Research Article |
Corresponding author: Wayne P. Maddison ( wmaddisn@mail.ubc.ca ) Academic editor: Jeremy Miller
© 2019 Wayne P. Maddison, Tamás Szűts.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Maddison WP, Szűts T (2019) Myrmarachnine jumping spiders of the new subtribe Levieina from Papua New Guinea (Araneae, Salticidae, Myrmarachnini). ZooKeys 842: 85-112. https://doi.org/10.3897/zookeys.842.32970
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A previously unreported radiation of myrmarachnine jumping spiders from New Guinea is described, which, although having few known species, is remarkably diverse in body forms. This clade is the new subtribe Levieina, represented by seven new species in three new genera. Within Leviea gen. n. are three new species, L. herberti sp. n., L. lornae sp. n., and L. francesae sp. n., all of which are unusual among the myrmarachnines in appearing as typical salticids, not antlike. Papuamyr gen. n. superficially resembles Ligonipes Karsch, 1878 or Rhombonotus L. Koch, 1879 as a compact antlike spider, but lacks their laterally-compressed palp and bears an ectal spur on the paturon of the chelicera. Two species of Papuamyr gen. n. are described, Papuamyr omhifosga sp. n. and P. pandora sp. n. Agorioides gen. n., containing A. cherubino sp. n. and A. papagena sp. n., is antlike, with the carapace sunken inwards (concave) between the posterior lateral and posterior median eyes. Phylogenetic analysis of data from the 28S, 16SND1, and COI gene regions of 29 species of myrmarachnines shows that the three new genera form a clade that is sister to the subtribe Myrmarachnina (Myrmarachne sensu lato), with the subtribe Ligonipedina less closely related.
Ant mimicry, Astioida, molecular phylogeny, new genus, new species, Salticinae, Salticoida, taxonomy
The diverse and exquisitely antlike mymarachnine jumping spiders are found around the world, with hundreds of species in the Old World and a few in the Neotropics (
Accordingly, it is unsurprising that several distinctive new lineages of myrmarachnines have been found in New Guinea. We describe them here as three new genera, one of which (Leviea gen. n.) is unusual among myrmarachnines for being not in the least antlike. Even though the new levieines have body forms distinctive from other myrmarachnines, general body form is not necessarily a good clue to relationships in myrmarachnines because of their strong selective pressures for mimicry (
This paper began as a presentation in a symposium honouring Herbert W Levi in the 20th International Congress of Arachnology (2016). Accordingly, it is dedicated to Levi and his service to arachnology. All of the specific epithets make reference to him and his family.
The bulk of the material examined came from two expeditions to Papua New Guinea, one in 2008 (
Specimens were examined under both dissecting microscopes (Nikon S800, Olympus SZ61) and compound microscopes (Nikon ME600L, Nikon Eclipse E200) with reflected light. Drawings were made with a drawing tube on a Nikon ME600L compound microscope.
Terminology is standard for Araneae. All measurements are given in millimeters. Carapace length was measured from the base of the anterior median eyes not including the lenses to the rear margin of the carapace medially; abdomen length to the end of the anal tubercle. The following abbreviations are used: PLE, posterior lateral eyes; PME, posterior median eyes (the “small eyes”); RTA, retrolateral tibial apophysis.
