Gorongosa National Park

Last week, I returned from a field trip to Gorongosa National Park in Mozambique. This trip included field work to collect millipedes in Gorongosa National Park and a two-week  workshop on arthropod macrophotography.


Doratogonus sp. (Spirostreptida) from Chitengo Campsite, Gorongosa National Park | Picture 2

Gorongosa National Park, at the southern end of the Great African Rift Valley in Mozambique, encompasses ~4,000 km-sq of acacia and savanna habitats with sand forests, limestone gorges, and rainforests scattered throughout the park. Mount Gorongosa, in the northwestern section of park, holds a diversity of habitats along its 1,863 m. elevational gradient, including rainforests and waterfalls.


Lake Urema with Mount Gorongosa and Bunga Inselbergs in the distance

I took a flight from Washington to Johannesburg, South Africa, and then to Beira, Mozambique. Finally, I boarded a 10-seater prop-plane to Chitengo Campsite in Gorongosa National Park where we landed on a surprisingly smooth grass landing strip (movie, 29.4 MB).


Savanna and a Fever tree with its green photosynthetic bark in the background (left)

Most of the habitat in Gorongosa National Park is savanna with pockets of unique habitats—typically more mesic ones—sprinkled throughout. Termite mounds, like this one (pictured below), foster the growth of trees and a shaded ecosystem where leaf litter accumulates and soil dwelling animals persist. These termite hill thickets were great for polydesmidan millipedes, amphisbaenians, and snails.


Termite mound (~3 m. tall)


Cubitermes termite queen


A caterpillar of the tineid moth Paraclystis integer (left), an inquiline of the termite Schedorhinotermes lamanianu (right). Identifications from Piotr Naskrecki.

While at Gorongosa, I encountered a bonanza of life. While the warthogs, vervets, and baboons were very endearing and roamed just a few steps from my door, the smaller animals were the most fascinating. Here are a few below, and there are more in the next post. (Note: I’m still working on identifications for most of them, and will update soon. If you know any identifications, please leave a comment!)


Jumping spider, Hyllus? (family Salticidae)


Blister beetle, Mylabris? (family Meloidae). I definitely would not touch this beetle.


Stalk-eyed flies, Diasemopsis?, mating (family Diopsidae) | Picture 2 | Picture 3


Grasshopper nymph (family Acrididae)


Microdontine hoverfly larva in ant nest (family Syrphidae)


Praying mantis (order Mantodea)


Flatty spider (family Selenopidae) taken with 365 nm UV light showing blue fluorescence


Male and female dragonflies


Phanaeus sp. scarab beetle (Scarabaeidae)


Cockroach nymph and ant on a Fever tree trunk


Assassin bug (family Reduviidae)


Millipede in an ant nest (family Julidae)


Net-winged beetle (family Lycidae). This one had a cool snout.


Bug nymphs (family Scutellaridae)


Ctenodesmine millipede Orodesminus n. sp. (family Oxydesmidae)

This was the millipede I was looking for. This is a species of polydesmidan cyanide-producing millipedes in the family Oxydesmidae. The family is characterized, in part, by little “eye” brows above their antennae. (Eye is in parentheses because these millipedes are blind, and haven’t had eyes in > 200 million years.) This particular oxydesmid has horns on its rings, which are noticeable on the first few rings (and on the photos here and here).

The millipede was discovered by Norima Niumtu, a student in the Gorongosa Biodiversity Science Education Program. Thanks Norima!

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Gorongosa National Park (part 2)


Amphisbaenian worm lizard


Dung roller beetle (family Scarabaeidae)


Giant pill millipede (family Sphaerotheriidae) | Picture 2


Scorpion (genus Uroplectes?)—likely rather venomous judging by its fat tail and thin pincers (family Buthidae)


Water measurer (family Hydrometridae)


Armored Katydid nymphs (Enyaliopsis sp., family Tettigoniidae). Image of adult.


