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Published: 2016-06-16

The Ambrysus Stål (Heteroptera: Naucoridae: Cryphocricinae) of Mexico:
Revision of the subgenus Syncollus La Rivers

Enns Entomology Museum, Division of Plant Sciences, University of Missouri, Columbia, Missouri 65211, U.S.A.
Enns Entomology Museum, Division of Plant Sciences, University of Missouri, Columbia, Missouri 65211, U.S.A.
Instituto de Ecologia, A.C., Carretera Antigua a Coatepec 351, El Haya, 91070 Xalapa, Veracruz, MEXICO.
Heteroptera Nepomorpha new species saucer bug taxonomy


The subgenus Ambrysus (Syncollus) La Rivers is mostly Neotropical and includes nine described species. Features uniting species in this subgenus are related to the position of the propleura with respect to the prosternum in males and females, as well as characteristics of tergum V and the genitalia of males. Three species of Syncollus are known from Mexico including Ambrysus baeus Polhemus & Polhemus, A. circumcinctus Montandon, and A. pygmaeus La Rivers. The remaining six species in the subgenus are distributed in Central and South America. Herein we review Syncollus and revise the Mexican fauna. More specifically, three new species from Mexico are described: A. chiapanecus n. sp., A. totonacus n. sp., and A. xico n. sp. The subspecies A. circumcinctus caliginosus Usinger, A. c. concavus La Rivers, and A. c. extremus La Rivers are proposed as junior synonyms of A. c. circumcinctus Montandon. Ambrysus partridgei De Carlo is transferred from Syncollus to the subgenus Ambrysus.



  1. Davis, J.R. (1986) New distributional records of Naucoridae (Hemiptera) from the United States and Mexico, with morphological and taxonomic notes. The Southwestern Naturalist, 31, 535–539.

    Herrera, F. (2013) Estado del conocimiento y catálogo de la familia Naucoridae (Insecta: Heteroptera) en Centroámerica. Dugesiana, 20, 221–232.

    Hungerford, H.B. (1919) The biology and ecology of aquatic and semiaquatic Hemiptera. The University of Kansas Science Bulletin, 21, 1–341.

    Kirkaldy, G.W. (1906) List of the genera of the pagiopodous Hemiptera-Heteroptera, with their type species, from 1758 to 1904 (and also of the aquatic and semi-aquatic Trochalopoda). Transactions of the American Entomological Society, 32, 117–156, 156a, 156b.

    La Rivers, I. (1951) A revision of the genus Ambrysus in the United States (Hemiptera: Naucoridae). University of California Publications in Entomology, 8, 277–338.

    La Rivers, I. (1952) A new subgenus of Ambrysus from South America (Hemiptera: Naucoridae). Entomological News, 63, 33–39.

    La Rivers, I. (1953) The Ambrysus of Mexico (Hemiptera, Naucoridae). The University of Kansas Science Bulletin, 35, 1279–1349.

    La Rivers, I. (1965) The subgenera of the genus Ambrysus. Biological Society of Nevada Occasional Papers, 4, 1–7.

    La Rivers, I. (1967) Descriptions of new bugs. Biological Society of Nevada Occasional Papers, 14, 1–8.

    La Rivers, I. (1971) Studies of Naucoridae (Hemiptera). Biological Society of Nevada Memoirs, 2, 1–120.

    La Rivers, I. (1974) Catalogue of taxa described in the family Naucoridae (Hemiptera), Supplement No.1: Corrections, emendations and additions, with descriptions of new species. Biological Society of Nevada Occasional Papers, 38, 1–17.

    La Rivers, I. & Nieser, N. (1972) The Ambrysus of Surinam, with the description of a new species, A. bifidus (Hemiptera, Naucoridae). Biological Society of Nevada Occasional Papers, 29, 1–8.

    Lee, C.E. (1991) Morphological and phylogenetic studies on the true water bugs (Hemiptera : Heteroptera). Nature & Life, 21, 1–183.

    Mayr, E. (1982) Of what use are subspecies? The Auk, 99, 593–595.

    Mbogho, A.Y. & Sites, R.W. (2013) Naucoridae Leach, 1815 (Hemiptera: Heteroptera) of Tanzania. African Invertebrates, 54, 513–542.