Taxa included in the molecular phylogeny are listed in Table
New DNA sequences of the genes or gene regions 28S, 16SND1, and COI were obtained using the protocols of
Sequences obtained are deposited in GenBank (Table
Specimens used for molecular phylogeny, with Genbank accession codes (*=previously published). Second column lists source publication as Citation:Voucher specimen, with citation codes: BM2012:
Citation: voucher specimen | 28S | 16SND1 | CO1 | |
---|---|---|---|---|
Non-astioid outgroups | ||||
Afromarengo sp. | BM2012:MRB262 | JX145758* | JX145905* | JX145682* |
Bavia aff. aericeps Simon, 1877 | M+2008,M+2014:d079 | EU815490* | KM032925* | EU815603* |
Dendryphantes hastatus (Clerck, 1757) | M+2007,M+2014:d043 | EF201646* | KM032927* | KM033228* |
Evarcha proszynskii Marusik & Logunov, 1998 | MH2003:S232; BM2012:d096 | DQ665765* | DQ665723* | AY297379* |
Idastrandia cf. orientalis (Szombathy, 1915) | M+2008:d108 | EU815535/ EU815496* | EU815560* | EU815608* |
Omoedus orbiculatus (Keyserling, 1881) | BM2012:JXZ136; ZM2013:JXZ088 | JX145762* | KC616047* | KC615792* |
Astioid outgroups | ||||
Apricia jovialis (L. Koch, 1879) | M+2008:d021 | EU815472* | EU815544* | EU815588* |
Arasia mollicoma (L. Koch, 1880) | M+2008:d046 | EU815483* | EU815550* | EU815598* |
Helpis minitabunda (L. Koch, 1880) | MH2003:S194/S195; M+2014:d265 | AY297282* | AY296700*/AY297345* | KM033227* |
Heratemita alboplagiata (Simon, 1899) | MH2003:S266 | AF327934* | AF327962*/AF328021* | AF327991* |
Neon nelli Peckham & Peckham, 1888 | MH2003:S310 | AF327931* | AF327959*/AF328018* | AF327988* |
Nungia epigynalis Żabka, 1985 | M+2014:d221 | KM033192* | KM032924* | |
Orthrus bicolor Simon, 1900 | MH2003:S192 | AY297286* | AY296704*/AY297349* | AY297413* |
Papuaneon tualapa Maddison, 2016 | M2016:d302/JXZ267 | KY200845* | KY200842* | |
Penionomus sp. [New Caledonia] | M+2008:d122 | EU815498* | EU815561* | EU815610* |
Sandalodes bipenicillatus (Keyserling, 1882) | M+2008:d019 | EU815471* | EU815587* | |
Trite planiceps Simon, 1899 | MH2003:S197 | AY297290* | AY296708*/AY297353* | AY297417* |
Viciria praemandibularis (Hasselt, 1893) | BM2012:d183 | JX145757* | JX145904* | |
Ligonipedina | ||||
Ligonipes sp. 1 [Australia] | M+2008:d048 | EU815484* | EU815551* | EU815599* |
Rhombonotus cf. gracilis L. Koch, 1879 [Australia] | This:GLR16-26 | MK716310 | MK716304 | |
Levieina | ||||
Agorioides papagena sp. n. | This:d253 | MK716311 | MK716305 | |
Leviea francesae sp. n. | This:d254 | MK716312 | MK716306 | |
Papuamyr omhifosga sp. n. | This:d267 | MK716313 | ||
Myrmarachnina | ||||
Belippo cf. ibadan Wanless, 1978 | BM2012,M2016:MRB118 | JX145748* | KY200840* | JX145674* |
Emertonius malayanus Edmunds & Prószyński, 2003 | Y+2018:TYMLY02; This:SWK12-1851 | MK716314 | MK716307 | LC193966* |
Myrmage aff. gedongensis (Badcock, 1918) | BM2012:MRB117 | JX145750* | JX145899* | JX145676* |
Myrmapana cf. mocamboensis (Galiano, 1974) | This:MRB152 | MK716315 | MK716308 | |
Myrmaplata plataleoides (O. P.-Cambridge, 1869) | BM2012:MRB114 | JX145754* | JX145902* | JX145680* |
Myrmarachne assimilis Banks, 1930 | MH2003:S149 | AY297284* | AY296702*/AY297347* | AY297412* |
Myrmarachne aurea Ceccarelli, 2010 | CC2007: sp. B type 1 | DQ373010* | DQ372996* | |
Myrmarachne bicolor (L. Koch, 1879) | P+2017:Myrm15 | KT364840* | ||
Myrmarachne cornuta Badcock, 1918 | M+2015:PK373; This:SWK12-3302 |
MK716316 | MK716309 | KP978509* |
Myrmarachne erythrocephala (L. Koch, 1879) | P+2017:Myrm33 | KT364853* | KT364810* | |
Myrmarachne evidens Roewer, 1965 | BM2012:MRB249 | JX145752* | JX145678* | |
Myrmarachne foenisex Simon, 1910 | BM2012:MRB254 | JX145753* | JX145901* | JX145679* |
Myrmarachne gurgulla Ceccarelli, 2010 | CC2007: sp. D type 1 | DQ373013* | DQ372994* | |
Myrmarachne japonica (Karsch, 1879) | JH2011:LEGO_44_48 | JN817063* | JN816647* | JN817283* |
