Diplopoda, Chordeumatida, Craspedosomatidae) 29-48 ©Staatl
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ZOBODAT - www.zobodat.at Zoologisch-Botanische Datenbank/Zoological-Botanical Database Digitale Literatur/Digital Literature Zeitschrift/Journal: Andrias Jahr/Year: 2001 Band/Volume: 15 Autor(en)/Author(s): Spelda Jörg Artikel/Article: Review of the millipede genus Pterygo- phorosoma Verhoeff, 1897 (Diplopoda, Chordeumatida, Craspedosomatidae) 29-48 ©Staatl. Mus. f. Naturkde Karlsruhe & Naturwiss. Ver. Karlsruhe e.V.; download unter www.zobodat.at andrias, 15: 29-48, 8 figs; Karlsruhe, 15.12.2001 29 J ö r g S p e ld a Review of the millipede genus Pterygo- phorosoma V e r h o e f f , 1897 (Diplopoda, Chordeumatida, Craspedosomatidae) Abstract Padella near Samaden (= Albula Pass, Switzerland), Based on topotypic material from Schaubachhütte, South the place whence he described a male. Even at present Tyrol, Italy, a redescription of Pterygophorosoma alticolum it remains unclear if both taxa are indeed different. (Verhoeff , 1894) is provided, and the present state of know The above shows both the degree of confusion and ledge of the genus is discussed. that at least topotypoids of alticolum, better coupled with type material of dormeyeri, would be crucial to Kurzfassung Übersicht über die Gattung Pterygophorosoma Verhoeff , finally clarify the identity of Pterygophorosoma alti 1897 (Diplopoda, Chordeumatida, Craspedosomatidae) colum. Anhand von Topotypoiden von der Schaubachütte in Südtirol During an excursion, supported by a grant received (Italien) erfolgt eine Wiederbeschreibung von Pterygophorosoma from the von-Kettner-Stiftung, the author made in alticolum (Verhoeff , 1894). Der derzeitige Kenntnisstand über September 1999 to clarify the status of some taxa of die Gattung Pterygophorosoma wird zusammengefasst und Central European soil organisms, several known and diskutiert. new localities where members of the genus Pterygo phorosoma might be expected to occur were visited. Author Dr. Jörg Spelda , Staatliches Museum für Naturkunde Karlsru At least in part the trip was successful, as It was possi he, Erbprinzenstr. 13, D-76133 Karlsruhe. ble to obtain topotypoids of P. alticolum from near Schaubachhutte near Sulden in the Ortler Mountain Key words Range, South Tyrol. The occasion is taken here to Diplopoda, taxonomy, standardisation of descriptions, rede both provide a review of the genus Pterygophorosoma scription, synonymy, distribution, ecology and to complement the description of its type species. It is remarkable that lulogona tirolense has also been described from the Sulden Valley. It was possible to 1. Introduction collect this species only a few kilometres away from its type locality several times during that excursion. In his classification of the Diplopoda, Hoffman (1980) pointed out three problematic genera within the Cras pedosomatidae that required further clarification 2. Material and methods through getting and studying topotypic material. These genera were Aporogona Cook , 1895, Basigona Cook, 2.1 Specimens studied 1895, and Pterygophorosoma Verhoeff , 1897. Hoff Three males, three females and nine juveniles have been man (1980) noted also that it was Pterygophorosoma, collected only a few hundred metres west of Schaubachhutte, 4 km south of Sulden, South Tyrol, Italy, on a northern slope in proposed for Atractosoma alticolum Verhoeff , 1894, a a depression under stones. species described based on female material, that For comparative purposes, another male has been provided should cause no problems in obtaining topotypoids by Dr. Ariane Pedroli-Christen , collected in the Swiss Natio from Schaubachhutte near Sulden, Italian Alps. nal Park at the summit plateau of Munt La Schera (2500-2540 m Hoffman (1980) obviously overlooked that A. alticolum a.s.l.) (Dethier & P edroli-Christen 1983). had long been assigned to the genus Orotrechosoma. This was perhaps because Jeekel (1970) had selec 2.2 Geographical reference to localities ted different type species for both of these genera. But In some cases it is quite easy to find localities given in fauni- as these two species show only slight differences, the stic or taxonomic papers, but in other cases it is really a detec re is no doubt that they are congeneric. tive game. Unfortunately, never ever the German myriapodo- Ignoring his own, older, female-based description from logists of the classical period gave co-ordinates. This makes it quite difficult to produce maps. For this reason, whenever Schaubachhhutte, Verhoeff (1911) described Orotre possible, the co-ordinates of the cited localities have been chosoma alticolum dormeyeri, this time based on male determined. They are given in decimal degrees. Western material and deriving exactly from the same locality, longitude and