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Species: Crematogaster moelleri   Forel, 1912 

Classification:
Download Data

Taxonomic History (provided by Barry Bolton, 2019)

Crematogaster brevispinosa r. moelleri Forel, 1912g PDF: 214 (w.m.) BRAZIL. Neotropic. AntCat AntWiki HOL

Taxonomic history

Raised to species: Longino, 2003A PDF: 86.

Distribution:

  Geographic regions (According to curated Geolocale/Taxon lists):
    Americas: Argentina, Brazil, Costa Rica
  Biogeographic regions (According to curated Bioregion/Taxon lists):
    Neotropical

Taxonomic Treatment (provided by Plazi)

Treatment Citation: Longino, J. T., 2003, The Crematogaster (Hymenoptera, Formicidae, Myrmicinae) of Costa Rica., Zootaxa 151, pp. 1-150

Crematogaster moelleriHNS NEW STATUS

Crematogaster brevispinosa r. moelleri ForelHNS, 1912:214. Syntype worker, male: Brazil, Santa Catarina, Blumenau ( Möller) [MHNG] (examined). Emery, 1922:134; Santschi, 1923:250: combination in C. (Orthocrema)HNS.

Range

Costa Rica, Brazil (Santa Catarina).

Description of worker

Color red brown, gaster darker.

In face view head subquadrate, about as wide as long, with emarginate posterior margin; mandibles shiny, smooth or with faint striae; clypeus convex, smooth and shiny; scapes falling short or just attaining posterior margin of head when laid back from insertions; terminal three to four segments of antenna gradually lengthening and broadening, becoming increasingly densely pubescent, terminal two segments very much larger than proximal segments, so that antennal club appears two-segmented; scapes with abundant long subdecumbent to suberect pubescence, with no differentiated long erect setae; face with abundant long subdecumbent to suberect pubescence, 1-5 medium length filiform erect setae on face posterior to frontal carinae; malar spaces and space between eyes and antennal insertions with fine longitudinal striae, rest of face smooth and shining.

Promesonotal profile forming a single convexity, mesonotum slightly elevated posteriorly, dropping abruptly to propodeal suture (not elevated, sloping gradually to suture in Braulio Carrillo worker); propodeal suture deep in dorsal view but not visible in lateral view due to lateral carinulae that bridge the suture, these carinulae with small denticle (carinulae reduced and lacking denticle on Braulio Carrillo worker, such that propodeal suture more v-shaped in lateral view); dorsal and posterior faces of propodeum in same plane, sloping from propodeal suture to petiolar insertion, anterior half of face faintly and irregularly punctatorugose, becoming smooth and concave posteriorly; propodeal spines upturned, medium length, narrowly acute and spiniform; promesonotal dorsum with weak sculpture, usually with more or less longitudinally oriented rugulae or striae, interspaces smooth and shining; side of pronotum faintly striate anteriorly, becoming smooth and shining posteriorly; katepisternum punctatorugose (punctate on Braulio Carrillo specimen), sublucid; side of propodeum faintly longitudinally striate or etched ventrally, smooth dorsally; promesonotal dorsum with 7-11 medium length flexuous setae, those on pronotal humeri longest; anterodorsal propodeum with 0-1 erect flexuous setae; femora and tibiae with abundant subdecumbent pubescence, no erect setae.

Petiole in lateral view subtrapezoidal, sublucid, with faint microsculpture; anteroventral petiolar tooth strongly developed, triangular, acute, with blunt tip (tooth smaller on Braulio Carrillo worker); dorsal face of propodeum smooth and shiny, subquadrate, about as wide as long, sides flat to somewhat convex, widest point of petiole about midlength; posterolateral tubercles each with an erect posteriorly directed seta; postpetiole with small sharp ventral denticle (lacking on Braulio Carrillo worker), globular to subquadrate in dorsal view, about as long as wide, posterior margin rounded to emarginate, with 2-8 erect setae; fourth abdominal tergite smooth and shining, with sparse subdecumbent to suberect pubescence and abundant long erect setae that are evenly distributed across tergite, erect setae stiffer than those on mesosoma.

Measurements

HL 0.908, 0.702, 0.921; HW 0.996, 0.812, 1.031; HC 0.933, 0.738, 0.989; SL 0.710, 0.570, 0.709; EL 0.174, 0.172, 0.170; A11L 0.303; A11W 0.136; A10L 0.125; A10W 0.120; A09L 0.082; A09W 0.090; A08L 0.074; A08W 0.078; WL 0.993, 0.786, 1.038; SPL 0.138, 0.102, 0.153; PTH 0.208, 0.179, 0.224; PTL 0.243, 0.180, 0.266; PTW 0.238, 0.196, 0.209; PPL 0.201, 0.161, 0.229; PPW 0.233, 0.203, 0.255; CI 110, 116, 112; OI 19, 25, 18; SI 78, 81, 77; PTHI 86, 99, 84; PTWI 98, 109, 79; PPI 116, 126, 111; SPI 14, 13, 15; ACI 0.75.

