Cloeon, Leach, 1815

Kluge, Nikita J., 2020, New subgenus Monilistylus subgen. n. and a new species Procloeon (Monilistylus) ornatipennis sp. n. (Ephemeroptera: Baetidae: Procloeon), Zootaxa 4742 (3), pp. 573-587 : 574-576

publication ID

https://doi.org/ 10.11646/zootaxa.4742.3.11

publication LSID

lsid:zoobank.org:pub:B5B11009-059B-4DC1-85B6-831A67B72166

DOI

https://doi.org/10.5281/zenodo.3684998

persistent identifier

https://treatment.plazi.org/id/03BE87E8-FF9E-7F1C-9CF7-FB4D521FF828

treatment provided by

Plazi

scientific name

Cloeon
status

 

Cloeon View in CoL View at ENA /fg1

Branch «6»: Kluge & Novikova 1992: Fig. 11 View FIGURES 9–25 .

Hierarchica name: Cloeon /fg1: Kluge 2012: 362.

Tribus Cloeonini: Kluge 2016: 492.

Diagnosis of Cloeon /fg1.

Larva. Both mandibles with dense setae between prostheca and mola ( Figs 4 View FIGURES 1–8 , 18, 20 View FIGURES 9–25 ). Labial palp with 3rd (distalmost) segment truncate ( Figs 26–27 View FIGURES 26–29 ). On anterior side of tibia, proximal end of patella-tibial suture bent distally and connected under acute angle with row of long thin hairs ( Figs 30–31 View FIGURES 30–32 ) (patella-tibial suture has equal structure on all legs – see Anteropatellata). Claw symmetric, slightly curved, with 2 similar rows of denticles ( Fig. 32 View FIGURES 30–32 ); in some taxa without denticles. Abdominal segment IX and often one or several previous uromeres with longitudinal row of spines on each lateral margin ( Fig. 35 View FIGURES 33–38 ). Tergalii often with anal-proximal expansion curved dorsally and forming a second (dorsal) lamella of tergalius; this lamella is absent in selected species of Procloeon /g1, including both species of Monilistylus ( Figs 9–15 View FIGURES 9–25 ). Tergalii able to intensive rhythmic respiratory movements. Larval cerci and paracercus with dark rings on each 4th joining ( Fig. 8 View FIGURES 1–8 ).

Subimago. All tarsomeres covered with pointed microlepides, without blunt microlepides. Process of posterodorsal angle of postsubalar sclerite diminished, pointed, with concave antero-dorsal margin ( Fig. 43 View FIGURES 39–46 ) (unlike other Turbanoculata, in which this process is larger and has convex antero-dorsal margin).

Winged stages (imago and subimago). On fore wing each space with no more than 1 marginal intercalary ( Fig. 44 View FIGURES 39–46 ). Hind wing, if present, of « Centroptilum - type »: relatively narrow and long, with hooked costal projection (in both species of Monilistylus hind wings absent).

Male genitals. Gonovectes fused by their median ends with penial bridge, unable for protraction ( Fig. 52 View FIGURES 52–54 ). Gonostylus with 2nd segment thickened apically, 3rd (distalmost) segment clavate ( Figs 49 View FIGURES 47–51 , 53 View FIGURES 52–54 ). In mature larva ready to molt to subimago, subimaginal gonostyli folded under larval cuticle by « Cloeon - type »: 2nd segment directed laterally, 3rd segment curved either caudally ( Fig. 34 View FIGURES 33–38 ), or caudally-medially.

Composition. Taxon Cloeon /fg1 includes Similicloeon Kluge & Novikova 1992 (= Intercloeon Kluge & Novikova 1992 ), Cloeon /fg2 (or genus Cloeon Leach 1815 s. str.), Waynokiops Hill, Pfeiffer & Jacobus 2010 , Pseudocentroptilum Bogoescu 1947 [with the single species P. unguiculatum Tshernova 1941 (= P. motasi Bogoescu 1947 )] and Procloeon /g1 (see below).

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Ephemeroptera

Family

Baetidae

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