Anoplodactylus Wilson, 1878

Arango, Claudia P., 2003, Sea spiders (Pycnogonida, Arthropoda) from the Great Barrier Reef, Australia: new species, new records and ecological annotations, Journal of Natural History 37 (22), pp. 2723-2772 : 2746-2747

publication ID

https://doi.org/ 10.1080/00222930210158771

persistent identifier

https://treatment.plazi.org/id/F10B8791-FF8F-FFAB-2663-115AF6C47EC3

treatment provided by

Felipe

scientific name

Anoplodactylus Wilson, 1878
status

 

Genus Anoplodactylus Wilson, 1878 View in CoL

Key for 21 Anoplodactylus species known from Australia based on characters of adult males and females (most of the species have been reported from Queensland unless otherwise stated) 1 Trunk length 1 mm or less................ 2

– Body size larger, trunk length more than 1.5 mm .......... 5

2 Largest heel spine on propodus pectinate..... A. pectinus Hedgpeth, 1948 – Heel spines smooth, without armature............. 3

3 Proboscis slender, noticeably upturned and tapering distally........

................ A. batangensis (Helfer, 1938) – Proboscis straight or nearly straight, robust, slightly inflated at mid-point... 4

4 Male cement gland a single mid-dorsal tube on femur......... 5 – Cement gland openings in form of pores, slits, or cups, single or multiple... 11

5 Extremely small (approx. 0.5 mm), compact body, crurigers touching..... 6 – Trunk length between 0.6 and 1 mm, distance between crurigers as great as half the crurigers’ diameter or less but never touching distally......... 10

6 Proboscis slightly upcurved, somewhat tapered.......... 7 – Proboscis straight, barrel-shaped.............. 8

7 Sides of neck concave, males with ventral genital spurs on the second coxae of last pair of legs; legs short, robust (‘ Halosoma ’- type)..... A. concavicollis n. sp.

– Broad lateral wings between neck and first pair of crurigers, other characters similar to A. concavicollis ........... A. chamorrus Child, 1983

8 Cement gland tube as long as femur is wide, single propodal spine, no genital spurs in males............... A. calliopus Staples, 1982 – Cement gland tube as long as half width of femur or less........ 9

9 Proboscis with distal lateral projections, distinct armature on immovable finger, with auxiliary claws.......... A. haswelli (Flynn, 1918) (NSW)

– Proboscis rounded distally, chelae fingers with tiny denticulations, almost smooth, auxiliary claws absent.......... A. minusculus Clark, 1970

10 Crurigers separated by half their diameter, cement gland tube widened at base, chelifores touching each other in the proximal part diverging distally...................... A. squalidus Clark, 1973 (NT)

– Crurigers close but not touching, cement gland tube or cone very low, proboscis ventrally spinulated.......... A. spinirostrum Stock, 1973 (SA)

11 Male cement glands two to five cups on femur; trunk not distinctly segmented; propodus with five heel spines........ A. glandulifer Stock, 1954 – Cement gland openings in the form of pores or slits......... 12

12 Cement gland a single small pore, proboscis barrel-shaped, propodus with two heel spines, knobs as remains of palps....... A. cryptus Stock, 1994 (NT) – Cement gland openings five to eight slits dorsally on each femur, proboscis angulate distally............ A. pycnosoma (Helfer, 1938) (WA)

13 Ocular tubercle extremely tall, half the length of the trunk; crurigers widely separated (by twice their diameter).... A. tubiferus (Haswell, 1884) (Vic, NSW, Qld) – Ocular tubercle low or medium size, not as tall as above........ 14

14 Body extremely slender and tenuous; crurigers separated almost six times their own diameter............... A. tenuicorpus Child, 1988 – Body not elongate, crurigers separated by twice their diameter or less.... 15

15 More than one cement gland opening, with small auxiliary claws...... 16 – Cement gland opening a single dorsal duct or tube, short or long..... 17

16 Cement glands of males two low cups dorsally on femur, dorsal tubercle distally on femur; ocular tubercle erect, pointed....... A. longiceps Stock, 1951 – Single row of more than 10 cement gland opening pores dorsally on each femur; legs and body with no tubercles, ocular tubercle slightly forward........... A. cribellatus Calman, 1923 (syn. A. simplex Clark, 1963 sensu Bamber 1997 )

17 Palp buds present, single slender tube as cement gland opening (only male known); tiny auxiliary claws............. A. brucei Child, 1990 – Palp buds completely absent............... 18

18 Proboscis of females with two ventral protuberances, genital protuberances ventrally on second coxae of third and fourth pairs of legs in males....... 19 – Proboscis of females with four ventral protuberances......... 20

19 Ocular tubercle pointing anteriorly; individuals of small size (1.0– 1.3 mm trunk length); proboscis slightly upturned; auxiliary claws absent.. A. proliferus n. sp. – Ocular tubercle short, truncated; large specimens (3.3 mm trunk length) with auxiliary claws............ A. evansi Clark, 1963 (NSW, Tas)

20 Legs smooth, no conspicuous spines or dorsal tubercles; cement gland a long and straight mid-dorsal tube........... A. digitatus Böhm, 1879 – Coxae with spines; distal spinose tubercles on femur and first tibia; cement gland a short duct dorsal on femur......... A. versluysi Loman, 1908

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