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Insecta: Neuroptera) of the World JOHN D. OSWALD Department ofEntomology, Texas A&M University, College Station, 7X, i2S.A. ANNOTATED CATALOGUE OF THE DILARIDAE (INSECTA: NEUROPTERA) OF THE WORLD Oswald, J. D., 1998. Annotated Catalogue of the Dilaridae (Insecta: Neuroptera) of the World. - Tijdschrift voor Entomologie 141: 115-128. [ISSN0040-74961. Published 30 November 1998. The neuropteran family Dilaridae is catalogued. Data on the status, primary type, type locality and original place of publication are given for 67 valid species and 14 synonymous species- group names. Status, type species, etymology and gender information are given for four valid genera and seven synonymous genus-group names. Nepal is reported as a previously unrecog- nized synonym of Dilar. Dilargrandis and Dihr marmoratw are new combinations from Rex- auizrs. Berothelkz bannana is removed from the Dilaridae and transferred to the family Beroth- idae as Berotha bannana, comb. n. Dr. John D. Oswald, Department of Entomology, Texas A&M University, College Station, 'IX 77843-2475 USA E-mail: [email protected]. Key Words. - Dilarinae, Nallachiinae, pleasing lacewings, systematics, taxonomy The neuropteran family Dilaridae, 'pleasing lace- and genus, and it and its relatives have long been rec- wings', is a small family presently composed of 67 ognized as a distinctive group within the Neuroptera. Dilar valid recent suecies,&' with a combined distribution en- The genus was originally placed by Rambur in compassing parts of North and South America, Eu- his 'Trihu Semblides', together with several genera rope, Asia and Africa. Dilarids form a distinct clade now placed in the orders Megaloptera and Raphidio- within the order Neuroptera, and are characterized by ptera. Soon thereafter, Newman (1853), in his reclas- males with pectinate antennae, females with elongate sification of the Neuroptera sensu lato, provisionally ovipositors (a feature that they share with raphid- placed the 'Dilaridae' as a division of his group Ste- iouterans and some mantisoids),1 ,. and distinctive de- goptera, subgroup Corydalina, along with taxa now tails of the terminalia in both sexes. Dilarids are rela- attributed to the Ithonidae and Meealootera." ' New- tively rare both in the field and in collections and are man's classification was not widely adopted and his of no known economic importance. Immatures are name Dilaridae appears not to have come into gener- associated with soil or dead wood. No fossil dilarids al use. By the late 1800's Dilar was recognized as a are currently known. The purpose of the present neuropteran (planipennian) genus, and was typically work is to provide a concise bibliographic, nomen- included within a broad concept of the family He- clatural and taxonomic foundation for the family that merobiidae. During" the first two decades of the twen- can serve the twin aims of providing an entry point tieth century, the taxonomic concept of the Hemero- into the scattered dilarid literature and a stimulus for biidae was radically altered. Many genera and groups further systematics study of the group. of genera were formally aggregated or reaggregated into family-group taxa during this period, and several of these were widely accorded full family rank. History Among these groups was the Dilaridae, which was The rarity of dilarids in the field is underscored by treated as a tribe (Dilarini, e.g., Navris 1914), sub- the fact that the first known species, Dilar nevadensis, family (Dilarinae, e.g., Banks 1913) and full family does not appear in the scientific literature until 1838 (Dilaridae, e.g., Handlirsch [1906]) during this time. (Rambur 1838, illustrated), and was not formally de- Current usage accords dilarids family rank, with two scribed until four years later (Rambur 1842) - a com- subfamilies, the Dilarinae and Nallachiinae. paratively late date for a genus of insects that possess- Navis ([I 909a], 19 14), in the earliest revisionary es several species with an aggregate distribution studies of the group, synthesized the prior descriptive stretching broadly across southern Europe. Dilar ne- work of nineteenth century authors and his own early vadensis was treated at its inception as a new species twentieth century work on the fauna of Spain and TIJDSCHIUFTVOOR ENTOMOLOGIE,VOLtJME 141, 1998 neighbouring regions. In his 19 14 review of the fami- (ii) What monophyletic subgroups can be recog- ly for the Genera Insectorum, Navis recognized seven nized within this fauna?, based on what characters?, genera and 26 species. Of these, 21 species, but only 2 (iii) What is(are) the phylogenetic relationship(s) genera, are presently considered valid. During the between Old and New World dilarids?, Navisian era heavy emphasis was placed on venation- (iv) How old is the