Caenis Stephens, 1835

publication ID	https://doi.org/ 10.11646/zootaxa.5258.1.2
publication LSID	lsid:zoobank.org:pub:D5B78BB6-E7AB-4CB8-B202-AA617E06F915
DOI	https://doi.org/10.5281/zenodo.7775636
persistent identifier	https://treatment.plazi.org/id/03C41A4F-5D3E-6001-2A80-42CECAA12EBB
treatment provided by	Plazi
scientific name	Caenis Stephens, 1835
status

Key to the known eggs of Caenis Stephens, 1835 View in CoL View at ENA from South India

(Egg characters of Caenis maratha are unknown)

1 Egg with two epithemata ( Fig. 4 View FIGURES 4–7 )......................................................................... 2

- Egg with a single epithema ( Fig. 54 View FIGURES 54–57 )...................................................................... 4

2 Epithemata cap-like ( Fig. 97 View FIGURES 97–99 )......................................................... C. venkataramani sp. n.

- Epithemata thread-like ( Fig. 5 View FIGURES 4–7 )........................................................................... 3

3 Mouth of the micropyle broadened ( Fig. 7 View FIGURES 4–7 )....................................................... C. americani

- Mouth of the micropyle not broadened ( Fig. 17 View FIGURES 16–19 )................................................. C. maduraiensis

4 Epithema cap-like ( Fig. 55 View FIGURES 54–57 )................................................................ C. kaegies sp. n.

- Epithema thread-like ( Fig. 140 View FIGURES 139–142 ).......................................................................... 5

5 Epithema of coiled-rope type without any terminal knobs ( Figs. 140, 141 View FIGURES 139–142 )........................................ 6

- Epithema of coiled-rope type with terminal knobs ( Figs. 154................................................... 7 View FIGURES 152–156

6 Micropyle ca. 3 times the mouth width, mouth broadened ( Fig. 142 View FIGURES 139–142 ).......................... C. arunachalami sp. n.

- Micropyle ca. 2 times the mouth width, mouth not broadened ( Fig. 151 View FIGURES 148–151 )................................. Caenis sp. 1

7 Chorion finely pored ( Srinivasan et al. 2023; Fig. 42 View FIGURES 42–44 ).................................................... C. limai

- Chorion smooth ( Fig. 156 View FIGURES 152–156 )..................................................................... Caenis sp. 2