Myrmarachne luctuosa (L. Koch, 1879) | P+2017:Myrm24 | KT364846* | KT364806* | |
Myrmarachne macleayana (Bradley, 1876) | P+2017:Myrm1 | KT364827* | ||
Myrmarachne rubra Ceccarelli, 2010 | CC2007: sp. A type 3 | DQ373015* | DQ372999* | |
Myrmarachne smaragdina Ceccarelli, 2010 | P+2017:Myrm10 | KT364835* | KT364797* | |
Myrmarachne striatipes striatipes (L. Koch, 1879) | P+2017:Myrm31 | KT364851* | ||
Myrmarachne sp. (tristis group) [South Africa] | BM2012:MRB113 | JX145751* | JX145900* | JX145677* |
Myrmarachne (s. lat.) helensmithae Pekár, 2017 | P+2017:Myrm13 | KT364838* | KT364800* | |
Myrmarachne (s. lat.) macaulayi Pekár, 2017 | P+2017:Myrm17 | KT364842* | KT364803* | |
Myrmarachne (s. lat.) milledgei Pekár, 2017 | P+2017:Myrm18 | KT364843* | ||
Myrmarachne (s. lat.) zabkai Pekár, 2017 | P+2017:Myrm20 | KT364844* | KT364804* |
The phylogenetic tree (Fig.
Maximum likelihood phylogenetic trees from IQ–TREE analyses. Appended to taxon names are the identification codes of voucher specimens used (see Table
Morphological synapomorphies are not known for the Levieina, except possibly the ectal spur on the paturon of the chelicera, and yet this group is well supported by the molecular data. Its diversity of body forms arguably exceeds that of the much more species-rich Myrmarachnina, and its molecular divergences are as deep. These suggest the levieines are an old radiation, with possibly many more species to be discovered in Australasia. Among forms we have seen (but do not describe here) are two more species of Leviea and three other species that may belong to Papuamyr, one of which is beetle-like.
The sister group relationship between Agorioides and Papuamyr is well supported in the molecular phylogeny, but we know of no morphological traits that support it. Indeed, some notable morphological characters are variable within the Levieina and discordant with the phylogeny (Ligonipedina, ((Leviea, (Agorioides, Papuamyr)), Myrmarachnina)). These include the antlike body (absent in Leviea but present in Ligonipedina, Agorioides, Papuamyr, Myrmarachnina, and absent outside the Myrmarachnini), the ectal spur on the paturon (present in Leviea, Papuamyr, and some Myrmarachnina), the RTA having a ventral flange (present in Ligonipes, Leviea, Papuamyr, and various Myrmarachnina, e.g.,
Toxeae, Toxeinae FO Pickard-Cambridge, 1900 (replaced due to synonymy of the type genus; see
Myrmarachneae Simon, 1901
The Myrmarachnini are characterized by antlike bodies and distinctive genitalia (
We have chosen to divide the tribe into three subtribes to reflect the group’s diversity, and to provide a formal name for the clade that would otherwise have only the informal name “Myrmarachne sensu lato”. A formal name for the clade is particularly urgent, now that the generic name “Myrmarachne” has lost its biological meaning following
While we could synonymize all Myrmarachnina back into a single genus, we have chosen not to change the current generic arrangement pending further study. The subtribe is diverse enough that it will almost certainly be split into multiple genera eventually, though possibly very differently than in Prószyński’s arrangement. (The erythrocephala group, for instance, could be its own genus, unusual among Myrmarachnina in retaining the excavate male chelicerae possibly ancestral for the tribe; see
Contained genera – Belippo Simon, 1910; Bocus Peckham & Peckham, 1892; Emertonius Peckham & Peckham, 1892; Hermosa Peckham & Peckham, 1892; Myrmage Prószyński, 2016; Myrmagua Prószyński, 2016; Myrmanu Prószyński, 2016; Myrmapana Prószyński, 2016; Myrmapeni Prószyński, 2016; Myrmaplata Prószyński, 2016; Myrmarachne MacLeay, 1839; Myrmatheca Prószyński, 2016; Myrmele Prószyński, 2016; Panachraesta Simon, 1900; Toxeus CL Koch, 1846.
