Difference between revisions of "Monomorium tanysum"

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[[:File:Monomorium_tanysum__casent0902239_l_1_high.jpg|Specimen Labels]]
 
[[:File:Monomorium_tanysum__casent0902239_l_1_high.jpg|Specimen Labels]]
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Nothing is known about the biology of ''{{PAGENAME}}''.
  
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==Identification==
 
==Identification==
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Bolton (1987) - The Ghanaian ''tanysum'' is related most closely to the Tanzanian ''[[Monomorium disoriente]]'', the two sharing a very similar outline shape of alitrunk. In ''tanysum'', however, the ventral process of the petiole is shorter and deeper and the postpetiole node higher and narrower than is indicated in ''disoriente''. Apart from this the eyes are distinctly larger in ''disoriente'' (0.24 x HW) and the scapes relatively longer (SI 92). ''M. tanysum'' and ''disoriente'' together are closest to ''[[Monomorium dolatu]]'', a form with only l l-segmented antennae . Overall appearance is very similar in all three but ''dolatu'' has a more strongly tapered petiole node which is very narrowly rounded above, and approaches the distinctly cuneate node form of ''[[Monomorium affabile]]'' and ''[[Monomorium malatu]]''. ''M. dolatu'' is yellow in colour and has the eyes somewhat further forward on the side than either ''tanysum'' or ''disoriente''. In ''affabile'' and ''malatu'' the propodeum is reticulate-punctate everywhere, a condition not present in any of the foregoing species.
  
 
{{Species identification keys}}
 
{{Species identification keys}}
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==Castes==
 
==Castes==
 
  
 
==Nomenclature==
 
==Nomenclature==
 
{{Nomenclature}}
 
{{Nomenclature}}
 
*''<span style='color:red;font-weight:bold;'>tanysum.</span> Monomorium tanysum'' Bolton, 1987: 416 (w.) GHANA.
 
*''<span style='color:red;font-weight:bold;'>tanysum.</span> Monomorium tanysum'' Bolton, 1987: 416 (w.) GHANA.
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{{nomenplus}}
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===Description===
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====Worker====
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Holotype. TL 1.5, HL 0.42, HW 0.34, CI 81, SL 0.30, SI 88, PW 0.22, AL 0.46.
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Clypeal carinae sharply developed and conspicuous, widely separated and subparallel posteriorly, feebly divergent anteriorly. Space between the clypeal carinae flat to shallowly transversely concave. Anterior c1ypeal margin transverse between the apices of the carinae. Anterior and lateral margins of prominent median portion of clypeus separated by blunt obtuse angles, without denticles or projecting acute angles. Clypeal carinae meeting anterior margin medially of the obtuse angles separating the anterior and lateral margins, each carina paralleled externally by a weak rugule which runs back from the angle to the antennal socket. Maximum diameter of eye 0.18 x HW and with 6 ommatidia in the longest row. In full-face view the eyes just in front of the midlength of the sides. Antennal scapes, when laid straight back from their insertions, failing to reach the occipital margin. Sides of head weakly convex in full-face view, slightly convergent both in front of and behind the eyes. Occipital margin with a short shallow median
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indentation. Head in profile distinctly biconvex, deepest at about the midlength. Promesonotum a low domed convexity in profile, highest at its midlength and distinctly on a much higher level than the propodeum. Metanotal groove shallowly impressed but broad, traversed by strong cross-ribs dorsally; laterally the cross-ribs are less distinct and become confused with the strong mesopleural sculpture. Propodeal spiracle small, the propodeal dorsum highest immediately behind the metanotal groove. Posterior to this the outline is almost flat in profile and sloping at about 45° until it rounds into the very short declivity through a blunt angle. In dorsal view the posterior half of the propodeum is almost flat transversely. Petiole in profile with a short anterior peduncle which is subtended by a short but deep anteroventral process. Petiole node high and subconical, narrowly rounded above. Postpetiole lower than petiole , more bluntly rounded above and with its anterior face nearly vertical, distinctly steeper than the posterior face. All dorsal surfaces of head and body with standing hairs, the promesonotum with 5 pairs. Unsculptured except for hair-pits, metanotal cross-ribs and reticulate-punctation on the mesopleuron. Colour brown, the gaster darker than the alitrunk and almost blackish brown.
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Paratype. TL 1.6, HL 0.42, HW 0.38, CI 83, SL 0.30, SI 86, PW 0.22, AL 0.46.
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As holotype but maximum diameter of eye 0.17 x HW and the anterior margin of the prominent median section of the clypeus shallowly concave.
  
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===Type Material===
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Holotype worker, Ghana: Mampong, 17.xi. 1969 (P. Room) ({{BMNH}}). Paratype, 1 worker with same data as holotype (BMNH).
 