Ceroplastes sp. scale insect (family Coccidae) tended by ant


Blister? beetle (family Meloidae)


Mantid? ootheca (order Mantodea)


Toothpick grasshopper (family Acrididae)


Jumping spider (family Salticidae)


Velvet ant (family Mutillidae)


Tortoise beetle (family Chrysomelidae)


Centipede (family Scolopendridae), perhaps missing its terminal legs


Lynx spider (family Oxyopidae) with great camouflage


Mayfly (order Ephemeroptera)


Metallic wood boring beetle (family Buprestidae)

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In the field: Clinch Mountain, Virginia


Chaetaspis albus Bollman, 1887 from Clinch Mountain, Virginia

Last Monday, we traveled to Mendota, Virginia to search for the millipede Rhysodesmus restans Hoffman, 1998. The species is one of two Appalachian representatives of the genus, and otherwise known from the Rio Grande Valley in Texas south to El Salvador (Shelley, 1999). Unfortunately, we didn’t find R. restans but collected some other interesting taxa, including the macrosternodesmid millipede Chaetaspis albus.


The polydesmidan millipede Chaetaspis albus and ectoparasitic mites visible on the head and leg-pairs 7 and 9.


Chaetaspis albus, male (top) and female (bottom). The male appears larger in body size than the female, which is unusual for most arthropods.


Male Chaetaspis albus (ventral view) and its very “macrosternodesmid-looking” gonopods on the seventh segment. Shear and Reddell (2017) suggest that the European genus Macrosternodesmus may even be a synonym of Chaetaspis based on similarity of their gonopods.


Jackson Means (left) and Derek Hennen (right) collecting millipedes in the genus Nannaria at Fugate Gap on Clinch Mountain, Virginia.

References

Bollman C. H. (1887). New genus and species Polydesmidae. Entomologica Americana, 3: 45-46. (link)

Hoffman, R. L. (1998). An Appalachian species of Rhysodesmus (Polydesmida: Xystodesmidae: Rhysodesmini). Myriapodologica, 5: 77-83. (link)

Shear, W. A. & J. M. Reddell (2017). Cave millipedes of the United States. XIV. Revalidation of the genus Speorthus Chamberlin, 1952 (Diplopoda, Polydesmida, Macrosternodesmidae), with a description of a new species from Texas and remarks on the families Polydesmidae and Macrosternodesmidae in North America. Insecta Mundi, 0529: 1-13. (link)

Shelley, R. M. (1999). A second East-Nearctic species of Rhysodesmus Cook (Polydesmidae: Xystodesmidae). Myriapodologica, 6: 19-22. (link)

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Collecting millipedes in Vietnam

Post by PhD student Derek Hennen who is an expert in millipedes and natural history

After a successful week of the 17th International Congress on Myriapodology in Krabi, our group headed on to Vietnam. Permits in hand, we landed in Hanoi around midnight and prepared for the next leg of our journey.

The next morning, we met our local contact, Dr. Anh Duc Nguyen, a scientist at the Institute of Ecology and Biological Resources and he brought us to his office. We were introduced to a few students and faculty, some of whom would be accompanying us on our collecting trips. Paul had prepared a short presentation about our lab’s work, which was well-received. Afterwards, we went on a tour of the National Museum of Natural History and then piled into a van for our journey north to Cúc Phương National Park, where our goal was: the millipede Parariukiaria. This xystodesmid millipede had been collected about a decade earlier, and we jumped at the chance to collect some new specimens for our research.

As we passed out of Hanoi and into the highlands, we became more excited. The flood plains gave way to beautiful limestone mountains jutting out of the landscape, and in a few hours we arrived at Cúc Phương. The entrance gate reminded us of the large gate of Jurassic Park, and we were itching to start collecting immediately—which we did. It was dark by the time we were all settled in our rooms, so we took our flashlights and ultraviolet lights with us and started down the road. It wasn’t long before we began finding millipedes, and we came across many millipedes in the family Paradoxosomatidae. At last, we were seeing this family in its native habitat, not just an introduced species like back in Virginia! We were surprised to find that the pill millipedes (Glomeridae) along the road fluoresced a blue-green color under UV light, reminiscent of various xystodesmid millipedes back home. If we didn’t realize we were in the jungle yet, our night collecting certainly solidified it. We came across massive insects on our walk, two particular stand outs were a stick insect that didn’t seem to mind us too much and a katydid which merely tolerated us.


