW) in TNT 1.5. One most parsimonious tree with 78 steps (CI = 0.57; RI = 0.79) recovered the monophyly of the genus. Poecilocricus was supported by the following synapomorphies: median portion of mentum of the gnathochilarium with a large and rounded protuberance; second body ring excavated in ventral view; seventh body ring with internal extension on sternite; coxae of leg pairs 5, 6, and 7 expanded into a long process; apex of coxae of leg pair 3 with short thin setae on apex; medial portion of coxite of anterior gonopod with similar round bulge at both sides in anterior view; telopodite of posterior gonopod with external branch bifurcated in two short branches; and solenomere short and lanceolated. In addition, we conducted a taxonomic revision of the genus providing redescription of the type species Poecilocricus singularis Schubart, 1962, and the description of the four new species: P . mataraca sp. nov ., P . vazante sp. nov. , P . itacarambiensis sp. nov. and P . lina sp. nov . Furthermore, we include an identification key to the males and a distribution map for all species of the genus.
ISSN:1439-6092
1618-1077
DOI:10.1007/s13127-021-00527-7