Cerapachys

Brown, W. L., 1975, Contributions toward a reclassification of the Formicidae. V. Ponerinae, tribes Platythyreini, Cerapachyini, Cylindromyrmecini, Acanthostichini, and Aenictogitini., Search: Agriculture; Cornell University Agricultural Experiment Station 15, pp. 1-115 : 18-22

publication ID

6751

DOI

https://doi.org/10.5281/zenodo.6284629

persistent identifier

https://treatment.plazi.org/id/E3CE2AAC-10F6-BB3F-E218-1536DF2C3D66

treatment provided by

Christiana

scientific name

Cerapachys
status

 

Cerapachys View in CoL   HNS

> Cerapachys   HNS F. Smith, 1857: 74, [[ worker ]]. Type: Cerapachys antennatus   HNS , monobasic.

> Cerapachys   HNS : Emery, 1902: 24, subgeneric classification and relationships, new spp. described. ----- 1911: 8, diagnosis and subdivision into subgenera, species list.

> Cerapachys   HNS : Arnold, 1915: 11 - 17, S African spp., key and diagnoses.

> Cerapachys   HNS : Mann, 1921: 408, key to workers of Fijian spp.

> Cerapachys   HNS : Borgmeier, 1957: 107, discussion of subgenera, with doubts expressed about their validity; New World spp. listed; Cerapachys   HNS neuter in gender after Follett, 1955: 10.

> Cerapachys   HNS : Wilson, 1959: 39 - 57, discussion, description, list of spp. and key to spp., Melanesia.

> Cerapachys   HNS : Kempf, 1972: 76, list of neotropical species; Syscia   HNS and Parasyscia   HNS synonymized on p. 7.

> Ceratopachys Schultz   HNS , 1906, Spolia Hymenopt., p. 155, invalid emendation of Cerapachys   HNS .

> Syscia   HNS Roger, 1861: 19. Type: Syscia   HNS typhla, monobasic. Synonymized with Cerapachys   HNS , Kempf, 1972: 7.

> Cerapachys   HNS subgenus Syscia   HNS : Wilson, 1959: 39, 44 - 45, 51 - 52, 54 - 55, Melanesian species, with keys.

> Syscia   HNS : Wilson and Taylor, 1967: 33, Polynesian sp., species synonymy.

> Ooceraea Roger   HNS , 1862: 248. Type: Ooceraea fragosa   HNS , monobasic. Synonym of Cerapachys   HNS , teste Brown, 1973: 183.

> Cerapachys   HNS subgenus Ooceraea   HNS : Emery, 1902: 24. ----- 1911: 10, [[ worker ]], diagnosis, species list.

> Lioponera Mayr, 1878: 666. Type: Lioponera longitarsus   HNS , monobasic. Synonym of Cerapachys   HNS , teste Brown, 1973: 181.

> Lioponera   HNS : Emery, 1911: 11 - 12, [[ worker ]] [[ queen ]] [[ male ]].

> Lioponera   HNS : Donisthorpe, 1939: 252 - 257, review and species list.

-> Parasyscia   HNS Emery, 1882: 235. Type: Parasyscia piochardi   HNS , monobasic. Synonymized with Cerapachys   HNS in Kempf, 1972: 7.

> Cerapachys   HNS subgenus Parasyscia   HNS : Forel, 1892: 343.

> Cerapachys   HNS subgenus Parasyscia   HNS : Emery, 1902: 22 - 24. ----- 1911: 9, ??, diagnosis, species list.

> Phyracaces   HNS Emery, 1902: 23. Type: Cerapachys mayri   HNS , by original designation. ----- 1911: 10 - 11, pl. 1, fig. 3, [[ worker ]] [[ queen ]], diagnosis, species list. Synonym of Lioponera   HNS , teste Brown and Taylor, 1970: 957 - 958; synonym of Cerapachys   HNS , teste Brown, 1973: 181.

> Phyracaces   HNS : Arnold, 1915: 17 - 19, S. African species.