The millipede Hyleoglomeris (Glomerida, Glomeridae)


Otostigmus centipede, with scale (Scolopendromorpha, Scolopendridae)


Jackson making friends with the wildlife

We spent the next few days exploring Cúc Phương and were joined by Luong Van Hien, a ranger who knew the park well and took us to great collecting spots. On our first full day in the park, we stopped at the Cave of Prehistoric Man, a large cave complex full of bats, and lucky for us, millipedes. Most of the millipedes we found there were small Polydesmida, with skeletal white Haplodesmidae in particular standing out. We were also lucky to come across a beautiful snake tucked in a corner of the cave, a Red-headed rat snake. It calmly kept an eye on us as we took photos, and wouldn’t be the last snake we saw on our trip.


Cave Haplodesmidae


Red-headed rat snake (Elaphe moellendorffi)

After our exploration of the cave, we broke for lunch and then continued our collecting. We didn’t have any luck with finding Parariukiaria, but we did come across many other millipedes. We were excited to see some giant pill millipedes in the order Sphaerotheriida, which can roll up into a tight ball about the size of a ping pong ball. While we didn’t find our target species, we couldn’t help but stop and appreciate the chorus of the rainforest while we were digging through the leaf litter. Unknown birdsong would echo through the forest, but what really impressed us were the cicadas that belted out songs that pierced through any other noise. Some sounded similar to our cicadas back home, but others sounded as though they were ripped out of a science fiction movie.


Giant pill millipede (Sphaerotheriida), curled up in defensive posture


A platydesmid millipede


A rather pugilistic harvestman crawling along a leaf

Over the next few days, we spent many hours exploring the park and searching for Parariukiara, but to no avail. We were, however, lucky enough to find many other cool millipedes and insects. We found many millipedes in the family Platyrhacidae, typically covered in dirt and camouflaged quite well amongst the leaves. We were met with many more stick insects and leaf mimic mantids, and on more than one occasion we turned over a patch of leaves to find centipedes approaching a foot long. This gave us pause.


A female platyrhacid millipede poses on a leaf (Platyrhacus borealis)


Bark mimic mantis


Paul models a rather…large centipede*

*This centipede, a member of the genus Scolopendra, was dead. We found it drowned, and then hilarity ensued; including wearing it like a brooch and like the ultimate pirate’s parrot. I do not recommend trying this at home with a live centipede.

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Collecting millipedes in Vietnam (part 2)


Temple complex in Tam Đảo National Park

Our next stop took us higher into the mountains, and we found ourselves in Tam Đảo National Park. After a beautiful drive up, we found ourselves above the clouds and were eager to begin collecting. On our first day we hiked up the mountainside past a beautiful temple complex shrouded in mist, and begun our search. Not too long after we started, we happened upon a millipede in the family Polydesmidae, and I was overjoyed. While not Parariukiaria, it will prove useful for my own research with North American representatives of the family.

A millipede in the family Polydesmidae

As we collected, the rain hit us for the first time during our trip. We had been wondering where all the rain was, and apparently it was hiding up here. We were drenched within minutes, even with rain gear, but after a thorough soaking it doesn’t become quite so uncomfortable. We couldn’t help noticing the massive beetle grubs throughout the area, and uncovered dozens as we searched through the soil.

Jackson poses before all the rain hits

Big ol’ beetles everywhere

We spent our last few days in Vietnam at Tam Đảo, but never did find any individuals of Parariukiaria. We did luck out with finding more giant pill millipedes, many Paradoxosomatidae, and other interesting millipedes, such as the feather millipedes in the family Platydesmidae, however, and this kept our spirits up. I was also lucky enough to run into a gorgeous stag beetle on the mountain one day, which was a nice surprise. A surprise that wasn’t quite as nice were the wasps on the mountainside, which became combative towards Jackson as he tried to pass by them. And of course, we made time one night to go sing karaoke (it was excellent).

Looking up in a bamboo forest

Suddenly, a stag beetle appeared!

Centipedes in the order Scutigeromorpha get much bigger in the tropics

By the time we made it back to Hanoi, we were exhausted from our collecting, but we had a lot to show for it. We had successfully collected many families of millipedes not found in North America, and had many specimens to augment our research. While we weren’t able to collect any Asian Xystodesmidae, the local scientists who joined us on our collecting trips made plans to look for it during a different season, solidifying our international collaboration. And with that, all that separated us from being home was a solid 26 hours of travel. Once we were back in Virginia, we decided to take the next day off to rest.

 

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