Queen (Costa Rica)

A normal queen (dorsal face of propodeum drops steeply from postscutellum and much of propodeum appears ventral to scutellum and postscutellum, Fig. 1) with general shape, sculpture, and pilosity characters of the worker; size characters as in Figures 4 and 5.

Biology

Crematogaster moelleriHNS inhabits montane moist to wet forest habitats in Costa Rica. It is known from few collections. In the Monteverde community area, near the continental divide in the Cordillera de Tilarán, I observed workers foraging on a tree trunk in a garden area. Suzanne Koptur collected workers twice from extrafloral nectaries of Inga trees. At 1000m elevation on the Atlantic slope of the Cordillera Volcanica Central, in the Zona Protectora of Braulio Carrillo National Park, the ALAS project collected workers in one Malaise trap and an alate queen in another.

Comments

This species shares most of the characters of crinosaHNS relatives (face with sparse erect setae over short appressed pubescence, sparse erect setae on mesosomal dorsum, short upturned propodeal spines) but differs in the presence of long flexuous rather than short stiff setae on the mesosomal dorsum. Similar Costa Rican species are crinosaHNS, torosaHNS, rochaiHNS, and erectaHNS. The flexuous dorsal setae differentiate it from the first three. Crematogaster erectaHNS has flexuous setae on the pronotal humeri but the other dorsal setae are short and stiff. Also, erectaHNS has a general habitus difference: the propodeal spines are a bit thinner and longer and the size polymorphism less pronounced.

When I observed moelleriHNS in the field in Monteverde it looked and acted like typical crinosaHNS group species such as crinosaHNS or torosaHNS, but workers moved very slowly. I noted at the time that it was odd to see a crinosaHNS group colony at an elevation as high as Monteverde, where I had never seen crinosaHNS group species before. I assumed it was torosaHNS or one of the other common species at the upper edge of its elevational range, but on laboratory examination I was surprised to find a morphologically distinct form. The additional Koptur samples from Monteverde and the ALAS collections from another montane site reinforced its distinctness from lowland forms. Thus it appears to be a low density species that occurs in a narrow elevational band, in wet to moist forests just above the typical range of the abundant lowland forms in the crinosaHNS group.

I examined the MHNG syntypes of moelleriHNS long before seeing the Costa Rican material, and made these notes: "This series is similar to crinosaHNS but has erectaHNS tendencies. The pilosity is very like erectaHNS, with long flexuous hairs on head and humeri, hairs on fourth abdominal tergite long but stiff, underlying pubescence long and suberect. The scapes are relatively short, like crinosaHNS, failing to reach vertex margin. The propodeal spine is short and upturned, more like crinosaHNS than erectaHNS. Strong petiolar tooth. Variable in size (more like crinosaHNS) and red-brown color (fading due to age, or more reddish in life?). There are the faintest traces of metanotal tooth where the carinae extend onto propodeum (also present on some crinosaHNS.) Overall, most like a very hairy crinosaHNS." This matches closely the above description from Costa Rican material. It remains to be seen whether the concordance in morphology represents convergence due to shared environmental conditions or shared phylogenetic history.

Specimen Habitat Summary

Found most commonly in these habitats: 7 times found in montane wet forest, 3 times found in cloud forest, 1 times found in oak cloud forest, 2 times found in wet forest, 1 times found in mature moist forest, 1 times found in moist forest edge, 1 times found in tropical moist forest.

Found most commonly in these microhabitats: 1 times on Inga oerstediana, 1 times in hollow stem, 2 times pan trap, 2 times beating veg., 1 times on Inga punctata, 1 times Nest in einem A ? von Prosopis die gange einer Cerambyciden=larve ?, 1 times farmland, 1 times ex sifted litter, 1 times bajo de M/18, 1 times alate during day.

Collected most commonly using these methods: 5 times search, 5 times Malaise, 2 times beating, 2 times Pan Trap, 1 times Winkler, 1 times flight intercept trap, 1 times sweep net.

Elevations: collected from 1000 - 2070 meters, 1498 meters average

Type specimens: moelleri syntype: jtl028024; syntype of Crematogaster moelleri: casent0908399; Type of unavailable quadrinomial: Crematogaster brevispinosa moelleri tucumanensis: casent0908400



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