| OCR Text |
Show 6 . . . . . . . • . . . . . . . ... . .. . .. . .. .. . . . . . . . . • . spbaerotheroid .an Suborders: Glomerid101de1 7 pairs of legs before the gonopods; labrum 3 or rarely two-toothed; mouth parts all well-developed- gnathochiIarium with three pairs of feelers' 4a. 4b. 5 2 Superorder Helminthomorpha: showing prominently at ;ide 8 pairs of legs before the gonopods; the whole head elongated, ball-like to slender and snout-like, with strongly modified mouth parts; labrum toothless; cardo not 12 3 superorder Colobognatha observable as cheek from outside: 19 to 21 segments, lateral keels present or else cylindrical; f?rming e prozonite no spmmng a ventrally closed ring; most sternites rigidly united with tergttes; the second glands; first pair of legs of the 7th segment modified into gonopods, Order 1 Polydesmida pair normal walking legs Polydesmoidei and Suborders: Strongylosomoidei 26 or more segments, body cylindrical or with keels; the prozonite open below, the sternites being free and not sharing in the formation of the cylinder; 2 to 3 pairs of spinning glands on posterIor end, opening through 1 to 3 pairs of spinning stylets on anal segment; only the first or both pairs of legs of the 7th segment modified into 6 gonopods. 40 or more cylindrical segments; the sternites united with the tergites, the pro zonites shartng in the formation of the cylinder; no spinning glands; both pairs 9 of legs of the 7th segment modified as gonopods or the second pair absent 7 absent of 26-32 (usually 30) somites; repugnatorial glands Body fifth the and on of 39 or more present Body somites; repugnatorial glands 8 following somites First tergite small; each somite above with three pairs of bristles arising from . cardo ...• •...•.. · • . . ... 5a. .. · 5b. 5c. . . . . • . . . • .. • . . . ... . ..... . . . . .. . . . . . . • . . . . . . . . . . . . . . . • • .. • • • .. . . . • • • . .. . . . . . • . . . . . • . . . . . . . . • . . ..•.•.. 6a. 6b. ..........•... .....•..•..•••.•.......•..•••••••..•.•.•.••.• 7a. 8a. 2 Order Chordeumida First tergite very large, its sides partly enclosing the head; body capable of being rolled into a spiral; some tergites with strong longitudinal carinae; a few ocelli at each side of the head. 3 Order Striariida Promentum present as a separate sclerite in front of the mentum; ocelli numerous 8b. Promentum 9a. Stipites meeting minute tubercles 7h. .. · . . . . • . . . . . . . . . • • . . '. lOa. . . . . . . . . . . .. . . . . . . . .. . . . . a . . . . . . . . distance • . . . • . . . . lla. . . the male modified. 12a. 4 Order . • . . . . . .. . Lysiopetalida . • . 5 Order Stemmiulida. .• . . . 6 Order Julida. .. . • . . . . . . . • . . . .. . . . . . • . . . . . .• Tergites, pleurites . . . . . . . • . • . . • . • . . . • . . . . • . . . • . . . • . . . . . • . . . • . • . . . . . . . . • . . . . . . . . . . .. . . . . . . . . . . . . . . •. . . . . . . • . . . . . .. 9 Order Cambalida . completely coalesced; body cylindrical 1 Order Siphoniulida Sternites always, and pleurites often, free, t.e. connected only by a membrane with the adjacent parts ........•......•... · 12b. . Stipites not meeting along the median line, widely separated by the mentum or 10 promentum; promentum, if present, in contact with mentum. Promentum absent; mentum large, triangular, extending between the prebasilares and stipltes which it separates widely; last joint of legs of male generally padded, but not the fourth and fifth joints. 7 Order Spirobolida Promentum present or absent; mentum surrounded at the sides by the stipites which extend backwards and lie in contact with the 11 prebasilare. Mentum broadly triangular; its anterior angle lying far behind the front margin of the stipites 8 Order Spirostreptida ..•........... Mentu.m elongate-triangular; its anterior angle extending far forward, dividing the gnathochilarium completely to its anterior margin; first pair of legs of . lib. • along the median line, separating the promentum . lOb. • ..•.........••... two ocelli at each side of head one or for from the mentum 9b. . absent; • • . • . ..•......•..•. • .. . . . . . . . . . . and sternites . . . .. . . • . . ..•.. • . •. ...... · " •. · · • ... · ... . 13 |
