Breinlia (Breinlia), 1926

Spratt, David M., 2011, New records of filarioid nematodes (Nematoda: Filarioidea) parasitic in Australasian monotremes, marsupials and murids, with descriptions of nine new species 2860, Zootaxa 2860 (1), pp. 1-61 : 40-41

Key to species of Breinlia (Breinlia) from Australasian marsupials and murids

1 Cloacal papillae clustered around cloacal aperture in male, microfilaria with short non–filamentous tail with kink......... 2

- Cloacal papillae dispersed anterior and posterior to cloacal aperture, microfilariae with long filamentous tail without kink.. 4

2(1) Gubernaculum shaped like the top spike of an halberd viewed upside down........................... B. (B.) bigenera

- Gubernaculum not shaped like the top spike of an halberd viewed upside down.................................... 3

3(2) Vulva well anterior to oesophago–intestinal junction, glandular region of oesophagus short, caudal alae present in male.............................................................................................. B. (B.) dasyuri

- Vulva well posterior to oesophago–intestinal junction, glandular region of oesophagus long, caudal alae absent in males.......................................................................................... B. (B.) dentonensis

4(1) Caudal extremity of male with two large terminal lappets and two large caudal glands.................. B. (B.) ventricola

- Caudal extremity of male without two large terminal lappets and without two large caudal glands...................... 5

5(4) Caudal extremity of male with subterminal and/or terminal papillae and additional papilliform cuticular structures......... 6

- Caudal extremity of male with subterminal and/or terminal papillae, without additional papilliform cuticular structures..... 7

6(5) Spicule ratio ≥ 1:4, peribuccal fields and internolateral papillae absent................................. B. (B.) spelaea

- Spicule ratio <1.2, peribuccal fields and internolateral papillae present.............................. B. (B.) trichosuri

7(5) Spicule ratio <1.4,>1:3.4................................................................... B.(B.) dorcopsis

- Spicule ratio <1:3.4.................................................................................... 8

8(7) Cuticle with longitudinally elongate refractile bosses arranged in transverse bands in posterior end of male. B. (B.) dendrolagi

- Cuticle with or without longitudinally elongate refractile bosses, if present, not arranged in transverse bands in posterior end of male............................................................................................... 9

9(8) Males <15 mm and females <20 mm long, right spicule <10, distal tip spatulate and with three digitform protuberances. B. (B.) tricondylus

- Males> 15 and females> 20 mm long, right spicule> 10, distal tip spatulate, without three digitiform protuberances..... 10

10(9) Parasites of marsupials................................................................................ 11

- Parasites of murid rodents.............................................................................. 19

11(10) Parasites of peramelid, petaurid and pseudocheirid marsupials................................................ 12

- Parasites of macropodoid marsupials..................................................................... 14

12(11) Male tail ≥ 690 long, female tail ≥ 1140 long, parasites of bandicoots............................... (B.) mackerrasae

- Male tail ≤ 630, female tail <1100 in length, parasites of petaurid and pseudocheirid possums........................ 13

13(12) Left spicule> 440, parasites of petaurid possums in PNG............................................ B. (B.) oweni

- Left spicule <400, parasites of pseudocheirid possums in Australia............................... B. (B.) pseudocheiri

14(11) Males <45 mm long, females ≤ 120 long.................................................................. 15

- Males> 45 mm long, females ≥ 120 long................................................................. 16

15(14) Cephalic papillae of outer circle large and ear–like, cuticular bosses restricted to posterior ventral surface of male only extending anteriorly from cloaca 2–3 mm ........................................................... B. (B.) beveridgei

- Cephalic papillae of outer circle moderately large but not so ear–like in appearance, cuticular bosses commencing in region of glandular oesophagus in both sexes and extending most of length of body............................. B. (B.) thylogale

16(14) Left spicule ≥660, right spicule ≥225, lamina of left spicule> 150, filament of left spicule ≥ 255........... B. (B.) macropi

- Left spicule ≤ 650, right spicule ≤220, lamina of left spicule <150, filament of left spicule ≤ 255..................... 17

17(16) Left spicule <300, right spicule <150.......................................................... B. (B.) robertsi

- Left spicule>450, right spicule> 150.................................................................... 18

18(17) Cuticular bosses present over lateral lines of females, one pair of minute latero–ventral papillae on caudal extremity of females, microfilariae <230 in length and distance LNT <40, generally parasites of northern macropodoids... B. (B.) boltoni

- Cuticular bosses absent over lateral lines of females, one pair of subterminal latero–ventral papillae and a single, larger terminal papilla on caudal extremity of females, microfilariae> 290 in length and distance LNT>40, generally parasites of southern macropodoids............................................................................ B. (B.) mundayi

19(10) Right spicule>150 long parasites of conilurine rodents....................................................... 20

- Right spicule <150 long, parasites of uromyine rodents.......................................... B. (B.) melomyos

20(19) Left spicule> 410 and right spicule>170 long, filament of left spicule 180–230 long, two cuticular peribuccal fields present in apical view............................................................................. B. (B.) presidentei

- Left spicule 360–400 and right spicule 160–200 long, filament of left spicule 110–130 long, cuticular peribuccal fields absent in apical view........................................................................... B. (B.) zyzomyos