southern latitude are marked with a negative and he distinguished it from the “true” O. alticolum. He sign. This way of representation is to be preferred over the chose to attribute the latter name to material from Pic classical form with degrees, minutes and seconds as it is ©Staatl. Mus. f. Naturkde Karlsruhe & Naturwiss. Ver. Karlsruhe e.V.; download unter www.zobodat.at 30 andrias, 15 (2001) easier to store in electronic databases and allows an easier me of such modifications are sex-linked, e.g. in males access via GIS systems. In the present paper the so-called in species of the genus Ophyiulus Berlese , 1884 and German “Generalkarten” have been used to determine the of the order Stemmiulida. Chordeumatida in general co-ordinates. show special structures above the inner palps (Cook & Based on the co-ordinates, a map has been produced. Type localities of taxa have been marked with arrows, pointing from Collins 1895). These structures are usually more or the name to the locality. This convention should be used as a less tri- or quadridentate (figs. 4i-j). They are called standard In future. styliform processes. They do not appear to exist in other orders of millipedes, except in some Polydesmi- da. In Mastigona mutabile (L atzel , 1884) (fig. 4j) 3. Standardisation of descriptions in the Craspe- and M. bosniense (Attems , 1899) (Attems 1926, p. dosomatini and other millipedes 37, fig. 40), the innermost cone of the internal palps is modified into a serrate hyaline lobe. This character, Unfortunately even now descriptions in millipedes perhaps occurring in all Mastigophorophyllidae, has are not standardised. This often makes it difficult to not been observed in several other members of this compare taxa with each other. Another special case order. in present-day millipede systematics is neglect of peri Although the structure of the mandible is known to pheral characters in favour of gonopods, the male carry important taxononomic characters too (Enghoff secondary copulatory organs. The reason is, that the 1979, Kohler & A lberti 1990), it is largely neglected authors of the classical period, especially Attems , in species descriptions, perhaps because of the diffi Brolemann and Verhoeff , based their classifications culties in preparation (destruction of the head) and exclusively on gonopod structure. Descriptions often drawing (Shear 1972). consisted only of gonopod drawings and their verbal description. Consequently it is mostly impossible to antennae identify a species without having a male, although The antennae often allow discrimination of taxa at hig from time to time promising attempts have been made her, genus or family, taxonomic levels. It was appa to alter this (e.g. Ribaut 1913, Schubart 1934). The rently Ribaut (1913) who was the first to recognise the fact that the descriptions appear to be dispersed over antennae as an important taxonomic character. Accor a great amount of small papers, often published in ding to Ribaut (1913), the length and width of each of rare/obscure periodicals, makes it extremely difficult the seven antennomeres, and their length-width index not only to gather all relevant literature but also to must be considered. Unfortunately, this procedure had consider everything. Summarising the present know not been standardised until Enghoff (1992) proposed ledge and supplementing the descriptions if neces dorsal measurements (fig. 1a). sary, i.e. building up a homogeneous foundation for At about the middle of the 7th antennomer, and poin comprehensive comparisons, becomes increasingly ting laterad when the antennae are extended, there is topical. a solitary, rather slender, mammillate-conic, transpa In succession some character complexes will be trea rent protuberance, narrowed at the tip and produced ted that must be taken into account in future descrip into a long, very slender, and exceedingly fine-pointed tions. At present this attempt is to be considered as hair. As discovered still by Cook & C ollins (1895), this preliminary, to be completed at a later time. structure is characteristic of the order Chordeumatida, not occurring in other millipede orders. head In some millipedes either the males or both sexes segments show bosses, depressions or darker sclerotized struc Shape of the tergites, especially their lateral expan tures like horns. At present, no head modifications sions and the position of the macrochaetae are other than a flattened irons of the male (figs. 5b-c) in among the most important taxonomic characters in nearly all Craspedosomatidae are known. the order Chordeumatida. Unfortunately, only very few authors provided meaningful drawings. Even ra mouthparts rer, the number of the depicted body segment has be Structure of the mouthparts has been used from time en mentioned. Again it was Ribaut (1913) who