> Phyracaces   HNS : Wheeler, 1918: 215 - 216, discussion of affinities, etc.; 220 - 223, generic characters, distribution, ethology; 239 - 263, figs. 7 - 17, descriptions, review and key to species of Australia. ----- 1922: 22.

> Phyracaces   HNS : Clark, 1923: 73, 78 - 89, normal and ergatoid queens, larvae, pupae; 7 spp. described from SW Australia. ----- 1924: 75 - 89, pl. 6 - 7,

[[ queen ]] [[ male ]] biology, 8 Australian species described. ----- 1930: 3 - 6, 3 Australian spp. described. ----- 1934: 22 - 27, 6 Australian spp. described. ----- 1941: 71, 74 - 76, 2 Australian spp. described.

> Phyracaces   HNS : Wilson, 1959: 55 - 56, keys and lists, New Guinea and New Caledonia spp.

> Cerapachys   HNS subgenus Phyracaces   HNS : Forel, 1902: 405, 407. ----- 1915: 18 - 21, 3 Australian spp. described.

> Cerapachys   HNS subgenus Cysias Emery, 1902: 24. Type: Ooceraea   HNS papuana   HNS , by original designation. Synonymized with Cerapachys   HNS subgenus Syscia   HNS by Emery, 1911: 10.

> Procerapachys   HNS Wheeler, 1914: 27 - 28. Type: Procerapachys annosus   HNS , by original designation. (Fossil in Baltic Amber.) New synonym.

> Chrysapace Crawley   HNS , 1924: 380 - 383, " apterous female, " recte [[ worker ]] or ergatoid [[ queen ]]. Type: Chrysapace jacobsoni   HNS , by original description, monobasic. Synonym of Cerapachys   HNS , teste Brown, 1973: 179.

> Cerapachys   HNS subgenus Chrysapace   HNS : Wheeler, 1924: 225.

> Neophyracaces   HNS Clark, 1941: 71, 76. Type: Phyracaces clarus   HNS , by original designation. Synonym of Cerapachys   HNS , teste Brown, 1973: 183.

There has been a good deal of confusion about the gender of the name Cerapachys   HNS . Actually, words in Greek for " horn " containing the stem equivalent of ker- occur in all 3 genders, masculine, feminine and neuter. Keras is the neuter form, and heros   HNS is the masculine form. When Smith named the genus, he seems to have been a bit careless in using an " a " instead of an " o " for the fourth letter, but his original employment of the name as masculine is clear from the masculine ending given to the name of the type species (antennatus) in adjectival form. Thus, there seems to be little room for argument, other theories (Borgmeier 1957) notwithstanding, and we should regard Cerapachys   HNS as masculine.

Worker: With characters of tribe. Postpetiolar segment (true abdominal segment III) strongly constricted from body of gaster and varying greatly from species to species in size relative to petiole and to true abdominal segment IV, which always is the largest gastric segment. In the more extreme forms of the fragosus   HNS and edentatus   HNS groups, the petiole and postpetiole form 2 nodes that are small in comparison to segment IV, which covers and forms most of the gaster as in most Myrmicinae   HNS . (Compare figs. 91 and 95). No strong constriction between principal gastric segments.

Antennae 9 - 12 segmented, often with a swollen apical segment. Palpi segmented 4,3 to 2,2. Compound eyes varying from large and multifacetted to completely absent. Ocelli present in workers in a minority of species.

Tibial spurs on middle legs; tarsal claws simple or with a submedian tooth.

Queen: Usually winged, but sometimes wingless and ergatoid, always with compound eyes present so far as known, though they may be very small. Characters otherwise as in the worker of the same species, but body usually a little broader, segment for segment. Wings, when present, like those of male.

Male: See characterization under tribe Cerapachyini   HNS (p. 15). So far as known, the male of Cerapachys   HNS always has 13 - merous antennae and apical spurs on the midtibiae, and the mandibles are triangular, though often with acute apex and concave masticatory border. A sampling of genital capsules is shown in figs. 123 - 126, and subgenital plates in figs. 115, 116, 118, and 122.

