Neelus

Folsom, 1896

Species Guides

Neelus murinus

Neelus is a of springtails (Collembola) in the Neelidae, established by Folsom in 1896. The genus contains both surface-dwelling and troglobiotic (cave-restricted) . Several species exhibit troglomorphic adaptations including elongated unguis (claws), larger body size, and elongated antennal . The genus has a broad geographic distribution spanning Europe, North America, and Asia, with notable cave-dwelling diversity in the Balkans.

Neelus murinus by (c) Philippe Garcelon, some rights reserved (CC BY). Used under a CC-BY license.

Neelus murinus (7939037446) by Andy Murray. Used under a CC BY-SA 2.0 license.

Pronunciation

How to pronounce Neelus: /ˈneː.lus/

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Identification

-level identification within Neelus requires examination of chaetotaxy patterns on and legs. Troglobiotic species (N. koseli, N. klisurensis, N. lackovici) can be distinguished by troglomorphic features: elongated unguis, larger body size, and elongated on antennal segment IV. Surface-dwelling species lack these cave adaptations. Comparative tables and dichotomous keys are available in taxonomic revisions.

Images

Habitat

varies by : some occupy surface environments in soil and leaf litter, while others are strictly troglobiotic, restricted to deep cave systems. Troglobiotic species have been documented from caves in eastern Slovakia, Serbia (Kosovo), and Croatia. Surface-dwelling species occur in Europe and North America.

Distribution

Europe (including Balkan caves), North America, and Asia (Himalayan region of Sikkim, India). GBIF records indicate additional occurrences in the Andes, Caribbean, Central Australia, and continental Southeast Asia.

Similar Taxa

Other Neelidae generaNeelus is distinguished within Neelidae by specific chaetotaxy patterns and, in troglobiotic , by the combination of elongated unguis, larger body, and elongated antennal not shared by other in the .

More Details

Troglobiotic diversity

The shows significant troglobiotic radiation in the Dinarides region of the Balkans, with multiple cave-restricted described from Croatia, Serbia, and Slovakia. These represent independent events of subterranean .

Taxonomic resources

Comprehensive identification keys and comparative tables for all known were published in Zootaxa revisions (2010, 2016), providing diagnostic characters for species-level determination.