Cryptocephalus merus
Fall, 1932
case-bearing leaf beetle
Cryptocephalus merus is a small case-bearing leaf beetle in the Chrysomelidae, measuring 3.8–4.3 mm in length. The is known from a restricted distribution in the southwestern United States, with confirmed records from Arizona and Texas and possible occurrence in Mexico. Like other members of the , construct protective cases from fecal material and shed that cover the .
Pronunciation
How to pronounce Cryptocephalus merus: /ˌkrɪptoʊˈsɛfələs ˈmɛrəs/
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Identification
The small size (3.8–4.3 mm) and southwestern U.S. distribution help distinguish this from many . Accurate identification to species level requires examination of genitalic structures and comparison with , as external morphological features among Cryptocephalus species are often subtle. The species was described by Fall in 1932.
Images
Distribution
Confirmed from Arizona and Texas in the United States. Possibly occurs in Mexico, though this requires verification. The has a restricted southwestern Nearctic distribution.
Similar Taxa
- Other Cryptocephalus speciesNumerous occur in North America; distinguishing features include size, distribution, and subtle morphological differences requiring examination
More Details
Taxonomic History
Described by H.C. Fall in 1932. The epithet 'merus' is Latin for 'pure' or 'unmixed', though the specific etymological intent is not documented in available sources.
Collection Records
Based on iNaturalist data, the has been documented in at least 6 observations, though specific locality and details from these records are not summarized in available sources.