In the discussion that follows, I shall show that the synonymy of Cerapachys   HNS extends very widely — much more widely, in fact, than I would have believed before I began this study. Nevertheless, all but one of the generic or subgeneric names here listed as synonyms of Cerapachys   HNS were based on species originally included in Cerapachys   HNS , or early assigned to Cerapachys   HNS s. lat. by Emery or Forel. Thus in a sense we are returning to an earlier generic concept.

The 4 subgenera of Cerapachys   HNS were based primarily on the number of antennal segments, thus: Cerapachys   HNS s. str., 12 segments; Parasyscia   HNS , 11; Ooceraea   HNS , 10; and Syscia   HNS , 9. The subgenus Cysias   HNS had already been synonymized under Syscia   HNS by Emery (1911: 10).

The series Cerapachys   HNS s. str. — Syscia   HNS formed a rough morphocline, not only in the decline of antennal segment number from 12 to 9, but also in the loss of eyes in the worker, and in the reduction of the postpetiolar segment and relative increase in dominance of the succeeding (first gastric) segment. The most extreme result of these trends is seen in such Syscia   HNS species as edentatus   HNS and biroi   HNS , in which the petiole and postpetiole are similar in size, and the succeeding segment, true abdominal tergum IV, is enlarged to cover most of the gastric dorsum (fig. 95). This arrangement is formally like that of the subfamily Myrmicinae   HNS , and clearly represents a convergence to the myrmicine condition. It also renders very difficult the use of " waist " characters for the separation of formicid subfamilies in classifications and keys, especially when one has to distinguish certain army ants with 2 - segmented waists from cerapachyines and myrmicines.

While the general morphocline in species-groups of Cerapachys   HNS involves reductions in both eye size (ommatidial count) and antennomere number, the reductions do not occur with complete concordance. Undescribed species with 12 antennomeres and dot-like eyes in the worker have been found in Africa and Asia, and in these same two continents we have large-eyed species (e. g., nitidulus   HNS ) with 11 antennomeres. C. kodecorum   HNS new species from southeastern Kalimantan (Borneo) usually has 11 segments in the worker, but one worker from the same series has 7 or even only 6 abnormally thick segments in the funiculus. Who is to say really what is normal and abnormal in antennal segmentation in this genus?

In some 11 - segmented species, the basalmost ring segments are often exceedingly short and indistinct, especially the first segment after the pedicel. This segment may even be largely hidden inside the pedicel, and may be partly fused with the succeeding segment (funiculus III). I believe that subgenus Ooceraea   HNS , based on 2 supposedly decamerous species, is actually cryptically 11 - merous. At least, the type and other specimens of 0. fragosus   HNS [65] seem to me to be obscurely 11 - merous, but when the ambiguities of counting and of determining which segments are fused or partly fused become this great, antennal segment number has weakened taxonomic value. Borgmeier (1957: 107), and after him Kempf (1972: 7), apparently hold the same opinion. C. fragosus   HNS and relatives from Asia, described and undescribed, are so much like the 9 - segmented C. typhlus   HNS group (" subgenus Syscia   HNS ") in body form, sculpture, and postpetiolar-gastric proportions that it seems absurd to recognize Syscia   HNS merely on the flimsy antennal segment character.

The main characters supposed to separate Phyracaces   HNS and Lioponera   HNS from Cerapachys   HNS are the proportions of the segments near the end of the antenna, and the shape of the petiolar node. In Cerapachys   HNS , the apical antennomere is usually very long and thick, even egg-shaped, and can be said to form a club of a single segment. While there can be no denying that many species fit the Cerapachys   HNS antennal pattern, others do so less well. The antennatus group (including antennatus, type species of Cerapachys   HNS ), for example, shows wide variation in this character, tending to bridge the gap between the Cerapachys   HNS condition, with a very thick apical segment, and the Phyracaces   HNS condition, in which the apical segment is little or not at all thicker than the penultimate segment.