Diagnosis and synapomorphies. A synapomorphy of this subtribe is the form of the male chelicerae: projecting forward but at most only slightly divergent; front surface usually flat. Distinguishing them from the ligonipedines and some levieines is the thinness of the first leg of the male: the patella through tarsus approximately the same thickness as that of other legs and of female.
Ligonipedeae Simon, 1901
Contained genera – Damoetas Peckham & Peckham, 1886, Judalana Rix, 1999, Ligonipes Karsch, 1878, Rhombonotus L Koch, 1879.
Diagnosis and synapomorphies.
Type genus: Leviea gen. n.
Contained genera – Agorioides gen. n., Leviea gen. n., Papuamyr gen. n.
Diagnosis and synapomorphies. There are no unambiguous morphological diagnostic traits known for the levieines, though there are molecular traits. We tentatively suggest as a synapomorphy of this group the ectal spur on the male cheliceral paturon (white arrow in Figs
Leviea herberti sp. n.
This distinctive genus is named in honour of Herbert Walter Levi, his partner Lorna Rose Levi, and their daughter Frances Levi. Dr. Levi (or, Herb, as he humbly preferred to be known by) was one of the grand arachnologists of the twentieth century, describing over 1200 species of spiders, mentoring many subsequent leaders of the field, and curating one of arachnology’s most important museum collections (
The form of the body is not in the least bit reminiscent of an ant, beetle or wasp, unlike other myrmarachnines. Instead, the body is of standard salticid form (e.g., Icius Simon, 1876, Salticus Latreille, 1804), somewhat glabrous, with chevron markings. Two features possibly retained from antlike ancestors are a female palp that is widened and somewhat dorso-ventrally flattened, and the many long macrosetae on the first tibia in two of the Leviea species. The male embolus is distinctive for ending broadly, not tapering to a point. As in Papuamyr, there is an ectal spur on the paturon (white arrow in Figs
Holotype: male, specimen PNG2008-0360 in
Named in honour of Dr Herbert W Levi.
Body somewhat smaller, less elongate, than the other species of Leviea, and with fewer (3 or 3.5 pairs) ventral macrosetae on first tibia. The robust dorsal branch of the RTA ends bluntly like a thumb, unlike the tapering and dorsally pointing tip of the other species. Bulb ca. 90° further rotated than in L. lornae and L. francesae, as indicated by the spermophores (Figs
Male (holotype). Carapace length 1.82; abdomen length 1.96. Carapace (Figs
Female (paratype, specimen PNG2008-0370). Carapace length 1.89; abdomen length 2.16. Carapace, legs, abdomen substantially as in male (Figs
Leviea herberti sp. n., holotype male and paratype female. 5, 6 Left palp 5 ventral view 6 retrolateral view 7 epigyne, ventral view (paratype female) 8 cleared vulva, dorsal view (same female) 9–15 holotype male 13 face; arrow shows ectal spur on paturon 14 side of carapace 15 habitus dorsal view; two photographs joined 16–20 paratype female 19 prolateral view of first leg 20 habitus dorsal view; two photographs joined. Scale bars: 0.1 mm (on genitalia); 1.0 mm (on bodies).
Holotype: male specimen in
Named in honour of Lorna Levi.
Larger and more slender than L. herberti, with more (5 pairs) ventral macrosetae on first tibia. In these features it resembles L. francesae, from which it differs in details of the palp: dorsal branch of RTA slender and distal-pointing; bulb rounder than L. francesae, less rotated than L. herberti. Epigyne with openings further posterior than those of L. herberti, and smaller RTA pocket at rear margin.
