Pseudomyrmex mixtecus
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BibTeX: @article{Ward1993JournalofHymenopteraResearch2, RIS/ Endnote: TY - JOUR Wikipedia/ Citizendium: <ref name="Ward1993Journal of Hymenoptera Research2">{{Citation |
Ordo: Hymenoptera
Familia: Formicidae
Genus: Pseudomyrmex
Name
Pseudomyrmex mixtecus Ward, Philip S., 1993 – Wikispecies link – Pensoft Profile
- Pseudomyrmex mixtecus Ward, Philip S., 1993, Journal of Hymenoptera Research 2: 144-144.
Description
(Figs. 15, 26, 55, 61, 69)
Materials Examined
Mexico 25.4 mi. S. Chilpancingo D. H. Janzen Mexico Mexico Mexico Mexico Mexico Mexico Mexico Mexico Mexico Mexico Mexico Mexico Mexico
Description
Worker measurements (n - 13). - HLO.94-1.19, HW 0.89-1.03, MFC 0.054-0.073, Cl 0.86-0.95, REL 0.42-0.47, REL2 0.46-0.52 OOI1.22-2.28, VI 0.61-0.73, FCI0.056-0.073, SI0.43-0.45, SI2 0.86- 0.97, NI 0.60-0.65, PLI 0.60-0.68, PWI 0.60-0.68, PPWI 1.40-1.73.
Diagnosis
Worker diagnosis. - Similar to P. ferrugineus (q.v.) except as follows. Size smaller (HW <1.04, LHT <0.90), head broad (Cl> 0.85); frontal carinae separated by about basal scape width or less (FCI 2 0.45-0.54). Basal and declivitous faces of propodeum forming a less obtuse angle in profile than typical for P. ferrugineus (compare Figs. 26 and 27). Head densely punctulate, opaque. Standing pilosity rather common, usually some setae exceeding 0.12 mm and 0.20 mm in length on mesosoma dorsum and petiole, respectively. Pubescence dense but appressed. Very dark brown to black, appendages lighter.
Discussion
Comments. - P. mixtecus is distinguished from all other species, except P. veneficus and P. flavicomis, by its laterally rounded median clypeal lobe, broad head, and black (or very dark brown) body. It differs from P. veneficus by the fully opaque head, absence of conspicuous suberect pubescence on the petiole, and larger size. P. mixtecus is evidently closely related to P. flavicomis but averages smaller in size (compare worker HW and LHT values), a difference which is absolute in queens (queenHW 0.96-1.01 (n=8), whereas queen HW> 1.11 in P. flavicomis). In addition the petiole is relatively longer and higher, for a given head width, in both workers and queens of P. mixtecus (Figs. 44-47).
Distribution
Distribution and biology. - P. mixtecus is known only from the Mexican states of Guerrero and Oaxaca (Fig. 69). Colonies have been collected from Acacia hindsii and A. collinsii, but little more has been recorded about their biology. Janzen's field notes indicate that this species is monogynous.
Materials Examined
Mexico 10 mi NE Acapulco D. H. Janzen Mexico 29.6 mi N Acapulco D. H. Janzen Mexico 30 mi N Acapulco, Hwy. 95 Cornell Univ. Mex. Field Party Mexico 57.8 mi S Chilpancingo, Hwy. 95 D. H. Janzen Mexico 74 km N Acapulco W. MacKay Mexico Acapulco Baker Mexico Acapulco F. Knab Mexico Acapulco N. L. H. Krauss Mexico Acapulco L. J. Lipovsky Mexico Puerto Marques N. L. H. Krauss Mexico San Geronimo de Juarez W. von Hagen Mexico 11.4 - 17.0 mi W Tehuantepec D. H. Janzen Mexico 13.8 mi W Tehuantepec D. H. Janzen Mexico 19 km N San Pedro Pochutla W. MacKay Mexico 6.0 mi E Niltepec, Hwy. 190 D. H. Janzen
Taxon Treatment
- Ward, Philip S.; 1993: Systematic studies on Pseudomyrmex acacia-ants (Hymenoptera: Formicidae: Pseudomyrmecinae), Journal of Hymenoptera Research 2: 144-144. doi
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