The 5 - merous club cited as a character of Lioponera   HNS seems to me completely ambiguous, as already discussed above. We also have such " bridging " species as C. crawleyi   HNS [24] and C. lividus   HNS [36]. Figures 87 - 90 illustrate the CerapachysLioponera-Phyracaces morphocline for antennal clubbing.

The character involving the petiolar node really boils down to whether the node is margined on the sides above. Phyracaces   HNS species usually have strong dorsolateral margins on petiole and trunk, and the margination often extends to the postpetiole and even, in a few Australian species, to the head behind the eyes. Thus one finds a morphocline for strength and extent of margination along the body axis within Phyracaces   HNS , and this morphocline stretches of course into Lioponera   HNS (C longitarsus group), which has only the petiolar node laterally marginate. Here again the antennatus complex of forms provides a bridge between Cerapachys   HNS and Phyracaces   HNS , because in this complex, the petiole can be more or less Phyracaces-like or Cerapachyslike in different-sized individuals of the same nest series. I have pointed out in the discussion of this group [25] that one species was originally described as " Phyracaces vandermeermohri   HNS " which illustrates the ambiguity of the generic lines here. In addition to the antennatus group, we have the annectant forms crawleyi   HNS [24], pruinosus   HNS [60], and lividus   HNS [36]. Had the last-named species been earlier described from Australia instead of Madagascar, I believe it would have been put into Phyracaces   HNS rather than Cerapachys   HNS .

The ambiguity of the margination as a generic character is also demonstrated in the descriptions of such species as Phyracaces pygmaeus   HNS and P. aberrans   HNS [33, 47] (Clark, 1934: 25 - 27) and P. braytoni   HNS (Weber, 1949: 3). I have examined the type of P. braytoni   HNS [34], and find it to be a member of the same species-group as Lioponera longitarsus   HNS , type species of that genus, and P. pygmaeus   HNS is actually a synonym of longitarsus   HNS . R. W. Taylor recognized independently (personal communication) that Lioponera   HNS was nothing more than an indistinct species-group within Phyracaces   HNS , and we accordingly tacitly synonymized the latter in our contribution to " The Insects of Australia " (Brown and Taylor, 1970). The name Lioponera   HNS , being older, or course then took priority over Phyracaces   HNS . The members of the longitarsus   HNS group are, so far as we know, arboreal or subarboreal dwellers in hollow twigs and perhaps other tubular cavities in wood or bark, a microhabitat in consonance with the workers' slender, cylindrical body build and large compound eyes. I assume that they prey on ants of other species occupying similar habitats, but there is no real information available on their feeding habits. Both Lioponera   HNS and Phyracaces   HNS axe treated as synonyms of Cerapachys   HNS in Brown (1973: 181).

Clark (1941) raised a genus Neophyracaces   HNS for a group of Australian species in which the workers normally possess ocelli. Most of these species are relatively large in size and prevailingly bright orange or reddish ferruginous in color, and they seem especially well adapted to xeric conditions. Otherwise, they conform to the " typical " Phyracaces   HNS pattern, with strongly developed margination of the trunk, petiole, and even the postpetiole. A number of Phyracaces   HNS species in Australia are like them, except that the workers lack ocelli. Elsewhere in the collective genus Cerapachys   HNS — as in the complexes of C. antennatus   HNS [25] and C. fragosus   HNS [65] — the appearance of ocelli is an allometric character within as well as between colony series. Some of the large, ocellate individuals may in fact be functional reproductives (ergatoids), even in species known to possess dealate queens, but at present we have no direct information on this matter. In view of our scanty and largely ambiguous knowledge of ocellar occurrence and function in Cerapachys   HNS s. lat., it does not seem to me that Clark's Neophyracaces   HNS is worthy of recognition as more than a species-group within Cerapachys   HNS . It would be interesting to know whether and to what extent the ocellate workers of this group also function as reproductives.

