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Cladistic study, taxonomic restructuring, and revision of the myrmecophilous tribe Leptanillophilini with comments on its evolution and host relationships (Coleoptera: Staphylinidae: Hymenoptera: Formicidae).

Estudio cladístico, reestructuración taxonómica y revision te la tribu mirmecófila Leptanillophilini con comentarios sobre su evolución y relaciones de hospederos (Coleoptera: Staphylinidae: Hymenoptera: Formicidae). Sociobiology. v. 18, no. 1 p. 1-150. 1991.
Author(s):
Jacobson, H.R.; Kistner, David H. California State University Department of Biological Sciences Chico, CA 95929-0515 US E-mail: dkistner@csuchico.edu.

Keywords:
ANIMALS. INVERTEBRATES. ARTHROPODS. INSECTS. COLEOPTERA. POLYPHAGA. STAPHYLINOIDEA. STAPHYLINIDAE. LEPTANILLOPHILINI. LABIDOMIMUS CORNUTUS. LABIDOMIMUS INCERTUS. MIMECITON MARIANAE. MIMECITON GIGAS. PARAMIMECITON RETTENMEYERI. PSEUDOMIMECITON ANTENNATUM. ECITON PRAEDATOR. MIMACAMATUS LONGICEPS. HYMENOPTERA. ACULEATA. APOCRITA. FORMICOIDEA. FORMICIDAE. NEW SPECIES. LABIDUS COECUS. LABIDOGLOBUS NEVERMANNI. LABIDOSPHAERULA SCHMIDTI. LABIDOPULLUS ASHEI. LABIDUS COECUS. ECITON COECUM. EVOLUTION. MIMICRY. BEHAVIOUR. ASSOCIATIONS. MYRMECOPHILOUS INSECTS. NEST AND BURROW FAUNA. ASSOCIATIONS. MIMONILLA ECITONIS. TAXONOMY. COSTA RICA. PANAMA. CENTRAL AMERICA. ECUADOR. SOUTH AMERICA. MONTEVERDE CLOUD FOREST RESERVE. AREA DE CONSERVACION ARENAL TILARAN. FINCA LA CAJA. LA URUCA (DISTRITO). SAN PEDRO DE MONTES DE OCA. TRES RIOS DE LA UNION. MORAVIA DE CHIRRIPO. AREA DE CONSERVACION CORDILLERA VOLCANICA CENTRAL. LAS CRUCES BIOLOGICAL STATION. AREA DE CONSERVACION LA AMISTAD PACIFICO. PENINSULA DE OSA. AREA DE CONSERVACION OSA. BARRO COLORADO NATURE MONUMENT.

Summary:
The tribe Leptanillophilini, all of whose members are found with army ants of the genera Neivamyrmex, Labidus, and Nomamyrmex, is redefined and redescribed to contain the Mimeciton, Labidopullus, and Leptanillophilus groups of Seevers (1965). All of the genera are redescribed and illustrated and the genus Pseudomimeciton is resurrected from synonymy with Mimeciªton. A key for the identification of all genera is provided. Four new species are described: Labidopullus ashei (Costa Rica, Monteverde; Panama, Cerro Compana, with Labidus coecus); Paramimeciton rettenmeyeri (Ecuador, Limoncocha, with Labidus sp. 1); Mimeciton marianae (Ecuador, Limoncocha, with Labidus sp. 1; and Labidomimus cornutus (Ecuador, Limoncocha, with Labidus coecus). Keys to the species of all genera with more than one species are provided. Most of the genera (10 of 14) are included in a cladistic analysis based on 21 characters. The analysis provided 1 cladogram of 52 steps. The 4 excluded genera were placed into the diagram as incertae sedis. We consider the modified tree as the best estimate of the evolution of the tribe and it is also the basis of its classification. The tribe is thus divided into 4 subtribes: Labidopullina, Leptanillophilina, Mimecitina, and Mimonillina. The Mimecitina is comprised of 2 groups, the Paramimeciton group with 2 subgroups, Paramimeciton and Labidoglobus subgroups, and the Mimeciton group. The relationships of the genera of this tribe of myrmecophiles indicate that both Neivamyrmexand Nomamyrmex evolved from a stock similar to Labidus. The data are insufficient to indicate whether Neivamyrmex or Nomamyrmex came from Labidus-like ancestors first. Behavioral observations by Akre & Rettenmeyer (1966) are reviewed. These indicate that members of this tribe are nest guests rather than hunting guests. This conclusion is strengthened by the lack of correlation of the color of these myrmecophiles with the color of their hosts. The presence of spatulate setae on the tibias and tarsi of all genera adequately observed should indicate that they are all phoretic on ants, their larvae, and/or their booty. Both genera of the subtribe Mimonillina have modified apical abdominal segments which are involved with a unique defensive reaction and possible secretion described by Akre & Rettenmeyer (1966).

ISSN:
0361-6525.

Location:
Biblioteca OET: S10250.

Complete Text Online:
Non available

Compiled by: Organization for Tropical Studies