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===Description===
 
  
 
==References==
 
==References==
*Bolton, B. 1987. A review of the Solenopsis genus-group and revision of Afrotropical Monomorium Mayr (Hymenoptera: Formicidae). Bull. Br. Mus. (Nat. Hist.) Entomol. 54: 263-452 (page 416, worker described)
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*[[Media:Bolton 1987.pdf|Bolton, B. 1987. A review of the ''Solenopsis'' genus-group and revision of Afrotropical ''Monomorium'' Mayr (Hymenoptera: Formicidae). Bulletin of the British Museum (Natural History). Entomology. 54:263-452. '''PDF]]. (page 416, worker described)
  
 
[[category:Species]]
 
[[category:Species]]
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[[category:Formicidae]][[category:Myrmicinae]][[category:Solenopsidini]][[category:Monomorium]][[category:Monomorium tanysum]]
 
[[category:Formicidae]][[category:Myrmicinae]][[category:Solenopsidini]][[category:Monomorium]][[category:Monomorium tanysum]]
 
[[category:Myrmicinae species]][[category:Solenopsidini species]][[category:Monomorium species|tanysum]]
 
[[category:Myrmicinae species]][[category:Solenopsidini species]][[category:Monomorium species|tanysum]]
[[category:Need Overview]][[category:Need Body Text]]
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[[Category:Ssr]]

Revision as of 19:40, 13 September 2019

Monomorium tanysum
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Solenopsidini
Genus: Monomorium
Species: M. tanysum
Binomial name
Monomorium tanysum
Bolton, 1987

Monomorium tanysum casent0902239 p 1 high.jpg

Monomorium tanysum casent0902239 d 1 high.jpg

Specimen Labels

Nothing is known about the biology of Monomorium tanysum.

Identification

Bolton (1987) - The Ghanaian tanysum is related most closely to the Tanzanian Monomorium disoriente, the two sharing a very similar outline shape of alitrunk. In tanysum, however, the ventral process of the petiole is shorter and deeper and the postpetiole node higher and narrower than is indicated in disoriente. Apart from this the eyes are distinctly larger in disoriente (0.24 x HW) and the scapes relatively longer (SI 92). M. tanysum and disoriente together are closest to Monomorium dolatu, a form with only l l-segmented antennae . Overall appearance is very similar in all three but dolatu has a more strongly tapered petiole node which is very narrowly rounded above, and approaches the distinctly cuneate node form of Monomorium affabile and Monomorium malatu. M. dolatu is yellow in colour and has the eyes somewhat further forward on the side than either tanysum or disoriente. In affabile and malatu the propodeum is reticulate-punctate everywhere, a condition not present in any of the foregoing species.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Afrotropical Region: Ghana (type locality).


Distribution based on AntMaps

AntMapLegend.png

Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Nomenclature

The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • tanysum. Monomorium tanysum Bolton, 1987: 416 (w.) GHANA.

Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.

Description

Worker

Holotype. TL 1.5, HL 0.42, HW 0.34, CI 81, SL 0.30, SI 88, PW 0.22, AL 0.46.

Clypeal carinae sharply developed and conspicuous, widely separated and subparallel posteriorly, feebly divergent anteriorly. Space between the clypeal carinae flat to shallowly transversely concave. Anterior c1ypeal margin transverse between the apices of the carinae. Anterior and lateral margins of prominent median portion of clypeus separated by blunt obtuse angles, without denticles or projecting acute angles. Clypeal carinae meeting anterior margin medially of the obtuse angles separating the anterior and lateral margins, each carina paralleled externally by a weak rugule which runs back from the angle to the antennal socket. Maximum diameter of eye 0.18 x HW and with 6 ommatidia in the longest row. In full-face view the eyes just in front of the midlength of the sides. Antennal scapes, when laid straight back from their insertions, failing to reach the occipital margin. Sides of head weakly convex in full-face view, slightly convergent both in front of and behind the eyes. Occipital margin with a short shallow median indentation. Head in profile distinctly biconvex, deepest at about the midlength. Promesonotum a low domed convexity in profile, highest at its midlength and distinctly on a much higher level than the propodeum. Metanotal groove shallowly impressed but broad, traversed by strong cross-ribs dorsally; laterally the cross-ribs are less distinct and become confused with the strong mesopleural sculpture. Propodeal spiracle small, the propodeal dorsum highest immediately behind the metanotal groove. Posterior to this the outline is almost flat in profile and sloping at about 45° until it rounds into the very short declivity through a blunt angle. In dorsal view the posterior half of the propodeum is almost flat transversely. Petiole in profile with a short anterior peduncle which is subtended by a short but deep anteroventral process. Petiole node high and subconical, narrowly rounded above. Postpetiole lower than petiole , more bluntly rounded above and with its anterior face nearly vertical, distinctly steeper than the posterior face. All dorsal surfaces of head and body with standing hairs, the promesonotum with 5 pairs. Unsculptured except for hair-pits, metanotal cross-ribs and reticulate-punctation on the mesopleuron. Colour brown, the gaster darker than the alitrunk and almost blackish brown.

Paratype. TL 1.6, HL 0.42, HW 0.38, CI 83, SL 0.30, SI 86, PW 0.22, AL 0.46.

As holotype but maximum diameter of eye 0.17 x HW and the anterior margin of the prominent median section of the clypeus shallowly concave.

Type Material

Holotype worker, Ghana: Mampong, 17.xi. 1969 (P. Room) (The Natural History Museum). Paratype, 1 worker with same data as holotype (BMNH).

References