C. crawleyi   HNS illustrates one method of dealing with annectant species: make it the type of a new genus. This species was originally described by Crawley as Chrysapace jacobsoni   HNS ( Chrysapace   HNS , like Phyracaces   HNS , is an anagram of Cerapachys   HNS ). While the species [24] is aberrant in its own right, it fits fairly comfortably in either Cerapachys   HNS or Phyracaces   HNS as they have been constituted in recent years, and Wheeler (1924) doubted that it was outside of Cerapachys   HNS . However, C crawleyi   HNS has one very primitive character in addition to its striking sculpture: the middle and hind tibiae each have a large and a small apical spur. The evidently related species C. sauteri   HNS has not been examined for the spur character, but if the tibiae in this poorly known Taiwanese species also have 2 spurs each, it may be necessary to resurrect Chrysapace   HNS as a genus.

We still have to account for the genus Simopone   HNS . Although described by Forel in 1891 as a genus, Simopone   HNS was placed as a subgenus of Cerapachys   HNS by its author in the following year, but Emery's 1911 treatment of it as a genus set apart in a special tribe with Cylindromyrmex   HNS tended to obscure the early relationship. Most of the species subsequently described in Simopone   HNS tended to strengthen the concept of a separate genus; the 11 - merous antennae, large, flat eyes, presence of ocelli, and above all, the separated frontal carinae, often framing demiscrobes for the antennae, tended to mark off a presumably arboreal group of species with its own distinctive habitus. However, the central African species grandis   HNS [76] is not so typical, and the fact that it combines traits of Cerapachys   HNS and Phyracaces   HNS with those of more characteristic Simopone   HNS species was obscured by a mediocre original description and by the paucity and isolation of material available for study in collections. The discovery and analysis of another specimen of grandis   HNS [76] permits us now to say that it is such a strong link between Simopone   HNS and Cerapachys   HNS s. lat. that the generic distinction comes into doubt.

Further trouble for this distinction comes in the form of a new species, Simopone conciliatrix   HNS [77], Simopone-like in habitus, but with 12 antennomeres and other details that put it in the category of annectants between Simopone   HNS and Cerapachys   HNS . Of course, there exist species of Cerapachys   HNS with 11 antennomeres (subgenus Parasyscia   HNS ), but, as already discussed, they mostly have the eyes reduced or absent, rather than enlarged as in Simopone   HNS . Thus the 11 - merous condition in Simopone   HNS and Parasyscia   HNS has apparently been considered (by anyone who may have thought about it at all) as convergent. The new 12 - merous species now ties Simopone   HNS back to the more primitive line of Cerapachys   HNS , which (according to Williston's Rule) must have had 12 antennal segments. Williston's Rule may also be invoked in the matter of the maxillary and labial palpi, which in C. grandis   HNS have 6 and 4 segments respectively, but in C. conciliatrix   HNS only 3 and 2. We see here the expression of an interesting tendency in ants as a family to maintain high palpal counts among some epigaeic, and especially arboreal, foragers. In these same lines, however, antennal segments may either be reduced in number, or stay at the primitive number 12.

In the circumstances, my instincts have been to place Simopone   HNS in the synonymy of Cerapachys   HNS as a primitive arboreal group of the latter genus, and this is the way the situation may well be viewed by future revisers. There does, however, remain one character by which the two groups can still be unequivocally separated in at least the workerqueen castes, and that is the tibial spur of the middle leg — present in all Cerapachys   HNS I have examined, and absent in Simopone   HNS . Since the middle-leg spur character is concordant in a rough way with the traditional characters of Simopone   HNS , it seems best to continue to recognize the generic separation, a course that also avoids some awkward specieslevel homonymy that would result if the Simopone   HNS species were thrown into Cerapachys   HNS .

bionomics: Discussed previously under the tribe.

distribution: Cerapachys   HNS as here constituted is by far the largest genus in the tribe, and its geographical range is virtually coextensive with that of tribe Cerapachyini   HNS . The genus is much better represented in the Old World than the New, and the majority of species, both described and undescribed, are in the Indo-Australian region. Forms with laterally marginate petiole (formerly Phyracaces   HNS , Neophyracaces   HNS , and Lioponera   HNS ) are restricted to the Old World, and have radiated especially extensively in Australia, where they occur in semidesert as well as wet and dry forest habitats. The 9 - segmented group ( Syscia   HNS ) is widespread in northern and eastern Australia as one or two species [63], and also has endemic species in New Guinea, the Solomons and Fiji; s. biroi   HNS of this group has become established in Hawaii and even in the West Indies, following probable overseas transport by human commerce. The 9 - segmented species are good colonizers.