Male (paratype in
Female (paratype in
The range of this species may extend to the east. A female (specimen PNG2008-3321 in
Leviea lornae sp. n., holotype (25–32) and paratypes. 21, 22 Left palp 21 ventral view 22 retrolateral view 23 female epigyne, ventral view 24 cleared vulva, dorsal view 25 left palp, prolateral view 26 same, ventral view 27 same, retrolateral view 28 first leg, prolateral view 29 male habitus, oblique lateral-frontal view; arrows shows ectal spurs on paturon 30 dorsal view 31 ventral view 32 lateral view 33 female habitus dorsal view. Scale bars: 0.1 mm (on genitalia); 1.0 mm (otherwise).
Holotype: male, DNA voucher d254, in
Named in honour of Frances Levi.
Larger and more slender than L. herberti, with more (5 pairs) ventral macrosetae on the first tibia. In these features it resembles L. lornae. Differs from both L. herberti and L. lornae in details of the palp: dorsal branch of RTA swollen basally; bulb oval rather than circular, less rotated than L. herberti.
Male (holotype). Carapace length 2.08; abdomen length 2.38. Carapace (Fig.
Female. Unknown.
Agorioides cherubino sp. n.
Named for the spiders’ superficial resemblance to Agorius Thorell, 1877.
Antlike, with concave-sided carapace, swollen first femur, a long ocular quadrangle, long fourth trochanters, and a spinose first tibia. The carapace is sunken inward (concave) between the PME and PLE, leaving the PLE on prominent tubercles, and yielding a constriction that resembles that of hisponine salticids. The femur of the first leg is shaped like a bird’s lower leg (“drumstick”), swollen in the proximal half but thin distally. The length of the ocular quadrangle is distinctly more than half the length of the carapace. The fourth trochanter is unusually long, longer than either the coxa or the fourth tarsus. Unlike Leviea and Papuamyr, the paturon of the chelicera lacks an ectal spur, and the first tibia has many pairs of long macrosetae; both of these features can be found in some species of Myrmarachnina.
The two species described are closely similar, but distinct in the form of the palp, shape of the carapace, and in colour. They were found only seven km apart, but at distinct elevations (570 m vs. ca. 1000 m). In other salticid genera, closely related species have been observed to segregate along such an elevational gradient in the same area (e.g., Cucudeta zabkai Maddison, 2009 vs. Cucudeta uzet Maddison, 2009 at 1170 m vs. 1450 m [
Holotype: male in
In the Levis’ country home they hosted many animals, domesticated and not. One of these was a dog of multifarious ancestry, Cherubino, named after the character in Mozart’s opera The Marriage of Figaro. The spider resembles the dog in having a hairy, grizzled appearance.
Differs from A. papagena in having the tibia of the male palp distinctly narrower than the cymbium (Figs
Male (holotype). Carapace length 2.16; abdomen length 2.27. Carapace (Figs
Female. Unknown.
One penultimate instar male (specimen PNG2008-2765, in
Agorioides cherubino sp. n., holotype male. 42, 43 Left palp 42 ventral view 43 retrolateral view of tibia 44–46 carapace 44 lateral view 45 dorsal view 46 oblique dorsal-lateral view 47 male habitus, dorsal view 48–50 living specimen. Scale bars: 0.1 mm (on genitalia); 1.0 mm (otherwise).
Holotype: male in
The Levis’ love of opera was reflected in their animals’ names, including their dog Papagena, named after the character in Mozart’s The Magic Flute. The spider does not look like the dog or the opera character. Although the holotype is a male, the species is named for the female that remains to be found.
Differs from A. cherubino in having the tibia of the male palp almost as wide as the cymbium (Fig.
Male (holotype). Carapace length 2.84; abdomen length 3.24. Structure of body, legs as in A. cherubino (Figs
Female. Unknown.
One juvenile (specimen PNG2008-1676, in
Agorioides papagena sp. n., holotype male except for 59 (juvenile). 51, 52 Left palp: 51 ventral view 52 retrolateral view of tibia 53 Carapace, lateral view. 54 Frontal-lateral view 55, 56 dorsal habitus 57 first leg, prolateral view (two photographs joined at broken patella-tibia joint) 58 living holotype 59 juvenile from type locality. Scale bars: 0.1 mm (on genitalia); 1.0 mm (otherwise).
A single large female from the Muller Range is clearly an Agorioides by carapace shape and long fourth trochanters (the first legs are missing), but is not formally described here because the specimen is missing most of its legs. It seems likely to represent a distinct species, as it has a carapace that is flatter (Fig.