    Montandon, A.L. (1897) Hemiptera Cryptocerata. Fam. Naucoridae. Sous-fam. Cryptocricinae. Verhandlungen der kaiserlich-königlichen Zoologisch-Botanischen Gesellschaft in Wien, 47, 6–23.

    Montandon, A.L. (1910) Trois espèces nouvelles de la famille Naucoridae. Bulletin de la Société des Sciences de Bucarest-Roumanie, 19, 498–444.

    Morrone, J.J. (2005) Hacia una síntesis biogeográfica de México. Revista Mexicana de Biodoversidad, 76, 207–252.

    Nieser, N., Pelli, A. & de Melo, A.L. (1999) Two new Ambrysinae (Heteroptera: Naucoridae) from Minas Gerais, Brazil. Acta Societatis Zoologicae Bohemicae, 63, 157–163.

    Nieser, N. & Lopez Ruf, M. (2001) A review of Limnocoris Stål (Heteroptera: Naucoridae) in southern South America east of the Andes. Tijdschrift voor Entomologie, 144, 261–328.

    Polhemus, D.A. & Polhemus, J.T. (1988) Family Naucoridae, Leach, 1815: The creeping water bugs. In: Henry, T.J. & Froeschner, R.C. (Eds.), Catalog of Heteroptera, or True Bugs, of Canada and the Continental United States. Brill, Leiden, pp. 521–527.

    Polhemus, J.T. (2008) Aquatic and semiaquatic Hemiptera. In: Merrit, R.W., Cummins, K.W. & Berg, M.B. (Eds.), An Introduction to the Aquatic Insects of North America. Kendal/Hunt, Dubuque, Iowa, pp. 385–423.

    Polhemus, J.T. & Polhemus, D.A. (1981) Three new species of Ambrysus from Mexico (Hemiptera: Naucoridae). The Pan-Pacific Entomologist, 57, 397–401.

    Rodrigues, H.D.D., De Melo, A.A. & Sites, R.W. (2012) Redescription of Ambrysus montandoni La Rivers, 1963 (Hemiptera: Heteroptera: Naucoridae), with the first record for Brazil. Zootaxa, 3357, 63–68.

    Sites, R.W. (2015) New taxa of Cryphocricinae (Heteroptera: Naucoridae) from the Guiana Shield: Hygropetrocoris Sites, n. gen. and two new species of Ambrysus Stål. Zootaxa, 4033 (3), 427–438.

    Sites, R.W. & Reynoso-Velasco, D. (2015) Review of the Ambrysus stali La Rivers species complex (Heteroptera: Nepomorpha: Naucoridae) with the description of a new species from Mesoamerica. Zootaxa, 4018 (2), 279–291.

    Sites, R.W. & Shepard, W.D. (2015) Neotropical Genera of Naucoridae (Hemiptera: Heteroptera: Nepomorpha): New species of Ambrysus and Procryphocricos from Belize and Peru. Annals of the Entomological Society of America, 108, 613–620.

    Sites, R.W., Willig, M.R. & Linit, M.J. (2003) Macroecology of aquatic insects: A quantitative analysis of taxonomic richness and composition in the Andes mountains of northern Ecuador. Biotropica, 35, 226–239.

    Stål, C. (1862) Hemiptera Mexicana enumeravit speciesque novas descripsit (continuatio). Stettiner Entomologische Zeitung, 23, 437–462.

    Štys, P. & Jansson, A. (1988) Check-list of recent family-group and genus-group names of Nepomorpha (Heteroptera) of the world. Acta Entomologica Fennica, 50, 1–44.

    Usinger, R.L. (1941) Key to the subfamilies of Naucoridae with a generic synopsis of the new subfamily Ambrysinae (Hemiptera). Annals of the Entomological Society of America, 34, 5–16.

    Usinger, R.L. (1946) Notes and descriptions of Ambrysus Stål with an account of the life history of Ambrysus mormon Montd. (Hemiptera, Naucoridae). The University of Kansas Science Bulletin, 31, 185–210.

    Wilson, E.O. & Brown, W.L. Jr. (1953) The subspecies concept and its taxonomic application. Systematic Zoology, 2, 97–111.