It is interesting to note that the " more typical " Cerapachys   HNS — the species with rounded petiole and 12 or 11 antennal segments related to C. dohertyi   HNS and C. cribrinodis   HNS — have not penetrated continental Australia, though they have spread through Melanesia as far eastward as Fiji. This absence may be related to the extraordinary radiation in Australia of Sphinctomyrmex   HNS in the adaptive zones that elsewhere are mainly occupied by Cerapachys   HNS .

In the New World, where Sphinctomyrmex   HNS is known only from a single rare, localized species, Cerapachys   HNS is represented sparsely by a few 11 - segmented species ranging from Sonoran North America southward to Panama; one 11 - segmented species apparently isolated in southeastern Brasil; and one 12 - segmented, minute-eyed species from Trinidad that possibly could be a historic immigrant like C. biroi   HNS , known from the same island. The 11 - merous species from North and Central America appear to be endemic, and number perhaps as many as 5 or 6, counting undescribed samples; these form a tightly knit group of blind or minute-eyed forms related to C. augustae   HNS . It seems likely that Cerapachys   HNS is limited in the New World by competition with myrmecotherous ecitonines such as Neivamyrmex   HNS .

In Africa, Cerapachys   HNS is widely and fairly well represented by a diversity of groups of species with 11 or 12 antennal segments (mainly 12) in habitats ranging from rain forest to arid karroo veld, montane grassland, and Saharan oases and wadis. Although at least one species ( C. piochardi   HNS ) occurs in the Middle East, no cerapachyine is known to reach Europe.

Cerapachys   HNS ranges to the southern shores of Australia and South Africa, and is well represented on Madagascar, but is still unknown from south of Brasil in South America. In Asia, the genus reaches north to the Himalayan wall, central China, and southern Japan.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Formicidae

SubFamily

Ponerinae

Tribe

Cerapachyini

Loc

Cerapachys

Brown, W. L. 1975
1975
Loc

Neophyracaces

Clark 1941
1941
Loc

Chrysapace

Crawley 1924
1924
Loc

Chrysapace jacobsoni

Crawley 1924
1924
Loc

Chrysapace

Crawley 1924
1924
Loc

Procerapachys

Wheeler & W.M. 1915
1915
Loc

Procerapachys annosus

Wheeler & W.M. 1915
1915
Loc

Phyracaces

Emery 1901
1901
Loc

Phyracaces

Emery 1901
1901
Loc

Phyracaces

Emery 1901
1901
Loc

Phyracaces

Emery 1901
1901
Loc

Phyracaces

Emery 1901
1901
Loc

Phyracaces

Emery 1901
1901
Loc

Phyracaces clarus

Emery 1901
1901
Loc

Parasyscia

Emery 1882
1882
Loc

Parasyscia

Emery 1882
1882
Loc

Parasyscia piochardi

Emery 1882
1882
Loc

Parasyscia

Emery 1882
1882
Loc

Parasyscia

Emery 1882
1882
Loc

Lioponera longitarsus

Mayr 1879
1879
Loc

Lioponera

Mayr 1879
1879
Loc

Lioponera

Mayr 1879
1879
Loc

Lioponera

Mayr 1879
1879
Loc

Ooceraea

Roger 1862
1862
Loc

Ooceraea fragosa

Roger 1862
1862
Loc

Ooceraea

Roger 1862
1862
Loc

Ooceraea

Roger 1862
1862
Loc

papuana

Roger 1862
1862
Loc

Syscia

Roger 1861
1861
Loc

Syscia

Roger 1861
1861
Loc

Syscia

Roger 1861
1861
Loc

Syscia

Roger 1861
1861
Loc

Syscia

Roger 1861
1861
Loc

Syscia

Roger 1861
1861
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