Papuamyr omhifosga sp. n.
A blend of Papua and the first syllable of the name of the related genus Myrmarachne. To be treated as feminine, as is Myrmarachne.
Small antlike salticids with somewhat swollen male first legs, vertical and excavated male chelicerae with an ectal spur on the paturon, a round bulb on the palp, and a relatively long RTA. In contrast, the Ligonipes group of genera has the bulb of the male palp compressed laterally (
Papuamyr lacks the morphological diagnostic characters of the Ligonipedina and Myrmarachnina, but we have not found morphological characters that place it more clearly. The molecular data, however, are clear that Papuamyr is within the Levieina and a close relative of Agorioides (Fig.
Holotype: male, specimen
A combination of letters derived from the first letters of words in a statement of Herbert Levi’s from approximately 1985. He had forgotten to do some bureaucratic task, and in dismay, he exclaimed “Och, my head is full of spider genitalia!” Truly, it was, and for that knowledge which he conveyed to us, arachnology is forever enriched. The name is particularly apt for this species: its genitalia are distinctive and elegant, the palp having a long transparent RTA and sharply bent embolus, the epigyne an RTA pocket displaced far to the anterior.
Distinct for its unusual genitalia and its orange and black bicoloured body. The embolus tip extends onto the retrolateral side of the cymbium before looping back to terminate ventrally, much as seen in many amycoid salticids such as Tartamura (
Male (holotype). Carapace length 1.31; abdomen length 1.24. Carapace (Figs
Female (paratype, specimen # PNG2008-2603). Carapace length 1.13; abdomen length 1.46. Carapace (Figs
Papuamyr omhifosga sp. n., holotype (66, 67, 70, 75) and paratypes. 66, 67 Left palp of holotype 66 ventral view 67 retrolateral view 68 epigyne of specimen PNG2008-2603, ventral view 69 cleared vulva of same specimen, dorsal view 70 left palp of holotype, oblique ventral-terminal view; arrow shoes bend in embolus 71 face of male, oblique frontal-lateral-dorsal view; arrows show ectal spurs on paturons 72 carapace, lateral view 73, 74 living male 75 habitus, dorsal view, holotype male 76 habitus, dorsal view, female
Holotype: male, specimen in
From the Greek “all giving” or “all gifted”, referring primarily to the gifts given us by the Levis, most memorably the 1254 species that Herb described, and the wonderfully abundant Thanksgiving celebration dinners that Lorna put on for their students each year. It is also the name of the dog Lorna had when Herb and Lorna were married.
Distinct in having the thoracic hump higher than the ocular area in both sexes (Figs
Male (holotype). Carapace length 1.52; abdomen length 1.41. Carapace (Figs
Female: (paratype, from collecting event #P5013). Carapace length 1.41; abdomen length 1.54. Carapace (Figs
Papuamyr pandora sp. n., holotype, except 81, 82 and 88–89 (paratype). 78–80 Left palp 78 prolateral view 79 ventral view 80 retrolateral view 81 female epigyne, ventral view 82 cleared vulva, dorsal view 83 male carapace, frontal view 84 oblique lateral-ventral view showing patural teeth (indicated by arrows) 85 male habitus, dorsal view 86 ventral view 87 lateral view 88 female habitus dorsal view 89 lateral view. Scale bars: 0.1 mm (on genitalia and 83); 1.0 mm (otherwise).
We would like to thank Domir De Bakker, arachnid coordinator of “Our Planet Reviewed Papua-New-Guinea” in partnership with the Royal Belgian Institute of Natural Sciences, for facilitating access to the expedition’s material. László Dányi provided access to the Balogh collection. We thank Heather Proctor, Marek Żabka, Ingi Agnarsson, and Michael Balke for supplying additional specimens. Geneviève Leduc-Robert and Edyta Piascik performed DNA extractions and PCR for sequencing. Galina Azarkina, G B Edwards, and Takeshi Yamasaki provided helpful comments on the manuscript. Wayne Maddison’s portion of this work was supported by an NSERC Discovery grant and (for field work) by Conservation International (see Acknowledgements in