dilarid clade?, al traits as diagnostic characters for the identification (v) Why are there no known dilarid fossils?, and justification of new neuropteran taxa at all ranks. (vi) Why are dilarids absent from Australia? During this period, however, the full extent of vena- Any study of the higher phylogeny of the family tional variation was frequently not well known for should include representatives of New World Nal- taxa established at both the specific and generic levels. lachius, Old World Dilar and Berothellrr and the actu- Subsequent reevaluation of generic limits, based prin- al or possible Old World nallachiine taxa Nallachius cipally on male terminalic traits, has lead to a reduc- krooni (southern Africa), Nallachiw ponomarenkoi tion in the number of accepted dilarid genera, and it (Vietnam) and Neonallacbius annandalei (India). is now widely recognized that considerable venational plasticity exists in many dilarid species. Characters of Biology the male terminalia have now come to reolace vena- tional traits as the characters of choice for delimiting Dilarid biology is poorly known. The larvae of only dilarid taxa, especially species. Although male termi- five species are known, only four of which have been nalic characters were figured as early as 1909 (Navis described. Thc best known of these is the Nearctic- [1909a]), the added effort and difficulties of studying, Neotropical species Nallachius americanus, whose lar- describing and figuring this complex character system vae have been reoorted from under the bark of both hindered its use and the full recognition of its value recently- and long-dead broadleaf trees, where they during the early twentieth century. As in other neu- undoubtedly feed on soft-bodied arthropod prey that ropterid groups, however, dilarid studies profited occur in the same microhabitat (Gurney 1947, from the growing realization throughout the 1930's MacLeod & Spiegler 1961). Larvae of Dilar turcicw that the male terminalia provided a significant new and Dilar septentrionalis have been collected from soil source of novel. stable and reliable soecies-level char- samples, Ghilarov (1962) and Makarkin (pers. acters. Subsequent reviews and revisions of dilarid comm., larvae not described), respectively. The larvae taxa (e.g., Carpenter 1940, 1947, Nakahara 1955b) of two additional species, Nallachius krooni and Dilar made extensive use of male terminalic traits, and pumilus, have been reared from eggs laid by captive modern descriptions and revisions (e.g., Adams 1970, females, see Minter (1992) and Monserrat (1 988b). Aspock et al. 1980, Monserrat 19881-3) rely heavily on Until recently, all known adult dilarids were fully male terminalic characters to delimit species. macropterous and presumed to be volant. However, Pantaleoni & Letardi (1996) report the capture of a brachypterous Dilar female that is probably attribut- Future Research able to Dilarpartbenopaeus. The most pressing current need in dilarid system- atics is for a comprehensive revision of Old World di- Keys larine species. The last complete revisions covering the Old World are the seriously outdated works of A key is provided below to the two subfamilies of Navis ([1909a], 1914). Since that time, the number the Dilaridae. The subfamily Nallachiinae currently of nomenclaturally valid Old World dilarid species contains only a single valid genus, Nallachius. The has approximately tripled. The European dilarid fau- three nomen~laturall~valid dilarine genera listed in na has recently been the subject of several good revi- the following catalogue are widely considered only sionary treatments (Aspock et al. 1980, Monserrat doubtfully distinct. For this reason, a key to these taxa 1988b), but the lack of a synthetic work for the Ori- has not been attempted. The construction of a reli- ental region and the adjacent parts of central and east- able key to supraspecific taxa within the Dilarinae ern Asia renders positive identification of material cannot proceed until revisionary studies that identifj from these areas extremely difficult. The size of such more rigorously diagnosable subgroups within this a project (ca. 50 species) would be quite appropriate taxon have been completed. Bibliographic references for a Ph.D.-level dissertation. Questions of interest to published species-level keys in the genera Dilarand include: Nallacbius are cited below under their respective cata- (i) How variable are male terminalic traits among logue entries. Old World dilarids?, OSWALD:Catalogue of the Dilaridae Collection, Beijing, China; BMNH Natural History Museum [formerly the (after Adams 1970, New 1989) British Museum (Natural History)], London, England, United Kingdom; 1. Forewing MA branching from R basal to fork INBIO Instituto de Biodiversidad, Santo
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